STEMME S12 Maintenance Manual
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STEMME S12 Maintenance Manual

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  • Page 2: Jul 20, 2016

    MAINTENANCE MANUAL STEMME S12 This aircraft may only be maintained in accordance with the instructions given in this manual. CONTACT STEMME AG Flugplatzstrasse F2, Nr. 6-7 D-15344 Strausberg Phone: +49.3341.3612-0 E-mail: info@stemme.de Web: www.stemme.com All rights reserved. Reproduction or disclosure to third parties of this document any part there of is not permitted, except with the prior and express written permission of STEMME AG.
  • Page 4 MAINTENANCE MANUAL STEMME S12 THIS PAGE IS INTENTIONALLY LEFT BLANK CHAPTER-PAGE 0-4 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 5: List Of Effective Pages

    MAINTENANCE MANUAL STEMME S12 LIST OF EFFECTIVE PAGES his list is only valid for the serial no. specified on title page. The list contains all amendments of the maintenance manual, effective until final approval of this serial no. amendments added later must be recorded.
  • Page 6 MAINTENANCE MANUAL STEMME S12 PAGE APPROVED AM. NO. DATE PAGE APPROVED AM. NO. DATE 3-31 JUL 20, 2016 JUL 20, 2016 3-32 JUL 20, 2016 3-33 JUL 20, 2016 CHAPTER 5 3-34 JUL 20, 2016 JUL 20, 2016 3-35 JUL 20, 2016...
  • Page 7 MAINTENANCE MANUAL STEMME S12 PAGE APPROVED AM. NO. DATE PAGE APPROVED AM. NO. DATE 5-37 JUL 20, 2016 7-16 JUL 20, 2016 5-38 JUL 20, 2016 7-17 JUL 20, 2016 5-39 JUL 20, 2016 7-18 JUL 20, 2016 5-40 JUL 20, 2016...
  • Page 8 MAINTENANCE MANUAL STEMME S12 PAGE APPROVED AM. NO. DATE PAGE APPROVED AM. NO. DATE JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016 JUL 20, 2016...
  • Page 9 MAINTENANCE MANUAL STEMME S12 PAGE APPROVED AM. NO. DATE PAGE APPROVED AM. NO. DATE F-19 JUL 20, 2016 F-20 JUL 20, 2016 F-21 JUL 20, 2016 F-22 JUL 20, 2016 F-23 JUL 20, 2016 F-24 JUL 20, 2016 F-25 JUL 20, 2016...
  • Page 10 MAINTENANCE MANUAL STEMME S12 THIS PAGE IS INTENTIONALLY LEFT BLANK CHAPTER-PAGE 0-10 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 11: Table Of Contents

    MAINTENANCE MANUAL STEMME S12 CONTENTS MANUAL CONTENTS Cover Sheet....................... 0-1 Record of Amendments................0-3 List of Effective Pages .................. 0-5 Contents....................0-11 General....................... 1-1 remarks on maintenance................1-1 Conversion Table................... 1-3 Abbreviations....................1-4 Safety symbols.
  • Page 12 MAINTENANCE MANUAL STEMME S12 3.4.7 Engine Controls and Instrumentation............. 3-19 3.4.8 Fire Protection.................... 3-19 3.4.9 Engine Cowlings..................3-19 3.4.10 Propeller....................3-20 3.4.10.1 Design of Variable Pitch Propeller..............3-21 3.4.10.2 Propeller Blades...................3-21 3.4.10.3 Propeller Blade Angle Control Mechanism............3-21 3.4.10.4 Propeller Weight Balance.
  • Page 13 MAINTENANCE MANUAL STEMME S12 3.7.7.3 Semiconductor Switch Box................3-47 3.7.8 Main System Distribution Box................ 3-47 3.7.9 Engine System Distribution Box ..............3-47 3.7.10 TCU Board....................3-47 3.7.11 Instrument Panel Bus System................ 3-49 3.7.12 Engine Starting System (ATA 80-00-00)............3-50 3.7.12.1...
  • Page 14 MAINTENANCE MANUAL STEMME S12 3.7.21.1 Description....................3-56 3.7.21.2 Parts Specification..................3-56 COM and NAV Equipment................3-57 Oxygen System................... 3-59 3.10 Wing Folding Device..................3-61 Airworthiness Limitations Section..............4-1 General.......................4-2 Maintenance Limitations................4-2 4.2.1 Paint Finish.
  • Page 15 MAINTENANCE MANUAL STEMME S12 5.4.20 Electric System (except for engine and TCU)........... 5-35 5.4.21 COM and NAV Equipment................5-35 5.4.22 Completion Tasks..................5-36 5.4.23 Optional Equipment..................5-37 Special Inspections..................5-39 5.5.1 Inspection Following a Heavy Landing or a Wing Tip Landing......5-39 5.5.2...
  • Page 16 MAINTENANCE MANUAL STEMME S12 Cockpit.......................7-7 7.2.1 Canopy......................7-7 7.2.1.1 Condition and Function.................7-7 7.2.1.2 Test of Canopy Emergency Jettison..............7-7 7.2.1.3 Re-Installation of the Canopy.................7-8 7.2.2 Equipment and Systems.................7-9 7.2.2.1 Seat Belts....................7-9 7.2.2.2 Instruments and Switches................7-9 7.2.2.3...
  • Page 17 MAINTENANCE MANUAL STEMME S12 7.4.3.2 Flushing of Cooling System................7-20 7.4.3.3 Coolant Replacement.................. 7-20 7.4.3.4 Ram Air Cooling...................7-21 7.4.4 Air Induction System..................7-21 7.4.4.1 Intercooler and Air box..................7-21 7.4.4.2 Air filter......................7-21 7.4.5 Exhaust System...................7-21 7.4.5.1...
  • Page 18 S12 Main System - DC Generation................F-15 g) S12 Main System - Landing Gear................F-17 h) S12 Main System - Electrical Trim................F-19 i) S12 Main System - Autopilot..................F-21 j) S12 Main System - Fire Warning................F-23 k) S12 Main System - Lighting.
  • Page 19 MAINTENANCE MANUAL STEMME S12 n) S12 Engine System - DC Generation................F-31 o) S12 Engine System - Engine Monitoring and Control........... F-33 p) S12 Engine System - Fuel Pumps and Indication............F-35 q) S12 Engine System - Propeller Control............... F-37...
  • Page 20 MAINTENANCE MANUAL STEMME S12 THIS PAGE IS INTENTIONALLY LEFT BLANK CHAPTER-PAGE 0-20 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 21: General

    GENERAL REMARKS ON MAINTENANCE The legal owner or operator of the STEMME S12 is obliged to ensure that the maintenance of the aircraft follows the instructions of this manual in accordance with applicable national laws and regulations. Among others, these include: •...

  • Page 22: Chapter-Page

    NOTICE Materials required and recommended procedures for minor repairs on composite materials are indicated in the repair guide »Small Repairs of Composite Materials« in Annex A of the S12 Aircraft Maintenance Manual. In case of any incident endangering airworthiness, the manufacturer must be informed imme- diately.

  • Page 23: Conversion Table

    MAINTENANCE MANUAL STEMME S12 CONVERSION TABLE For the conversion of technical data the following factors have been used: Data Factor 1 cubic in 16.387 cm 1 dr 1.772 g 100 fpm 0.508 m/s 1 ft 0.3048 m 1 ft lb 1.356 Nm...

  • Page 24: Abbreviations

    MAINTENANCE MANUAL STEMME S12 ABBREVIATIONS The following abbreviations are being used for clarity: Anti-Collision Light AD’s Airworthiness Directives Above Ground Level Aircraft Maintenance Manual ANSI American National Standards Institute Angle Of Attack ASAP As Soon As Possible Airspeed Indicator All-Up-Weight...

  • Page 25: Chapter-Page

    MAINTENANCE MANUAL STEMME S12 Outside Air Temperature Over Voltage Protection Pilot In Command Propeller Pitch Control Push To Talk Rate Of Climb Right Hand Reference Plane Revolutions Per Minute Resistance Temperature Detector Runway SB’s Service Bulletins Service Information Service Letter...

  • Page 26: Safety Symbols

    MAINTENANCE MANUAL STEMME S12 SAFETY SYMBOLS The following safety instructions are based loosely on the ANSI Z535. Symbols Z535.3 Criteria for Safety Symbols Signs and Labels Z535.4 Product Safety Signs and Labels Product Safety Z535.6 Product Safety Information in Product Manuals, Instructions, and Other Collateral Materials.

  • Page 27: Description

    The retractable two-wheel main landing gear is electrically operated and is equipped with hydraulic wheel brakes. The engine of the STEMME S12 is based on the ROTAX 914 F2-01, which has been certificated by BRP-ROTAX® GmbH & Co.KG, Austria. STEMME modified the arrangement of some accessories (induction and exhaust system including turbo-charger, engine mounts etc.) to adapt the systems...

  • Page 28: Technical Data

    MAINTENANCE MANUAL STEMME S12 TECHNICAL DATA FUSELAGE Design Front section CFRP-Kevlar-GFRP-structure, center steel frame, GFRP-fairing, tail boom with inte- grated vertical tail fin (CFRP). Length 8.42 m 27.62 ft Width 1.18 m 3.87 ft Cockpit width 1.16 m 3.81 ft Cockpit height 0.93 m...

  • Page 29: Chapter-Page

    MAINTENANCE MANUAL STEMME S12 VERTICAL TAIL Design Web GFRP, skin CFRP, rudder GFRP-sandwich. Span 1.60 m 5.25 ft Area 1.78 m² 19.16 sqft Airfoil FX71-L150/30 x*1.3 WEIGHTS Max. T/O-weight 900 kg 1984 lb Empty weight 690 kg 1556 lb (approx., min. equipment.)

  • Page 30: Chapter-Page

    MAINTENANCE MANUAL STEMME S12 ENGINE Design 4-cylinder 4-stroke-Otto-motor, opposed type, turbocharged, electronic manifold pressure control integrated reduction gear. Type ROTAX 914 F2-01/S1 Engine reduction gear ratio i = 2.4286 Bore 79.5 mm 3.13 in Stroke 61 mm 2.40 in Displacement 1211 cm 73.9 cubic in...

  • Page 31: Chapter-Page

    MAINTENANCE MANUAL STEMME S12 PROPELLER Design 2-blade folding propeller, CFRP blades, propeller hub and blade suspension. Forks aluminum. Pitch control via electrically heated thermo elements. Type STEMME 11 AP-V Propeller diameter 1.63 m 5.35 ft Mass of the propeller 9350 g 20.61 lb...

