BRM Aero Bristell B23-915 Maintenance Manual Supplement
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BRM Aero Bristell B23-915 Maintenance Manual Supplement

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Airplane Maintenance Manual Supplement
Bristell B23-915 model
Doc. N°
ADxC-73-003-AMM Supplement Edition 1.0
Supplementing ADxC-73-001-AMM
The technical content of this document is approved under the authority of the DOA ref. EASA.21J.411
Issue: 09.12.2021
Chapter 00 Page 1

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  • Page 1 Airplane Maintenance Manual Supplement Bristell B23-915 model Doc. N° ADxC-73-003-AMM Supplement Edition 1.0 Supplementing ADxC-73-001-AMM The technical content of this document is approved under the authority of the DOA ref. EASA.21J.411 Issue: 09.12.2021 Chapter 00 Page 1...
  • Page 2 B23-915 Airplane Maintenance Manual Bristell Chapter 00 supplement Intentionally left blank Chapter 00 Page 2 Issue: 09.12.2021...
  • Page 3 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 00 Amendments Issue Date Revised pages Description Edition 1.0 09.12.2021 first issue (DC-003) Issue: 09.12.2021 Chapter 00 Page 3...
  • Page 4 B23-915 Airplane Maintenance Manual Bristell Chapter 00 supplement List of Service Bulletins SB No Date Title Affected AD (EASA) Serial no.’s Retrofit of air tow hook to All SN ADxC-73-SB-011 09.12.2021 B23-915 B23-915 Chapter 00 Page 4 Issue: 09.12.2021...
  • Page 5 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 00 List of Effective Pages Date Rev. Date Rev. 09.12.2021 09.12.2021 1-10 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 1-10 09.12.2021 1-16 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021 09.12.2021...
  • Page 6 B23-915 Airplane Maintenance Manual Bristell Chapter 00 supplement Table of Contents Chapter Title Introduction Description Airworthiness Limitations Inspection and Maintenance Leveling and Weighing Placards and Markings Servicing Standard Practices - Airframe Air Conditioning Electrical Power Fuel Propeller Power Plant Engine Engine Control and Fuel Indicating- Ignition Engine Indicating...
  • Page 7 01-30 Address ..................3 01-00 General BRM Aero, s.r.o., the manufacturer of BRISTELL B23 airplanes, provides in accordance with the CS23 Amdt. 5 (AMC3 - CS-VLA) airworthiness requirements, information necessary to maintain airworthiness of BRISTELL B23-915 model airplanes. This Maintenance Manual contains technical description of the design...
  • Page 8 BRM AERO BRISTELL B23 Aircraft Maintenance Manual (referred to as main manual) BRISTELL B23 Aircraft Flight Manual BRISTELL B23-915 Aircraft Flight Manual supplement ROTAX Operator's Manual for ROTAX 915 series engine • OM-915 i A Maintenance Manual (line) for ROTAX 915 series engine •...
  • Page 9 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 01 01-30 Address BRM AERO, s.r.o. Address: Letecká 255 686 04 Kunovice Czech Republic Phone: + 420 773 984 338 E-mail 1: info@brmaero.com E-mail 2: aero.brm@gmail.com Web: http://www.brmaero.com or for occurrence reporting Aircraft Design Address: Reichensteinstr.
  • Page 10 B23-915 Airplane Maintenance Manual Bristell Chapter 01 supplement Intentionally left blank Chapter 01 Page 4 Issue: 09.12.2021...
  • Page 11 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 03 Description Table of Contents Chapter Title Page 03-10 Change Description................. 1 03-10 Change Description The goal of the design change DC-73-003 for the Bristell B23 is to implement the more powerful Rotax 915 engine into the B23 airframe.
  • Page 12 B23-915 Airplane Maintenance Manual Bristell Chapter 03 supplement Intentionally left blank Chapter 03 Page 2 Issue: 09.12.2021...
  • Page 13 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 04 Airworthiness Limitations The Airworthiness limitations Section is approved, and variations must also be approved. Table of Contents Chapter Title ................... Page 04-10 Life Limited Components..............2 04-10-01 Class I Parts Limitations ..............2 Issue: 09.12.2021...
  • Page 14 B23-915 Airplane Maintenance Manual Bristell Chapter 04 supplement 04-10 Life Limited Components 04-10-01 Class I Parts Limitations The following parts must be replaced or inspected as described below at the intervals specified in Table 1. Inspection for welded steel components must include dye-penetrant or similar method.
  • Page 15 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 04 Mandatory Inspection procedure for Class I limited parts as per Table 1 ………………… ………… Aircraft S/N.: Total flight hours: ………………… ………… Registration mark: No. of takeoffs: Prescribed works Made by Checked by...
  • Page 16 B23-915 Airplane Maintenance Manual Bristell Chapter 04 supplement Intentionally left blank Chapter 04 Page 4 Issue: 09.12.2021...