  • Page 32: Chapter-Page

    33.28 US gal. 27.72 Imp.gal. Unusable fuel 1.4 l 0.37 US gal. 0.31 Imp.gal. NOTICE For more technical data, please refer to the S12 Aircraft Flight Manual. CHAPTER-PAGE 2-6 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 33: Three View Drawing

    8.4 m / 27.56 ft 1.9 m / 6.23 ft 9.9 m / 32.48 ft 25.07 m / 82.25 ft Figure 2.2.a Three View Drawing of the S12 CHAPTER-PAGE 2-7 DOCUMENT NUMBER: AMENDMENT: 00 L500-912.820 ISSUE JUL 20, 2016 DATE: --...

  • Page 34: Chapter-Page

    MAINTENANCE MANUAL STEMME S12 THIS PAGE IS INTENTIONALLY LEFT BLANK CHAPTER-PAGE 2-8 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 35: Description Of Assemblies

    MAINTENANCE MANUAL STEMME S12 DESCRIPTION OF ASSEMBLIES AIRFRAME, PRIMARY AND SECONDARY STRUCTURE The Primary Structure includes: • Wing spars, root ribs, and wing spar boxes • Wing shells • Center steel frame • Tail boom and vertical stabilizer • Front section of fuselage •...

  • Page 36: Fuselage

    3.2.1 GENERAL The two seats are arranged side by side (forward of the wing) and the S12 is equipped with dual controls. The FRP seat backrests are multi-adjustable. Each seat is equipped with 4-point seat belts with a center locking mechanism.

  • Page 37: Control Elements And Instruments

    MAINTENANCE MANUAL STEMME S12 The emergency jettison will be activated by opening either lateral locking lever on canopy side (operating one is sufficient) and the red T-shaped handle on the instrument panel. Canopy hinge opens and is lifted approximately 0.1 m / 4 in by a gas spring.
  • Page 38 MAINTENANCE MANUAL STEMME S12 Name of Control Airframe Position Propeller Pitch Switch on center console. The forward position is the TAKE- OFF position. A green light located in the upper area of left instrument panel indicates if propeller pitch (not switch) is in T/O)-position.

  • Page 39: Controls At The Instrument Panel

    INSTRUMENT PANEL The following description gives an overview of instruments, controls, monitor devices and CB’s installed on the instrument panel. The minimum Equipment List of the S12 Aircraft Fligth Manual is relevant. The positions of the elements are shown in figure »3.2.3.a Arrangement of Elements on the In- strument Panel«, valid for the aircraft serial number as indicated on the title page of this Aircraft...
  • Page 40 MAINTENANCE MANUAL STEMME S12 seat (e. g. instruction flights). Additional avionics may be installed on customer demands and concurrent applicable approval. Engine monitoring includes at least: • Tachometer • Oil pressure and oil temperature • Cylinder head temperature (CCT) LH and RH •...

  • Page 41: Chapter

    MAINTENANCE MANUAL STEMME S12 The lower center section of the instrument panel comprises a row of levers and switches. Any switches, except a switch to select voltmeter indication at the upper RH panel, are systematically arranged here. The red handle for canopy emergency jettison is installed LH of the row of switches.
  • Page 42 MAINTENANCE MANUAL STEMME S12 Figure 3.2.3.a Arrangement of Elements on the Instrument Panel (Related to S/N Indicated on Title Page) CHAPTER-PAGE 3-8 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 43: Flight Control System

    MAINTENANCE MANUAL STEMME S12 FLIGHT CONTROL SYSTEM 3.3.1 LONGITUDINAL CONTROL Both control sticks are coupled by a connection tube. The control movements are transmitted via push-pull rods to the end of the tail boom and then straight up to the elevator fitting. In the tail boom, the push-pull rod is supported by linear motion ball bearings.

  • Page 44: Control Of Air Brakes

    MAINTENANCE MANUAL STEMME S12 3.3.5 CONTROL OF AIR BRAKES The air brake-levers are coupled by means of a connection tube. Travel of the levers is transmitted via push rods and bell-crank levers to a driving lever (over-center strut) in the center fuselage, from which it is transmitted via push rods and quick release couplings to push-pull rods in the wing, which then move the air brakes.

  • Page 45: Power-Plant

    The ROTAX 914 F2/S1 is modified by STEMME and based on the type ROTAX 914 F2. The modification was completed as a co-operation with ROTAX and with approval by ROTAX.

  • Page 46: Lubrication System

    MAINTENANCE MANUAL STEMME S12 • In the liquid cooling system, the combined function of the expansion reservoir and refill container was split up in two separate containers, with the expansion reservoir located above the engine and the refill container on the left side of the fire-wall.

  • Page 47: Cooling System

    MAINTENANCE MANUAL STEMME S12 3.4.3 COOLING SYSTEM SYSTEM DESCRIPTION Refer to »Maintenance Manual (Heavy Maintenance) for ROTAX Engine Types ROTAX 912 and 914 Series«, section 75. Engine is cooled by liquid cooled cylinder heads, ram air cooled cylinders and by cooling the oil.

  • Page 48: Air Induction System

    MAINTENANCE MANUAL STEMME S12 3.4.4 AIR INDUCTION SYSTEM SYSTEM DESCRIPTION Refer to the »Maintenance Manual (heavy maintenance) for ROTAX Engine Types ROTAX 914 Series«, section 73. The engine induction air is routed from the RH inlet cowl flap via a duct, an air filter, and a short flexible tube to the turbocharger unit.

  • Page 49: Fuel System

    Electronic System Boxes on top of the steel frame. NOTICE For the location of the listed switches, lights or indicators please refer to the S12 Aircraft Flight Manual, section »7.3 Instrument Panel«. CHAPTER-PAGE 3-15...

  • Page 50: Fuel System Design

    MAINTENANCE MANUAL STEMME S12 3.4.6.2 FUEL SYSTEM DESIGN WING FUEL SYSTEM Both wing tanks are located in the outer sections of the wing center section. The ends of the vent lines are located at the lower, outer ends of the wing center section. The filler caps are located on the upper surface of the wing center section.

  • Page 51: Electrical Layout And Operation Of The Fuel Pumps

    MAINTENANCE MANUAL STEMME S12 3.4.6.4 ELECTRICAL LAYOUT AND OPERATION OF THE FUEL PUMPS For normal operation, the auxiliary fuel pump is switched off, and only the main pump is operat- ing. The main pump is electrically supplied by the internal generator of the engine, or the engine battery respectively.
  • Page 52 MAINTENANCE MANUAL STEMME S12 Coarse-Filter Fine-Filter Right Transfer-Pump Feeder Tank Left Transfer-Pump Fine-Filter Coarse-Filter Figure 3.4.6.a. Diagram of the Fuel System CHAPTER-PAGE 3-18 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 53: Engine Controls And Instrumentation

    MAINTENANCE MANUAL STEMME S12 3.4.7 ENGINE CONTROLS AND INSTRUMENTATION REFER ALSO SECTION »3.2.2« The throttle and choke are operated by Bowden cables, linking the carburetors with the cockpit levers, which have adjustable friction control. The throttle and choke lever are installed in the center console between the pilots.

  • Page 54: Propeller

    MAINTENANCE MANUAL STEMME S12 The air inlet of the RH cowling distributes the air for cylinder ram air cooling, for the intercooler and for the oil radiator. When installing the RH cowling, the opening for the cylinder cooling is pressed against a rubber sealing on the coupling sheet of the upper support of the cylinder cooling air hose, routed to the distribution plenum for the cylinders.

  • Page 55: Design Of Variable Pitch Propeller

    MAINTENANCE MANUAL STEMME S12 3.4.10.1 DESIGN OF VARIABLE PITCH PROPELLER The numerical positions in the following text refer to the propeller diagram (see figure »3.4.10 a/b«). The propeller blades (1) are hinged in a forked mounting plate (4). The complete assembly, con- sisting of the fork, blade and hub, is rotated in order to set the pitch angle of the blade.
  • Page 56 MAINTENANCE MANUAL STEMME S12 Figure 3.4.10.b. Figure 3.4.10.a Variable Pitch-Propeller * The numbering of the position in accordance with the “Propeller Adjustment Report”. CHAPTER-PAGE 3-22 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...
  • Page 57 MAINTENANCE MANUAL STEMME S12 Position Part Number Propeller blade Needle bearing (articulated joint) Hollow axle Blade suspension fork Thrust plate Propeller hub Grooved ball bearing Axial needle bearing Grooved ball bearing Drive pin Coupling Part Synchronization ring Push rod Rocking lever...

  • Page 58: Propeller Weight Balance

    MAINTENANCE MANUAL STEMME S12 3.4.10.4 PROPELLER WEIGHT BALANCE The variable pitch propeller is balanced by the manufacturer. Final balancing is accomplished by means of balancing weight washers fastened on the base-plate of the pitch change unit. The positions provided on the base-plate for fastening of the washers are shown in figure »3.4.10 c«.

  • Page 59: Expansion Element And Control System

    MAINTENANCE MANUAL STEMME S12 WARNING Balancing the variable pitch propeller or its assemblies may only be performed by the manufac- turer or by authorized and licensed maintenance facilities according to the specific instructions and using appropriate equipment. The positions, number and weights of the balancing weight washers of the individual propeller must be entered in the maintenance form »Propeller Adjustment Report«...

  • Page 60: Identification Of Propeller System And Assembly

    MAINTENANCE MANUAL STEMME S12 3.4.10.6 IDENTIFICATION OF PROPELLER SYSTEM AND ASSEMBLY Complete Propeller 11 AP V / XXXXX / YYYY Propeller Blade 11 AP VB / XXXXX - ZZ Number of ordering for production share (corresponds to the aircraft serial no. for complete propeller);...

  • Page 61: Operation Mechanism Of The Propeller Folding System

    MAINTENANCE MANUAL STEMME S12 3.4.13 OPERATION MECHANISM OF THE PROPELLER FOLDING SYSTEM 3.4.13.1 NOSE-CONE The nose-cone forms the fuselage nose in front of the cockpit section and covers the folded pro- peller during flight in glider configuration. To change from gliding to powered flight, the nose- cone can be shifted forward to allow the propeller unfold and rotate after starting the engine.

  • Page 62: Propeller Brake

    MAINTENANCE MANUAL STEMME S12 3.4.13.3 PROPELLER BRAKE The propeller brake is used to decelerate the propeller rotation to a full stop after engine shut down in flight, to allow folding of the propeller by spring forces. It is operated by a pull handle on the lower instrument panel (see figure »3.2.3.a«).
  • Page 63 Use only the appropriate fuel, recommended for the climate zone. NOTICE In accordance with the EASA SIB 2011-01 R2 “Unleaded Aviation Gasoline (AVGAS) UL91” is also approved for operation. (See STEMME »SB A31-10-104« latest approved revision). CHAPTER-PAGE 3-29 DOCUMENT NUMBER: AMENDMENT: 00 L500-912.820 ISSUE JUL 20, 2016...

  • Page 64: Coolant Fluid

    MAINTENANCE MANUAL STEMME S12 3.4.14.2 COOLANT FLUID Mixture of 50% concentrated antifreeze agent with anti-corrosion additives and 50% water. Freezing point of this mixture is about -38°C / -34°F. »BASF Glysantin Antikorrosion« has proved to be good; this or equivalent coolant may be used.

  • Page 65: Lubricants

    MAINTENANCE MANUAL STEMME S12 3.4.14.3 LUBRICANTS ENGINE WITH INTEGRATED REDUCTION GEAR According to the ROTAX Operation Manual the following oil specification should be met: • Use only oil with API classification SG or higher! • Due to the high stresses in the reduction gears, oils with gear additives such as high performance motor cycle oils are recommended.
  • Page 66 MAINTENANCE MANUAL STEMME S12 Viscosity: Use of multi-grade oils is recommended. Viscosity of multi-grade oils is less depending on tem- perature compared to single-grade oils. Multi-grade oils can be used year-round; after an engine start at low temperatures the engine components are lubricated faster and at higher temperatures the oil is heavier.

  • Page 67: Landing Gear

    MAINTENANCE MANUAL STEMME S12 LANDING GEAR 3.5.1 MAIN LANDING GEAR The landing gear (L/G) consists of a tail wheel and two retractable main landing gear legs, hinged at the center fuselage frame with the hinge axis in flight direction and locked in the extended position by means of an over-center locking strut (“elbow lever”) for each leg.

  • Page 68: Tail Wheel

    MAINTENANCE MANUAL STEMME S12 MAIN LANDING GEAR EMERGENCY EXTENSION By pulling two T-handles in the cockpit, one after the other, the landing gear actuators are dis- connected from the locking elbow struts by means of Bowden cables and the landing gear legs extend by gravity to the “gear down”...

  • Page 69: Flight Control Instruments, Pitot Static System

    MAINTENANCE MANUAL STEMME S12 FLIGHT CONTROL INSTRUMENTS, PITOT STATIC SYSTEM Instruments: See Equipment List. CAUTION For modifications sections »3.8« and »9« must be respected. Pitot pressure, static pressure and total energy compensation are measured by means of a multi-purpose probe in the nose-cone. Its orifices are plumbed to the instrument panel through the nose-cone sliding tube.
  • Page 70 MAINTENANCE MANUAL STEMME S12 Figure 3.6.a Pitot and Static Pressure System NOTICE Any line must be as short as possible. The water/separator filters must always be located upstream of the device and upstream of any junction. CHAPTER-PAGE 3-36 AMENDMENT: 00...

  • Page 71: Electrical System

    3.7.1 GENERAL SYSTEM ARCHITECTURE The electrical system of the S12 consists of two independent, separate sub-systems: the main system and the engine system. Each system incorporates a dedicated battery and generator (actually an alternator and rectifier for the main system). Failures of one system will not interfere the other system.
  • Page 72 MAINTENANCE MANUAL STEMME S12 MAIN SYSTEM ENGINE SYSTEM COM / NAV ENGINE MAIN AND TRIM TRANSFER FUEL PUMP LAND. GEAR LIGHTS ENG MONITOR AUTOPILOT AUX.FUEL PUMP PROP PITCH CTRL. EXT. ALT INT. GEN MAIN SYSTEM BATTERY ENGINE SYSTEM BATTERY Figure 3.7.a...

  • Page 73: Dc Generation (Ata 24-30-00)

    MAINTENANCE MANUAL STEMME S12 3.7.2 DC GENERATION (ATA 24-30-00) 3.7.2.1 MAIN SYSTEM DC POWER GENERATION The DC power for the main system is generated by the belt-driven alternator of the engine and stored in a LiFePO4 battery. MAIN SYSTEM BATTERY...

  • Page 74: Engine System Dc Power Generation

    MAINTENANCE MANUAL STEMME S12 3.7.2.2 ENGINE SYSTEM DC POWER GENERATION The DC power for the engine system is generated by the crankshaft-mounted generator of the engine and stored in a LiFePO4 battery. The battery is used to crank the engine to start.

  • Page 75: Over Voltage Protection

    MAINTENANCE MANUAL STEMME S12 3.7.2.3 OVER VOLTAGE PROTECTION The outputs of the belt driven alternator and of the internal generator are monitored by a dedicated over-voltage device OVP. The device senses the voltage of the related system and disconnects the related alternator resp.

  • Page 76: Dc Power Distribution System (Ata 24-60-00)

    DC POWER DISTRIBUTION SYSTEM (ATA 24-60-00) The system is designed to distribute electrical energy from the source to the electrical loads. Be- cause the engine of the S12 is located in mid-fuselage, there are long distances between voltage sources and the loads.

  • Page 77: Protection Devices

    MAINTENANCE MANUAL STEMME S12 3.7.6.3 PROTECTION DEVICES Fuses and circuit breakers of different industrial standards are used to protect each electrical circuit. The protective devices are rated according to the maximum allowed electrical load of the protected wire. Protection devices are located as close as possible to the voltage source to mini- mize the length of unprotected wire.

  • Page 78: Fuse And Cb Specifications: Main System

    MAINTENANCE MANUAL STEMME S12 3.7.6.4 FUSE AND CB SPECIFICATIONS: MAIN SYSTEM Circuit Location of Fuse/CB Fuse /CB STEMME p/n Qualification Rating (A) Main System Master Main System Box 832.247 ISO 8820-5 Fuse External Alternator Main System Box 832.247 ISO 8820-5...

  • Page 79: Fuse Specifications: Engine System

    MAINTENANCE MANUAL STEMME S12 3.7.6.5 FUSE SPECIFICATIONS: ENGINE SYSTEM Circuit Location of Fuse/CB Rating (A) STEMME p/n Qualification Starter 831.491 External Power Supply Engine System Box 831.491 ISO 8820-5 System Master Fuse 831.247 Engine Bus Supply Internal Generator 831.432 Prop Pitch Control Power...

  • Page 80: Manual Switches

    MAINTENANCE MANUAL STEMME S12 3.7.7.1 MANUAL SWITCHES Manual switches are located on the instrument panel and easy to reach by the crew. The position of a toggle or rotary switch is indicated by the position of the operating lever or knob. The use of...

  • Page 81: Semiconductor Switch Box

    MAINTENANCE MANUAL STEMME S12 3.7.7.3 SEMICONDUCTOR SWITCH BOX An 8-channel MOSFET-based switch box is installed to control the power for fuel pumps, lights and variable pitch propeller. The use of semiconductors improves the system reliability, reduces electromagnetic emissions and saves weight and space. The switch box is located close to the batteries and to the distribution boxes.
  • Page 82 MAINTENANCE MANUAL STEMME S12 The elements are screwed to a mounting plate, which is fixed to the steel tube frame, aft of the engine compartment. 1. Batteries 2. Shunts 3. Engine System Box 4. Main System Box Figure 3.7.a Electrical Components Center Fuselage...

  • Page 83: Instrument Panel Bus System

    MAINTENANCE MANUAL STEMME S12 2. Shunts 3. Engine System Box 4. Main System Box 5. TCU Box Figure 3.7.b Electrical Components Center Fuselage 3.7.11 INSTRUMENT PANEL BUS SYSTEM Two fuse holders, one for each system, are located behind the instrument panel. Each fuse holder forms a distribution bus.

  • Page 84: Engine Starting System (Ata 80-00-00)

    ROTAX 914 Maintenance Manual. 3.7.12.3 OPERATION The starter relay is triggered when the key switch is pushed to the “Start” position. The procedure to start the engine is described in the S12 Aircraft Flight Manual. CHAPTER-PAGE 3-50 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 85: Engine Ignition System (Ata 74-00-00)

    • In “START” position the control inputs of both ignition boxes are momentarily connected to ground and the ignition is inhibited for approximately 3 seconds. The engine starting procedure and operation of the ignition-starter-key-switch is described in the S12 Aircraft Flight Manual. CHAPTER-PAGE 3-51 DOCUMENT NUMBER: AMENDMENT: 00 L500-912.820 ISSUE JUL 20, 2016...

  • Page 86: Parts Specification

    The CHT Indication system does not require operation actions by the pilot. Scale markings of operational limits and instructions to the pilot about corrective actions in the case of exceeded limits are defined in the S12 AFM. CHAPTER-PAGE 3-52 AMENDMENT: 00...

  • Page 87: Oil Pressure Indicating System (Ata 79-31-00)

    MAINTENANCE MANUAL STEMME S12 3.7.16 OIL PRESSURE INDICATING SYSTEM (ATA 79-31-00) 3.7.16.1 DESCRIPTION The oil pressure indicating system measures the pressure at the output of the mechanical oil pump of the ROTAX 914 engine. A transducer generates a voltage of 0…5 V proportional to the pressure.

  • Page 88: Description

    MAINTENANCE MANUAL STEMME S12 3.7.17.3 OPERATION The oil temperature indication system does not require operation actions by the pilot. Scale markings of operational limits and instructions to the pilot about corrective actions in the case of exceeded limits are defined in the AFM.

  • Page 89: Parts Specification

    MAINTENANCE MANUAL STEMME S12 3.7.18.4 TRANSFER PUMP CONTROL AND TANK SELECTION The transfer pumps are powered by the engine electrical system. They transfer pumps are con- trolled by a float switch in the feeder tank and by a pump selector switch. At feeder tank fuel levels below 90% the transfer pump control is active.

  • Page 90: Fuel Pressure Indicating (Ata 73-32-00)

    If the fuel pressure exceeds the limits, the pilot has to check the available amount of fuel and the state of the tank selector and the auxiliary fuel pump. Instructions about appropriate corrective actions are included in the S12 Aircraft Flight Manual. 3.7.21 FIRE DETECTION SYSTEM (ATA 26-12-00) 3.7.21.1...

  • Page 91: Com And Nav Equipment

    Only equipment listed in section »9« of this Maintenance Manual and approved for installation in the S12 may be installed without additional certification. Only this equipment has been proven by the manufacturer in accordance with the relevant certification requirements regarding initial airworthiness and proper function.
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  • Page 93: Oxygen System

    MAINTENANCE MANUAL STEMME S12 OXYGEN SYSTEM One or maximum two oxygen system mountings (optional equipment) for one oxygen bottle each are installed in the upper baggage compartment. The mountings are suitable for oxygen bottles from various manufacturers, provided the diameter is within a minimum of 0.132 m / 5.20 in, and the total length including regulator is approx.
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  • Page 95: 3.10 Wing Folding Device

    MAINTENANCE MANUAL STEMME S12 3.10 WING FOLDING DEVICE The Stemme S12 optionally can be equipped with a wing folding device. A description of the functioning and the handling is to be found in the associated supplement to the S12 Aircraft Flight Manual.
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  • Page 98: General

    GENERAL This chapter defines the mandatory overhaul (TBO – Time Between Overhaul), replacement (TBR – Time Between Replacement), and inspection intervals for components of the STEMME S12. The chapter also defines the structural inspection requirements for the STEMME S12 composite airframe.

  • Page 99: Component Replacement And Overhaul Limitations

    The IPC chapters mentioned below refer to the Illustrated Parts Catalog (IPC) for Type S10, Model S12 Doc.-No- L530-912.830 or latest revision. MAXIMUM ALLOWABLE OPERATING TIMES Part/Assembly/...
  • Page 100 MAINTENANCE MANUAL STEMME S12 NOTES 1. Overhauls of STEMME–manufactured components may only be performed in accordance with manufacturer–approved data. 2. Under extreme environmental conditions (hot, dusty) greasing of the propeller blade bearings as part of the overhaul can be required more frequently if indicated during Annual Inspection.

  • Page 101: Structural Limitations

    MAINTENANCE MANUAL STEMME S12 STRUCTURAL LIMITATIONS The airframe composite structure of the STEMME S12 (including various STEMME P/N’s) is currently life limited to 6000 hours of flight time. Extension of service life above 6000 hours can be achieved only by alteration from replace- ment (TBR) to TBO and introduction of an additional overhaul at 6000 hours and a subsequent mandated overhaul interval (TBO) for continuing airworthiness.
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  • Page 103: Time Limits / Maintenance Checks

    • Section »5.1«: Overhaul and Replacement Schedule, lists manufacturer–recommended times–in service for overhauling, rebuilding, and replacing components. • Section »5.2»: Pre-Flight Inspections are defined in the S12 Aircraft Flight Manual. • Section »5.3«: Periodic Inspections, discusses mandatory periodic inspections generally with the caveat that less benign operating conditions reasonably entail more frequent inspections than the required minimum intervals provide.

  • Page 104: Overhaul And Replacement Schedule

    STEMME strongly recommends adherence to the chapter »5« overhaul and replacement schedule, including the overhaul and replacement times applicable to the components listed below. Overhaul and replacement of these items is to be done on condition but as STEMME recommendation not later than stated in the following table.
  • Page 105 MAINTENANCE MANUAL STEMME S12 RECOMMENDED OPERATING TIMES BETWEEN OVERHAUL AND REPLACEMENT Manufacturer STEMME Overhaul Replace- Notes Part/Assembly/ Equipment Chapter ment Engine STEMME AG, 71-01 15 years (1)(3) ROTAX 914F2/S1 Rubber parts of ROTAX,Various 71-01 5 years the engine Rubber Fuel hoses...
  • Page 106 MAINTENANCE MANUAL STEMME S12 NOTES 1. The TBO for the STEMME engine type ROTAX 914 F2/S1 is established on the basis of the engine type ROTAX 914 F2-01 in following ROTAX Service Bulletins »Extension of the Time Between Overhauls« (TBO): SB 914-039, Initial Issue, dated March 25, 2010 or later approved.
  • Page 107 MAINTENANCE MANUAL STEMME S12 8. Refer to instructions prescribed by the component manufacturers—airworthiness limita- tions section of the manufacturer documentation, applicable maintenance manual, Ser- vice Bulletins, etc.—for those manufacturer’s permissible service life limits and overhaul recommendations of components. NOTICE If the limitation is given in operating hours and in a calendar period, whichever limitation is reached first is applicable.
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  • Page 109: Pre-Flight Inspections

    Fuel system pressure tests are required with in Daily Inspection as defined in Chapter »4.« of the S12 Aircraft Flight Manual. Pressure test the fuel system before first engine start each day and after maintenance. Transfer pumps respond to draining of the feeder tank, refer to section »7.4.6.2«...

  • Page 110: Inspection Intervals

    The reasonable intervals for general maintenance depend on operating conditions, climate, han- garage, etc. The types and intervals of the minimum scheduled maintenance established for the S12 are indicated in the table below. ANNUAL INSPECTIONS The motorglider must undergo a complete inspection each 12 calendar months. The inspection has to be carried out according to applicable national requirements by an authorized maintenance person.
  • Page 111 MAINTENANCE MANUAL STEMME S12 This means that: • A 100 engine hours inspection shall be done every 100 hours of engine operation; • A 100 engine hours inspection shall be done every 200 hours of engine operation; plus additional 200 engine hours checks: - Check spark plug connectors for tight fit;...

  • Page 112: General Remarks On Periodic Inspections

    In addition, special inspections may be prescribed by the responsible authority or may be recom- mended by the manufacturer; those inspections must be performed as required in accordance with the issued directives and the Federal Aviation Regulations that apply to N-registered STEMME aircraft.

  • Page 113: Unscheduled Maintenance

    • Sudden Stop or any Impact (possible ground contact) of the Propeller that reduces engine RPM, or • Failure to perform the periodic inspections specified in the S12 Maintenance Manual, or • Foreign Object Damage (FOD) If the inspection of the propeller indicates detectable damage beyond mere cosmetic distress to the propeller, whether by ground contact, bird strike, stone strike or other impact, a qualified and authorized maintenance person shall determine the extent of the damage.

  • Page 114: Special Conditions And Cautionary Notice

    MAINTENANCE MANUAL STEMME S12 5.3.4 SPECIAL CONDITIONS AND CAUTIONARY NOTICE Airplanes operated with high take-off/landing frequency or engaged in flight school use will likely need more frequent inspections. In addition, more frequent inspections and maintenance will be indicated for: • Airplanes that are either stored or operated under other conditions than normal, •...
  • Page 115 No maintenance checklist and table of requirements can replace the good judgment of a certified airframe and power plant mechanic. STEMME urges owners and operators, as these are primarily responsible for the airworthiness of the airplane, to select only qualified and authorized maintenance persons who have or can obtain adequate qualification and experience for STEMME and ROTAX products.

  • Page 116: Inspection Groups And Maintenance Criteria

    MAINTENANCE MANUAL STEMME S12 5.3.6 INSPECTION GROUPS AND MAINTENANCE CRITERIA VISUAL INSPECTION When called for in conjunction with an inspection task, or at any time that an area is visible during an inspection or maintenance action, the following visual inspection criteria shall be accomplished without requiring disassembly or removal of adjacent equipment unless otherwise specified or indicated.
  • Page 117 MAINTENANCE MANUAL STEMME S12 wear, cracking, obstruction of drainage or vent holes, deformation, signs of overheating, fluid saturation and any other apparent damage. • Metal Parts: Securely installed, condition of finish, cleanliness, distortion, fatigue cracks, welding cracks, corrosion, and any other apparent damage.
  • Page 118 MAINTENANCE MANUAL STEMME S12 • Filters and Screens: Filters and screens shall be removed, cleaned, and inspected for contamination and shall be replaced as appropriate or required. Fuel filters encased in metal should be replaced at the recommended intervals. • Wet Fuel Areas:...

  • Page 119: Other Particulars Of Maintenance

    • Comply with torque values listed in relevant sections of this AMM, e.g. for the airframe, section 6.8. For the STEMME-ROTAX 914 F2/S1 engine refer to torque values in the Mainte- nance Manual (Line Maintenance) for ROTAX Engine Type 914 Series (Annex E to this AMM) and Maintenance Manual (Heavy Maintenance) for ROTAX Engine Types 912 and 914 Series.
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  • Page 121: Check List For Periodic Inspections

    MAINTENANCE MANUAL STEMME S12 CHECK LIST FOR PERIODIC INSPECTIONS WARNING Switch OFF Master-Switch and Ignition for any maintenance work! NOTICE Read maintenance instructions in sections »6« and »7« before carrying out adjustments! Additionally to maintenance instructions, these sections indicate special maintenance intervals (2 years) allowable for some items of the Annual inspection program in the following check list.

  • Page 122: Wings And Fuel System Components In The Wing Center Section

    MAINTENANCE MANUAL STEMME S12 5.4.2 WINGS AND FUEL SYSTEM COMPONENTS IN THE WING CENTER SECTION Refer to Type and Subject of Inspection Sign-off Section 1. Check fuel system components at spar bridge of wing center 7.4.6 section. 2. Check vent line outlets at end 7.4.6...

  • Page 123: Forward Fuselage

    MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 12. Inspect L’Hotellier-connectors of aileron control rod accord- ing to manufacturer instruc- 7.3.2 tions (Annex A). Check un- loose-able fastening of safety pin. 13. Check bell-crank levers and adjacent components of wing 7.3.2...

  • Page 124: Cockpit

    MAINTENANCE MANUAL STEMME S12 5.4.4 COCKPIT Refer to Type and Subject of Inspection Sign-off Section 1. Inspect canopy for damage and proper function of locking mechanism, grease canopy locks. Check tension of the metal wire rope in locking 7.2.1 mechanism. Check and ad-...

  • Page 125: Center Fuselage (Except For Fairings)

    MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 12. Check nose-cone operation 7.4.13 (do not grease!). 13. Check condition, function and smooth operation of propeller 7.4.13 positioning. 14. Check condition and smooth operation of propeller brake assy.

  • Page 126: Tail Boom

    MAINTENANCE MANUAL STEMME S12 5.4.6 TAIL BOOM Refer to Type and Subject of Inspection Sign-off Section 1. Check elevator control lever in 7.3.3 lower vertical fin. 2. Check swaged terminals of all control rods in tail boom. 3. Check rudder control cables in 7.3.3...

  • Page 127: Fuel System Components In The Fuselage

    MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 9. Check backlash in fittings of horizontal stabilizer when 7.3.1 installed. 10. Check holes of water tank in the right shell of vertical tail. 7.3.1 Verify correct markings of quantity.

  • Page 128: Engine And Engine Mountings

    MAINTENANCE MANUAL STEMME S12 5.4.9 ENGINE AND ENGINE MOUNTINGS (1) - use of leaded fuel more than 30% of operation Refer to Type and Subject of Inspection Sign-off Section 1. Engine cleaning. 7.4.1.3 2. Visual inspection of engine 7.4.1.4 and auxiliaries.
  • Page 129 MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 18. Replace spark plugs. 7.4.1.14 19. Check spark plugs, Radiator can be removed (cam locks) if 7.4.1.14 required. 20. Check of spark plug 7.4.1.15 connectors for tight fit.

  • Page 130: Lubrication System

    MAINTENANCE MANUAL STEMME S12 5.4.10 LUBRICATION SYSTEM (2) - every 50 hours - use of leaded fuel more than 30% of operation Refer to Type and Subject of Inspection Sign-off Section 1. Check condition of oil radiator 7.4.2.1 and oil tank assemblies.

  • Page 131: Cooling System (Liquid Cooling, Ram Air Cooling)

    MAINTENANCE MANUAL STEMME S12 5.4.11 COOLING SYSTEM (LIQUID COOLING, RAM AIR COOLING) Refer to Type and Subject of Inspection Sign-off Section 1. Check condition of the cooling system assemblies: expansion 7.4.3 reservoir, refill container, over- flow container and radiator. 2. Carry out visual of leakage bore at the base of the water 7.4.3...

  • Page 132: Center Fuselage Fairing, Engine Cowlings And Firewall

    MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 2. Check condition of TCU and 7.4.7 waste-gate-servo assy. 3. Check sensors for oil pressure, oil temperature, cylinder cool- ant temperature, exhaust gas 7.4.7 temperature (if installed), fuel pressure and fire warning.

  • Page 133: Propeller

    MAINTENANCE MANUAL STEMME S12 5.4.15 PROPELLER Refer to Type and Subject of Inspection Sign-off Section 1. Visual inspection of load bear- 7.4.10 ing elements. 2. Check complete propeller as- 7.4.10 sembly. 3. Check rubber stops within the blades and on the hub for 7.4.10.3...

  • Page 134: Drive Shaft With Propeller Reduction Gear

    MAINTENANCE MANUAL STEMME S12 5.4.16 DRIVE SHAFT WITH PROPELLER REDUCTION GEAR Refer to Type and Subject of Inspection Sign-off Section 1. Check noise and backlash of propeller reduction gear (turn 7.4.12 propeller by hand). 2. Check condition of propeller reduction gear suspension and 7.4.12...

  • Page 135: Main Landing Gear

    MAINTENANCE MANUAL STEMME S12 5.4.17 MAIN LANDING GEAR Refer to Type and Subject of Inspection Sign-off Section 1. Inspect the main landing gear legs and trailing arms for de- 7.5.1 formation and possible cracks as an result of overloads. 2. Check the linear actuators for 7.5.1...

  • Page 136: Tail Wheel

    MAINTENANCE MANUAL STEMME S12 Refer to Type and Subject of Inspection Sign-off Section 14. Check landing gear position indication and warning (visual 7.5.1 and acoustic, during function test). 15. Check function of emergency 7.5.1 gear extension. 5.4.18 TAIL WHEEL Refer to...

  • Page 137: Electric System (Except For Engine And Tcu)

    MAINTENANCE MANUAL STEMME S12 5.4.20 ELECTRIC SYSTEM (EXCEPT FOR ENGINE AND TCU) Refer to Type and Subject of Inspection Sign-off Section 1. Check wiring of electric sys- 7.7.1 tem. 2. Check condition of all installed 7.7.1 electric devices. 3. Check condition and function 7.7.1...

  • Page 138: Completion Tasks

    MAINTENANCE MANUAL STEMME S12 5.4.22 COMPLETION TASKS Refer to Type and Subject of Inspection Sign-off Section 1. After end of maintenance work on the drive system - 7.1.4.17 Engine test run. 2. Check IDLE speed. 3. Check of oil quantity.

  • Page 139: Optional Equipment

    MAINTENANCE MANUAL STEMME S12 5.4.23 OPTIONAL EQUIPMENT WING FOLDING DEVICE The wing folding device itself is maintenance-free. The sliding surfaces should not be lubricated in order to avoid sticking of dirt, which could result in the formation of marks on the swivel arm and thus to wear.
  • Page 140 MAINTENANCE MANUAL STEMME S12 OXYGEN EQUIPMENT Refer to Type and Subject of Inspection Sign-off Section 1. Check oxygen equipment if in- stalled. Observe maintenance instructions of manufacturer (Refer to Annex A). CHAPTER-PAGE 5-38 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 141: Special Inspections

    »5.4.16« (as far as applicable). 3. After the propeller blades have been repaired or replaced, the drive system must be dy- namically balanced, as laid down in A17-10AP-V/2-E »Dynamic Propeller Balancing STEMME S10« (see Aircraft Maintenance Manual Annex A).

  • Page 142: Inspection Following Exceptional Events With Wing Folding Device

    MAINTENANCE MANUAL STEMME S12 5.5.3 INSPECTION FOLLOWING EXCEPTIONAL EVENTS WITH WING FOLDING DEVICE Collision of the spar stub of the outboard wing with an obstacle during taxiing or maneuvering in the hangar with the outboard wings folded: • Inspection of the wing ribs for crazing in the area of the screw-on surfaces for the folding device as well as inspection of the spar stubs and spar stub bolts for visual damage prior to the next flight.

  • Page 143: Maintenance Instructions, Tolerances, Adjustment Data For The Aircraft

    S12 Maintenance Manual and include further information about performing the inspections. TOWING ON GROUND, JACK POINTS AND LIFTING The S12 may only be towed in flight direction, since the tail wheel deflection is limited to 30° in both directions.
  • Page 144 0.15 m / 5.91 in and must be secured against displacement. The fuselage can be suspended or supported at these bolts. For rigging and derigging refer to the S12 Aircraft Flight Manual, chapter »4«. For transport refer to the S12 Aircraft Flight Manual, chapter »8«.

  • Page 145: Determination Of Empty Weight And Corresponding Center Of Gravity; Weight Limits

    This section provides procedures to determine aircraft empty weight, component weights and CG at empty weight and the certified weight and CG limits. To perform the inspection, the STEMME form »Weight and Balance Report« (form according to Annex D) should be used.
  • Page 146 MAINTENANCE MANUAL STEMME S12 Following an aircraft repair, painting or modification of equipment it always must be verified that component weights, empty weight and CG at empty weight are still within certified limits. If weight and arm of removed or installed equipment is known exactly, change of empty weight and CG can be calculated.
  • Page 147 »6.3.b« and »6.3.c«. Two different minimum seat loads depending on the loading conditions have to be determined and noted on the »Weight of Balance Report« (Annex D), the weighing logsheet in the S12 Aircraft Flight Manual section »6.3« and the placards on the center console: •...
  • Page 148 MAINTENANCE MANUAL STEMME S12 Figure 6.3.b Range of Empty Weight CG as a function of Empty Weight and Minimum Load for worst tail-boom (full water ballast and luggage compartment) CHAPTER-PAGE 6-6 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...
  • Page 149 MAINTENANCE MANUAL STEMME S12 Figure 6.3.c Range of Empty Weight CG as a function of Empty Weight and Minimum Load for no tail-boom loading (empty water ballast and luggage compartment) THE FOLLOWING WEIGHT LIMITS MAY NOT BE EXCEEDED UNDER NO CIRCUMSTANCES: •...

  • Page 150: Flight Control System

    MAINTENANCE MANUAL STEMME S12 FLIGHT CONTROL SYSTEM 6.4.1 DEFLECTION OF CONTROL SURFACES, CONTROL SYSTEM FRICTION, AND CONTROL FORCES After any adjustment or assembly work on the control system, control deflections, friction and forces in the control system must be measured.

  • Page 151: Friction In Control System

    MAINTENANCE MANUAL STEMME S12 6.4.1.2 FRICTION IN CONTROL SYSTEM MEASURING POINT At the operating lever / control stick, mid of the grip. If installed temporarily disconnect autopilot actuators. Elevator 5 ± 2 N (1.1 ± 0.45 lbf) Aileron N (3.4 lbf) +1.1...

  • Page 152: Weights And Moments Of Control Surfaces

    MAINTENANCE MANUAL STEMME S12 6.4.2 WEIGHTS AND MOMENTS OF CONTROL SURFACES After repair and re-painting of control surfaces, weights and rear hinge moments must be checked and confirmed to be within certified limits. If certified limits are exceeded, the manufacturer must be contacted.

  • Page 153: Lubrication

    MAINTENANCE MANUAL STEMME S12 LUBRICATION 6.5.1 GENERAL REMARKS LUBRICANTS For friction bearings “steel-on-steel” and roller bearings lubricants and oils based on MoS are recommended. For bearings containing brass, bronze or copper components, only MoS2-free lubricants and oils shall be used.

  • Page 154: Lubrication Plan

    MAINTENANCE MANUAL STEMME S12 6.5.2 LUBRICATION PLAN The lubrication points marked in the following figure should be checked and lubricated if required and during scheduled maintenance or rigging as indicated on the table below. Additional lubri- cation may be required for additional equipment, observe maintenance instructions in Annex A.

  • Page 155: Surface Of Composite Structures

    MAINTENANCE MANUAL STEMME S12 Position. Description Lubricant, Occasion and Remarks (See also section 6.5.1) Forward and rear horizontal tail Grease (any rigging and annually) fitting. L´Hotellier connection aileron Slightly grease only the ball (any rigging and control rod. annually), see also manufacturer instruction...
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  • Page 157: Drainage And Ventilation Holes

    MAINTENANCE MANUAL STEMME S12 DRAINAGE AND VENTILATION HOLES The following position plan shows positions of the drains and ventilation holes (except for propeller). Any drains and ventilation bores should be checked for blockage during any scheduled inspection. Figure: 6.7.a. Positions of Drainage and Ventilation Holes...
  • Page 158 MAINTENANCE MANUAL STEMME S12 NON-STANDARD TIGHTENING TORQUES INCLUDE THE FOLLOWING (FOR EXAMPLE) Item Designation Loctite Tightening Torque [Nm] [lbf ft] M8 connecting clutch and propeller without flange of the engine. M10 connecting clutch and flexible disk 25.8 (drive shaft). M10 connecting flexible disk and forked 25.8...

  • Page 159: Data For Assemblies / Equipment

    MAINTENANCE MANUAL STEMME S12 MAINTENANCE INSTRUCTIONS, TOLERANCES AND ADJUSTMENT DATA FOR ASSEMBLIES / EQUIPMENT AIRFRAME 7.1.1 WING Description: See section »3.1.1« Lubrication: See section »6.5« 7.1.1.1 CRACKS AND STRUCTURAL DAMAGE • Check wings for cracks and abnormal surface (local buckles, roughness, holes and delami- nation), especially near to force transmission points (fittings, control links, flap hinges) and at the division areas of inner and outer wing as well as of outer wing and wing extension.

  • Page 160: Flaps And Ailerons

    MAINTENANCE MANUAL STEMME S12 CLEARANCE OF OUTER WING TO WING EXTENSION ATTACHMENTS Front and rear bolts, axial: Maximum of 0.3 mm / 0.012 in each Front and rear bolts, radial Maximum 0.2 mm / 0.008 in each Main bolt, radial: Maximum of 0.15 mm / 0.006 in...

  • Page 161: Fuselage

    MAINTENANCE MANUAL STEMME S12 7.1.2 FUSELAGE Description: See section »3.1.2« Lubrication: See section »6.5« 7.1.2.1 CRACKS AND STRUCTURAL DAMAGE • Check forward fuselage and the tail boom for cracks and abnormal surface (local buckling, roughness, holes and delamination), especially at the connection points to the center steel frame, along the adhesive bindings of the tail boom and at the vertical tail root.

  • Page 162: Center Fuselage

    MAINTENANCE MANUAL STEMME S12 RENEWAL OF LOCKING SPRING OF NOSE-CONE HANDLE • Disassemble nose-cone operation. • Change both locking springs and reassemble. ADJUSTMENT OF ENGINE MASTER SWITCH • Remove left and right coverings of instrument panel. • Re-bend electrical contacts or change if necessary.

  • Page 163: Vertical Tail

    MAINTENANCE MANUAL STEMME S12 7.1.3.2 VERTICAL TAIL RUDDER ATTACHMENT AND FREE MOVEMENT • Check condition of rudder fittings (stainless steel), specially check lower fitting for cracks and deformation. • Check tight fit of screw connections and rivet connection of bearings, friction in bearings (observe section »6.5 Lubrication«) and backlash.

  • Page 164: Horizontal Tail

    MAINTENANCE MANUAL STEMME S12 7.1.3.3 HORIZONTAL TAIL • Check forward fitting for cracks and corrosion, tight fit of screw connection, smooth op- eration of spring bolt (observe section »6.5 Lubrication«), backlash of bolt and sufficient spring tension for safe locking.

  • Page 165: Cockpit

    7.2.1.2 TEST OF CANOPY EMERGENCY JETTISON Carry out jettisoning procedure as adopted from the instructions in the S12 Aircraft Flight Manual • Detach lateral gas springs from the canopy frame and remove gas springs from cockpit. • Support the canopy by two assistants standing to the right and to the left of the cockpit.

  • Page 166: Re-Installation Of The Canopy

    MAINTENANCE MANUAL STEMME S12 7.2.1.3 RE-INSTALLATION OF THE CANOPY • Unscrew the ball head bolted joint of the pneumatic springs which hold the canopy open. • Loosen the M8 nuts on the fuselage side of the canopy hinge by two turns.

  • Page 167: Equipment And Systems

    MAINTENANCE MANUAL STEMME S12 7.2.2 EQUIPMENT AND SYSTEMS 7.2.2.1 SEAT BELTS • Check condition and function of seat belts. • Check proper fastening of the belts to the attachment fittings. • Check attachment fittings for corrosion and cracks. • Check service life of seat belts according to manufacturer airworthiness limitation.

  • Page 168: Controls

    MAINTENANCE MANUAL STEMME S12 CONTROLS Description: See section »3.3« Lubrication: See section »6.5« Adjustment and Rated Data: See section »6.4« CONTROL RODS, GENERAL The control rods must be checked with special attention on the condition of their terminals. The swaged terminals of all control rods must be checked for longitudinal and radial cracks, all fork terminals for cracks, especially at the transition area of fork root and side frame.

  • Page 169: Controls In The Wing

    MAINTENANCE MANUAL STEMME S12 • Check control rods and bearings in the area of wing-to-center fuselage attachments; check condition of quick-release joints and securing of its spring bolts. 7.3.2 CONTROLS IN THE WING For checks and maintenance of the L`Hotellier Connections (aileron control rods at the inner-to-out- er wing division) refer to Annex A.

  • Page 170: Deflection Of Control Surfaces, Control System Friction, Control Forces

    MAINTENANCE MANUAL STEMME S12 7.3.4 DEFLECTION OF CONTROL SURFACES, CONTROL SYSTEM FRICTION, CONTROL FORCES For rated values of deflection, friction and forces related to controls of aileron, flaps, elevator, rudder and air brakes refer to section »6.4.1.1«, »6.4.1.2« and »6.4.1.3«.

  • Page 171: Power-Plant

    Maintenance) for ROTAX Engine Types ROTAX 912 and 914 Series«. Procedures affected by the modifications made for the S12 are included in this section. Otherwise a reference to the relevant section in the original Maintenance Manuals given above is indicated.

  • Page 172: Removal And Installation Of The Engine

    MAINTENANCE MANUAL STEMME S12 7.4.1.2 REMOVAL AND INSTALLATION OF THE ENGINE Removal • Disconnect battery. • Remove fire wall sheets. • Remove V-supports of the steel frame below the engine. • Loosen clutch on engine side and push it forward on the sliding joint.

  • Page 173: Cleaning Of The Engine

    Information provided by the »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series« will remain valid in an analogous sense. Spare parts for the modified waste-gate-control can only be supplied by STEMME. a) Check the components In particular make sure that the whole waste-gate-control (cable, waste-gate including the swiveling lever (1)) moves smoothly and easily.

  • Page 174: Check Of Gearbox

    MAINTENANCE MANUAL STEMME S12 Figure 7.4.1.7a Check of Waste Gate 7.4.1.8 CHECK OF GEARBOX See »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series«, section »12-20-00«, (Annex E). 7.4.1.9 INSPECTION OF THE MAGNETIC PLUG See »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series«, section 12-20- 00, (Annex E).

  • Page 175: Check Of Engine Wiring

    MAINTENANCE MANUAL STEMME S12 7.4.1.12 CHECK OF ENGINE WIRING • Check wiring in engine compartment for proper routing and support, tight connections and condition of cables. • Check wiring for mechanical damages (chafing, brittle parts, poor connections) and signs of overheating (observe section »5.2.4«).

  • Page 176: Test Run Of Engine

    MAINTENANCE MANUAL STEMME S12 7.4.1.17 TEST RUN OF ENGINE See »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series«, section 12-20-00, (Annex E). 7.4.1.18 INSPECTION OF ENGINE MOUNTINGS • Check upper (rear) and front (lower) engine mounting frames for damages. Repair damage to the paint and remove corrosion.

  • Page 177: Oil Level Check

    MAINTENANCE MANUAL STEMME S12 7.4.2.2 OIL LEVEL CHECK Oil specification : See section 3.4.14.3 See »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series«, section 12-20-00, (Annex E). CAUTION If the engine is operated with AVGAS, do not use fully synthetic motor oil.

  • Page 178: Flushing Of Cooling System

    MAINTENANCE MANUAL STEMME S12 • Check tight connections of flexible hoses and aluminum pipes. • Check routing of lines for clearance from hot parts, and for sufficient support of tubes. • Check condition, attachment and routing of drainage line from overflow container in landing gear bay.

  • Page 179: Ram Air Cooling

    MAINTENANCE MANUAL STEMME S12 7.4.3.4 RAM AIR COOLING • Check condition of composite distributor (plenum) on cylinder barrels • Check tight fit, routing and condition of air hose from distributor to aluminum coupling sheet. • Check condition and attachment of the sheet to the fuselage steel frame and condition of its rubber sealing to the RH cowling.

  • Page 180: Exhaust Headers

    REPLACEMENT OF HEAT INSULATION TAPE If required or at the latest after maximum 100 engine hours the heat insulation tape (type see section »3.4.5«, available from STEMME) must be replaced: • Remove spring clamps and insulation tape. • Fix beginning of new tape by means of a suitable glue.
  • Page 181 MAINTENANCE MANUAL STEMME S12 REPLACEMENT OF MUFFLER HEAT INSULATION • Remove upper heat protection steel sheet (M5 screw). • Remove end wall insulation (cut off securing wire). • Remove springs on muffler heat insulation. • Remove muffler insulation to the rear.

  • Page 182: Fuel System In The Wing

    • Loosen clamps of fuel lines and remove filters in LH and RH wing. • Install new filter using clamps of original. type (Spare parts available from STEMME.) Re-assemble the package after the planned maintenance the package in reverse order.

  • Page 183: Fuel System In The Fuselage

    MAINTENANCE MANUAL STEMME S12 7.4.6.2 FUEL SYSTEM IN THE FUSELAGE See also »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series”, section 12-20-00, subsection 2.3, (Annex E). • Check condition and function of quick release coupling in the main supply line above the feeder tank.

  • Page 184: Engine Controls / Monitoring

    MAINTENANCE MANUAL STEMME S12 See »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series«, section »12-20-00«, (Annex E). • Check condition, attachment and routing (clearance from hot surfaces) of drain lines from carburetor drip tray and airbox to outlets above lower cowl flap.
  • Page 185 MAINTENANCE MANUAL STEMME S12 CHECK OF TCU AND WASTEGATE SERVO • Check condition, attachment and wiring of the TCU. • Check pressure hoses (observe section »5.2.4«). • Check condition of the wastegate servo assembly. • Check condition of the bowden-cable driving the waste-gate.

  • Page 186: Fire Protection

    MAINTENANCE MANUAL STEMME S12 To perform the following check, remove instrument panel cover. The module is mounted on the electronics / CB plate on the RH side of the panel. Correct function can be examined by means of two LED´s mounted on the circuit board, visible through an opening in the module housing.

  • Page 187: Fire Protective Sleeves

    MAINTENANCE MANUAL STEMME S12 7.4.8.2 FIRE PROTECTIVE SLEEVES The fire protective sleeves must be checked for condition and complete cover of the fluid lines. Check routing, especially for kinks in fire protective sleeves, which might obstruct fluid flow in fluid lines covered.

  • Page 188: Propeller

    (fine pitch) or against direction of flight (coarse pitch). See also details in the S12 Aircraft Flight Manual, section »4 Daily Checks«. Adjustment of the propeller or its electric system may only be performed by the manufacturer or by qualified and authorized personnel.

  • Page 189: Adjustment And Inspection Results, Tolerances

    MAINTENANCE MANUAL STEMME S12 Balancing the variable pitch propeller or its assemblies may only be performed by the manufacturer or by an authorized and licensed FBO according to the specific instructions and using appropriate equipment. Balancing weights have to be applied for static or dynamic balancing. Their arrangement must be entered in the Rigging Report as laid down in the »Propeller Rigging Report«...

  • Page 190: Removal Of The Propeller Unit

    MAINTENANCE MANUAL STEMME S12 • Check propeller folding mechanism for ease of operation and restoring force. • Check propeller blade ventilation and drain holes at the blade tips, clean if necessary. If the ignition retarder module failed during engine start, the propeller must be checked for damage.

  • Page 191: Installation Of The Propeller Unit

    MAINTENANCE MANUAL STEMME S12 7.4.10.5 INSTALLATION OF THE PROPELLER UNIT • Clean and degrease the propeller and the propeller gearbox flange with an appropriate solvent. The torque is transmitted by friction fit, therefore, the surfaces must be even, clean and free from grease.

  • Page 192: Spring Tension Of The Propeller Folding Mechanism

    MAINTENANCE MANUAL STEMME S12 7.4.10.6 SPRING TENSION OF THE PROPELLER FOLDING MECHANISM • Check the spring pre-load for each blade: after the propeller has been installed, turn it until the leading edge of the (folded) lower propeller blade is in a horizontal position. The static holding force (not the lift-off force) on the rubber catch in this position must be 1.7 N ±...

  • Page 193: Checking Of Pitch Control And Adjusting The Variable Pitch Propeller

    MAINTENANCE MANUAL STEMME S12 7.4.10.7 CHECKING OF PITCH CONTROL AND ADJUSTING THE VARIABLE PITCH PROPELLER • The basic setting of the blade-angle is performed by the manufacturer or by a facility or Field Base Operator (FBO) authorized by the manufacturer to perform major repairs on the variable pitch propeller.

  • Page 194: General Aspects Of The Electrical Circuit

    MAINTENANCE MANUAL STEMME S12 7.4.10.8 GENERAL ASPECTS OF THE ELECTRICAL CIRCUIT An expansion element is supplied with an electric power of 50 W through a heating resistor. The supply period is determined mechanically by an adjustable end contact. Overheating is prevented by an NTC resistor in connection with an electronic control circuit.

  • Page 195: Drive Shaft System

    Manufacturer’s Instruction A17-10AP-V/2-E (see Annex A). The dynamic balancing must be recorded in Annex C of the S12 Maintenance Manual. 7.4.11 DRIVE SHAFT SYSTEM System description: See section »3.4.11«...

  • Page 196: Propeller Gearbox, Mounting And Support

    MAINTENANCE MANUAL STEMME S12 REMOVAL OF DRIVE SHAFT The propeller shaft can be removed together with propeller reduction gearbox and the propeller in one step: • Remove the nose-cone: Lift off left and right leg room coverings in the cockpit, loosen...
  • Page 197 MAINTENANCE MANUAL STEMME S12 • Check tight fit of propeller gearbox assy. in four rubber shock mounts on front fuselage frame. • Check weight balancing spring on propeller gearbox and its safety wire. • Check connection of propeller brake control cable through hole in front fuselage frame.

  • Page 198: Propeller Operation

    MAINTENANCE MANUAL STEMME S12 7.4.13 PROPELLER OPERATION System Description: See section »3.4.13« NOSE-CONE OPERATION • Check condition and proper installation of components. Check smooth operation of nose-cone handle. If required, clean nose-cone sliding guide with alcohol. NOTICE Never grease nose-cone PTFE sliding guide! PROPELLER POSITIONING •...

  • Page 199: Main Landing Gear

    MAINTENANCE MANUAL STEMME S12 LANDING GEAR 7.5.1 MAIN LANDING GEAR Description: See section »3.5.1« Adjustment data: See figure »3.5.1.a« Lubrication: See section »6.5« 7.5.1.1 GENERAL LANDING GEAR ASSY. • Check condition of landing gear legs and trailing links (cracks in paint indicate overloads;...

  • Page 200: Functional Test Of The Retractable Landing Gear

    MAINTENANCE MANUAL STEMME S12 BRAKE FLUID To check brake fluid level, remove the top of the brake cylinder. If required refill through the bleed valves on the brake calipers (refer to »7.5.1.5«). WARNING A rapid reduction of the brake fluid level indicates leakage of the system and must be investigated and eliminated before the aircraft returns to service.
  • Page 201 MAINTENANCE MANUAL STEMME S12 • Retraction of right landing gear leg:(independent from the left leg - for this purpose,first actuate left stop switch »retracted«, then disconnect the arm linking the operating cable to the left LG door - take care that the cable and arm do not jam as the right leg is retracted).

  • Page 202: Functional Check Of Emergency Undercarriage Extension

    MAINTENANCE MANUAL STEMME S12 7.5.1.3 FUNCTIONAL CHECK OF EMERGENCY UNDERCARRIAGE EXTENSION • Support the aircraft and landing gear up. • Landing gear switch “NEUTRAL”. • Actuate the EMERGENCY-UNDERCARRIAGE handles (in sequence 1-2). Actuating force is 100 - 200 N / 22.5 to 45 lbf. The landing gear legs must remain in the extended position (function of spring clips on the over-center struts).

  • Page 203: Tires, Condition And Inflation Pressure

    • While continually adding brake fluid to the brake fluid reservoir by using the refill-adapter (Stemme P/N: 00FO-B17) as required; pump the brake fluid through the hydraulic brake system by operation of the RH brake lever until the brake fluid passing through the trans- parent flexible hose at the bleed valve of the LH brake caliper is free of bubbles.

  • Page 204: Tail Wheel

    • Remove transparent flexible hose and check final brake fluid level at brake fluid reservoir. • Perform functional check of brake system in accordance with pre-flight check, described in the S12 Aircraft Flight Manual, chapter »4«. 7.5.1.6 REPLACEMENT OF BRAKE LINING The linings must be replaced at the latest shortly before the attachment rivets are exposed.

  • Page 205: Flight Control Instruments And Pitot And Static Pressure System

    MAINTENANCE MANUAL STEMME S12 • Check friction damping of tail wheel: If pushed to its upper stops (under load) the fork must show a heavy friction against turning. • Check smooth steering of the fork if hanging free. • Check axial and radial backlash of fork in its bearings (no diametrical backlash or tilting due to worn out upper bearing, sufficient clearance for rudder control when tail is lifted).

  • Page 206: Calibration Of Stall Warning System (Optional)

    MAINTENANCE MANUAL STEMME S12 7.6.1 CALIBRATION OF STALL WARNING SYSTEM (OPTIONAL) IN-FLIGHT CALIBRATION • Fly with a center of gravity position in the rear range with a total weight of 900 kg / 1985 lb. • Configuration for the calibration: Wing flap position 0°, landing gear and air brakes retracted, throttle 0%, propeller pitch T/O, wings level, not above 1000 m / 3300 ft MSL.

  • Page 207: Electrical System

    MAINTENANCE MANUAL STEMME S12 ELECTRICAL SYSTEM Description: See section »3.7« and »Maintenance Manual (Line Maintenance) for ROTAX Engine Type 914 Series« (Annex E). 7.7.1 GENERAL • Check wiring of entire electric system (observe section »5.2.4«). Specially check cable routing for sufficient supports, for chafing in the area of penetrations of cable (e.

  • Page 208: Grounding

    MAINTENANCE MANUAL STEMME S12 7.7.3 GROUNDING • Check condition of cables and connections and tight fit of main grounding cable: Battery to engine suspension frame and grounding cable on LH engine suspension shock mount. • Check condition of cables and connections and tight fit of grounding cables on fuel pumps.

  • Page 209: Communication And Navigation Equipment

    If equipment will be installed which is not listed in the S12 Maintenance Manual, prior to the instal- lation compliance with the relevant airworthiness requirements must be shown to the responsible aviation authority (i.e.
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  • Page 211: List Of Placards And Their Positions

    NOTICE The units of limitations shown in the following placards must be adapted depending on the in- stalled instrumentation and nationality. The values shown in chapter »2« of the S12 AFM apply. Affected placards are marked with *. PLACARDS IN THE COCKPIT, FRONT...
  • Page 212 MAINTENANCE MANUAL STEMME S12 PLACARD LOCATION/REMARKS On the instrument panel next to the trim indication display. On top of the shaft tunnel cover between gas and chock lever. (Nationality and registration) On the instrument panel. Next to the fuel diff. pressure indication display.
  • Page 213 MAINTENANCE MANUAL STEMME S12 PLACARD LOCATION/REMARKS Next to the flap lever of the pilot and copilot seat. The placard is illustrated in reduced scale. PLACARD LOCATION/REMARKS a) Handles: Next to the canopy jettison knob in the lower center part of the instrument panel.
  • Page 214 MAINTENANCE MANUAL STEMME S12 PLACARD LOCATION/REMARKS On the right side of the shaft tunnel cover near the copilot air brake lever and on the left cockpit side wall near the pilot air brake lever. On the top of the pedal adjustment knob for the pilot and the copilot seat.
  • Page 215 MAINTENANCE MANUAL STEMME S12 PLACARD LOCATION/REMARKS Below the fuel tank selector switch in the lower center part of the instrument panel. Next to the selector switch for the microphone / headset. On the top of the pilots control sticks around the trim operation switch.

  • Page 216: Placards In The Cockpit, Rear

    MAINTENANCE MANUAL STEMME S12 PLACARDS IN THE COCKPIT, REAR PLACARD LOCATION/REMARKS a) Descriptions / Displays: On the flap of the rear storage compart- ment in the center tunnel cover*. On the top edge of the luggage compart- ment behind the pilot and copilot seats*.

  • Page 217: Placards On Fuselage

    MAINTENANCE MANUAL STEMME S12 PLACARD LOCATION/REMARKS c) Switches: Label for every additional switch, naming so Next to the corresponding switch. that the function of the switch is comprehen- sible clearly comprehensible to the crew. PLACARD LOCATION/REMARKS d) Fuses / Circuit breakers: Label for every additional fuse, naming so Next to the corresponding fuse.
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  • Page 219: Equipment

    MAINTENANCE MANUAL STEMME S12 EQUIPMENT MINIMUM EQUIPMENT LIST NOTICE This Minimum Equipment List (MEL) does not comply with a Master Minimum Equipment List (MMEL) as part of the operational suitability data. TC No., Range, Subject Manufacturer Type Specification No. Remarks...
  • Page 220 MAINTENANCE MANUAL STEMME S12 TC No., Range, Subject Manufacturer Type Specification No. Remarks Ludolph FK16 10.410/3 Ludolph 10.410/1 Compass Hamilton HI400 TSO C7c Type 1 Precision Aviation PAI-700 Inc. Tachometer ROTAX 966 403 up to 7000 min-1 Engine hour meter...

  • Page 221: Supplementary Equipment

    Reserved ADDITIONAL EQUIPMENT AND SYSTEMS Different equipment and systems may be installed in the motorglider S12, which are not part of the minimum or supplementary equipment and which normally are not series standard. Basically the cases »Additional Equipment« and »Optional Systems« have to be distinguished and treated differently.
  • Page 222 MAINTENANCE MANUAL STEMME S12 Subject Manufacturer Type TC No., Range, Specification No. Remarks Mechanical various various Variometer All approved TSO/ VHF-COM various various ETSO equipment. And mechanically PS Engineering PM 1000 II identical, all equip- TELEX Pro Com 4 ment, which is per-...

  • Page 223: Optional Systems

    Flight Manual are provided. Information required for maintained airworthiness are published as maintenance instructions, to be inserted in the Annex A of the S12 Aircraft Maintenance Manual and added to the list of maintenance instructions on the cover sheet of Annex A.
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  • Page 225: List Of Special Tools

    MAINTENANCE MANUAL STEMME S12 LIST OF SPECIAL TOOLS The following list includes tools, which may be required for maintenance of the S12 in addition to standard tools normally available in facilities performing maintenance on light aircraft. • Precision protractor for propeller blade adjustment.
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  • Page 227 • Manufacturer’s maintenance documents for all instruments specified in the equipment list for the aircraft serial number indicated on the title page. • Procedural instruction »Dynamic balancing of the STEMME S 10 motorglider propeller in the S10-V and S10-VT models« A17-10AP-V/2-E.
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  • Page 229 Company for the STEMME aircrafts. • Instructions for the maintenance of “L’Hotellier” ball and swivel joints. • Maintenance instructions by STEMME as entered in the list below. This list must comprise at least those Maintenance Instructions relating to the additional equipment installed (refer to the record of accomplished SB’s/AD’s under Annex B).
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  • Page 231: Annex B: Service Bulletins, Airworthiness Directives

    THIS ANNEX COMPRISES • The »List of Airworthiness Directives and Service Bulletins« issued by the manufacturer for the aircraft type STEMME S10 (Document No. A31-10-000). • The record of accomplished SB’s / AD’s for this serial number. • All Service Bulletins already accomplished as well as those still to be accomplished.
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  • Page 233: Annex C: Documents (Inspection And Operation Reports)

    Those documents are listed in the table below. CAUTION Upon any Repair or Inspection the S12 Aircraft Maintenance Manual must be submitted including a complete Annex of documents, to allow inspection reporting and continuing of operative doc- umentation in accordance with the rules.
  • Page 234 MAINTENANCE MANUAL STEMME S12 Document always if any Flight Report related to the production inspection or to the last inspection for Continuing Airworthiness. List of Constructional Deviations (“minor modifications”). Latest Energy Balance Report following installation of Additional Instrumentation according section »9.3.1«...
  • Page 235 MAINTENANCE MANUAL STEMME S12 ANNEX D: MAINTENANCE AND INSPECTION FORMS This section provides patterns of maintenance and inspection forms, relevant to maintenance according to sections »6« and »7«. CHAPTER-PAGE D-1 DOCUMENT NUMBER: AMENDMENT: 00 L500-912.820 ISSUE JUL 20, 2016 DATE: --...
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  • Page 237 MAINTENANCE MANUAL STEMME S12 Weight and balance report Document Number 1001-12-S12-2 STEMME S12 Page 1 (of 2) Serial Number: Registration: Relevant Equipment List: Order No.: This Weight and Balance Report was drawn up without weighing. Any weighing data have been taken from the Weight and Balance Report dated ___________ and if need be corrected according to point 4.2.
  • Page 239 MAINTENANCE MANUAL STEMME S12 Weight and balance report Document Number 1001-12-S12-2 STEMME S12 Page 2 (of 2) 4. Determining of Empty Weight Center of Gravity 4.1. After Weighing: ⋅ [mm / in.]*** ⇒ mm / in. 4.2. After Changes, without Weighing: Following changes have been made on the powered glider: Install.

  • Page 241: Control Surface Deflections

    + 10° neutral [+1.22 ± 0.16] [+1.22 ± 0.16] +51 ± 4 +51 ± 4 L (+16°) neutral [+2 ± 0.16] [+2 ± 0.16] erstellt / bearbeitet: Freigabe: Ausgabe vom: ersetzt Ausgabe vom: Nicht belegt! Rutz 01.08.2011 1001-08-S12-2_Rigging_S12.doc-1/17.08.16 15:33/23.03.17 13:08...
  • Page 243 Control Surface Masses and Hing Moments Report Document No.: 1001-12-S12-6 STEMME S12 Page 1 (of 1) Serial No.: Registration: Order No.: Mass of Control Surface Hinge Moment of Control Surface Force at trailing edge Rated Reading * Rated Reading *...
  • Page 245 Document number: Propeller Adjustment Report 0901-05-S10-7 DE.21G.0068 STEMME 11AP-V Page: 1 (of 2) Serial No. of Propeller: Order No.: Drawing Up Reason: Conformity Inspection Repair or Inspection. Date of Finding Report: Other: No. Item or inspection to be performed / inspection results...
  • Page 247 Document number: Propeller Adjustment Report 0901-05-S10-7 DE.21G.0068 STEMME 11AP-V Page: 2 (of 2) Item or inspection to be performed / inspection results performed checked Propeller all up weight [g] (incl. front cover) Clearance in blade bearings [mm / in.] (Measured in direction of rotation axle) Blade 1 Blade 2 („red“...
  • Page 249 All measured data are in the permissible range and comply with the Production and Maintenance Instructions for the control system. Strausberg, Site, date Stamp Sign Inspector erstellt / bearbeitet: Freigabe: Ausgabe vom: ersetzt Ausgabe vom: Nicht belegt! Rutz 01.08.2011 1001-08-S12-2_Rigging_S12.doc-2/17.08.16 15:33/23.03.17 13:08...
  • Page 251 Type 914 Series« (current issue). The S12 Aircraft Maintenance Manual, is related to the motorglider including the modified engine ROTAX 914 F2/S1. This S12 Aircraft Maintenance Manual is subject to changes by the manufacturer of the original engine, ROTAX. CHAPTER-PAGE E-1...
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  • Page 253: Annex F: Technical Drawings

    MAINTENANCE MANUAL STEMME S12 ANNEX F: TECHNICAL DRAWINGS This section provides technical drawings and electric wiring diagrams relevant for maintenance. CHAPTER-PAGE F-1 DOCUMENT NUMBER: AMENDMENT: 00 L500-912.820 ISSUE JUL 20, 2016 DATE: --...

  • Page 254: Jul 20, 2016

    MAINTENANCE MANUAL STEMME S12 THIS PAGE IS INTENTIONALLY LEFT BLANK CHAPTER-PAGE F-2 AMENDMENT: 00 DOCUMENT NUMBER: DATE: -- L500-912.820 ISSUE JUL 20, 2016...

  • Page 255: A) Flight Controls: Pitch Control And Trim

    A) FLIGHT CONTROLS: PITCH CONTROL AND TRIM...

  • Page 257: B) Flight Controls: Lateral Control (Wing, Flap, Aileron)

    B) FLIGHT CONTROLS: LATERAL CONTROL (WING, FLAP, AILERON)

  • Page 259: C) Flight Controls: Airbrake Control

    C) FLIGHT CONTROLS: AIRBRAKE CONTROL...

  • Page 261: D) Flight Controls: Rudder Control

    D) FLIGHT CONTROLS: RUDDER CONTROL...

  • Page 265: E) Propulsion System

    E) PROPULSION SYSTEM...

  • Page 267: F) S12 Main System - Dc Generation

    F) S12 MAIN SYSTEM - DC GENERATION Instrument Panel Main System Box Engine Cowl Charge Socket Ext Alt Lamp Ext Alt Field Volt/Ampere MAIN BUS - INSTRUMENT PANEL PP1F VV10F Solar Cells AVIONICS BUS - INSTRUMENT PANEL PX30P PX5F PX3P...

  • Page 269: G) S12 Main System - Landing Gear

    G) S12 MAIN SYSTEM - LANDING GEAR refer to: P308-124.915 S12 Main System - Lighting Instrument Panel Control Linkage Landing Gear Compartment Compartment refer to: P308-124.910 L/G Power L/G Ctrl S12 Main System - MAIN BUS - INSTRUMENT PANEL GA21F...

  • Page 271: H) S12 Main System - Electrical Trim

    H) S12 MAIN SYSTEM - ELECTRICAL TRIM Trim System Instrument Panel MAIN BUS - INSTRUMENT PANEL refer to: P308-124.910 S12 Main System - DC Generation CT10P CT1P white CT11Ps orange green blue black Trim Trim Indicator Control Trim Servo Pilot Stick...

  • Page 273: I) S12 Main System - Autopilot

    I) S12 MAIN SYSTEM - AUTOPILOT Instrument Panel AVIONICS BUS - INSTRUMENT PANEL refer to: P308-124.910 S12 Main System - 16pol 11 12 DC Generation Right Stick: Prepare wires for AP Disengage EFIS Autopilot in copilot stick connector AP74 AP20P...

  • Page 275: J) S12 Main System - Fire Warning

    J) S12 MAIN SYSTEM - FIRE WARNING Instrument Panel Fire Warning MAIN BUS - INSTRUMENT PANEL refer to: P308-124.910 S12 Main System - DC Generation WG10P WG12P Molex 3pol Warning Light "FIRE" Horn Test black Button Engine Compartment 160°C 160°C...

  • Page 277: K) S12 Main System - Lighting

    K) S12 MAIN SYSTEM - LIGHTING L/H Wing LC30FN Inner Wing Outer Wing Outer Wing Extension Winglet Lamp Housing POS r POS w Engine Compartment Instrument Panel 7 Channel MOSFET-Box Landing Lights Light Landing Light Light Power 2b 2a 2b 2a...

  • Page 279: L) Transponder And Traffic Display

    GARMIN GPSMAP695 VERIFY COLOUR TO SIGNAL ASSIGNMENT WITH GARMIN MANUAL Date Name Title drawn 27.03.17 Gulbe Transponder and Traffic Display checked 27.03.17 Baum S12 Ultimate USA Blatt Doc Number P061-2017-039 P061-2017-002 GND 4VN P308-124918 P061-2016-079 DE.21G.0068 EASA 21J.250 Rev. Change...

  • Page 281: M) S12 Main System - Communication Radio

    M) S12 MAIN SYSTEM - COMMUNICATION RADIO Standard Headset Jacks CFG 1: STD MIC + HEADPHONE Mic switch black 10VV Instr. lighting 4VV-1 white COPILOT CFG 2: DYN MIC + SPEAKER black Backlight + white +13,75V +13,75V black black MIC STD 2 HI...

  • Page 283: N) S12 Engine System - Dc Generation

    N) S12 ENGINE SYSTEM - DC GENERATION Instrument Panel Engine System Box Volt/Ampere ENGINE BUS - INSTRUMENT PANEL KA1F VV2F PX5F PX3P refer to: P308-124.910 refer to: P308-124.921 S12 Main System - S12 Engine System - Shunt PX30P PX3Ps DC Generation...

  • Page 285: O) S12 Engine System - Engine Monitoring And Control

    O) S12 ENGINE SYSTEM - ENGINE MONITORING AND CONTROL REV 02 Instrument Panel Center Console Oil P Oil T CHT L CHT R FuelPress Tachometer Stall warning Ignition Retarder Ignition PWR IN Hobbs ENGINE BUS - INSTRUMENT PANEL Hobbs refer to: P308-124.917...

  • Page 287: P) S12 Engine System - Fuel Pumps And Indication

    P) S12 ENGINE SYSTEM - FUEL PUMPS AND INDICATION Instrument Panel Fuel L Fuel R Fuel Flow Low Fuel ENGINE BUS - INSTRUMENT PANEL 28-40-01 28-40-02 28-40-05 28-40-10 Auxiliary Pump Auxiliary Pump 28-40-03 28-40-04 28-40-05 Indication Switch yellow green 2b 2a...

  • Page 289: Q) S12 Engine System - Propeller Control

    Q) S12 ENGINE SYSTEM - PROPELLER CONTROL Engine Compartment Instrument Panel 7 Channel MOSFET-Box ENGINE BUS - INSTRUMENT PANEL Prop. Pitch Power green Propeller Pitch Indication Module refer to: P308-124.920 S12 Engine System - DC Generation ENGINE BUS - SYSTEM BOX...

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