  • Page 17: Table Of Contents

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 05 Inspection and Maintenance Table of Contents Chapter Title Page 05-00 Standard Practice ................2 05-10 Time Limits ..................3 05-10-01 Overhaul Schedule ................3 05-10-02 Replacement Schedule ............... 3 05-20 Scheduled Maintenance ..............4 05-20-01 Lubrication Plan ................

  • Page 18: Standard Practice

    B23-915 Airplane Maintenance Manual Bristell Chapter 05 supplement 05-00 Standard Practice For removing/installing the upper cowling: ▶ Open all camlock quick connector ▶ Pull up and forward to pass the form-fit of the intercooler air inlet ▶ The air duct on intercooler is not attached to the engine or airframe and can be removed without tools ▶...

  • Page 19: Time Limits

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 05 05-10 Time Limits For Information about life limitation of installed avionics/equipment 01-20 Related Publications not listed herein refer to Chapter 05-10-01 Overhaul Schedule Items shown here must be overhauled at the times indicated.

  • Page 20: Scheduled Maintenance

    B23-915 Airplane Maintenance Manual Bristell Chapter 05 supplement 05-20 Scheduled Maintenance 05-20-01 Lubrication Plan Every 100 Unit Area of lubrication Lubricant hours Throttle control cable on the inlet into Engine Engine oil terminal (in the engine compartment). If towing system installed: Every 100 Unit Area of lubrication...

  • Page 21: Inspection After The First 25 Flight Hours

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 05 05-20-02 Inspection after the first 25 Flight Hours ………………… ………… Aircraft S/N.: Total flight hours: ………………… ………… Registration mark: No. of takeoffs: Prescribed works Made by Checked by Engine and Propeller List of performed operations for engine is shown in...

  • Page 22: Periodical Inspection After 50 Flight Hours

    B23-915 Airplane Maintenance Manual Bristell Chapter 05 supplement 05-20-03 Periodical Inspection after 50 Flight Hours ………………… ………… Aircraft S/N.: Total flight hours: Registration mark: ………………… No. of takeoffs: ………… Made by Prescribed works Checked by Engine and Propeller Check the exhaust system (and its attachment) for occurrence of cracks on the exhaust system and on welds (see Chapter 78-00 Check).

  • Page 23: Annual Periodical Inspection Or Inspection After 100 Flight Hours

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 05 05-20-04 Annual Periodical Inspection or Inspection after 100 Flight Hours ………………… ………… Aircraft S/N.: Total flight hours: Registration mark: ………………… No. of takeoffs: ………… Prescribed works Made by Checked by AIRFRAME Preparation Perform aircraft daily inspection and engine start up, run up and shut down per AFM.
  • Page 24 B23-915 Airplane Maintenance Manual Bristell Chapter 05 supplement Prescribed works Made by Checked by Check condition and integrity of electrical fuel pumps and hoses in the fuel pump compartment Check tightness and condition of fuel pumps for occurrence of cracks on the pump body (see Chapter 28-20-01 Check) Drain fuel tanks and inspect fuel strainer filter in fuel tank by borescope for dirt and obstructions - every 5 years only -.
  • Page 25 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 05 Prescribed works Made by Checked by Finalization Close all access hatches, remount fairings and cowling Perform ground run and check flight Notes: Date: ......Signature: ......Issue: 09.12.2021 Chapter 05 Page 9...
  • Page 26 B23-915 Airplane Maintenance Manual Bristell Chapter 05 supplement Intentionally left blank Chapter 05 Page 10 Issue: 09.12.2021...
  • Page 27 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 08 Leveling and Weighing Table of Contents Chapter Title Page 08-10 Weighing and Balancing ..............1 08-10-02 Weight and Balance Envelope Limits ..........1 08-10 Weighing and Balancing The weight and balance limits and procedures of the aircraft is not affected by the change.
  • Page 28 B23-915 Airplane Maintenance Manual Bristell Chapter 08 supplement Intentionally left blank Chapter 08 Page 2 Issue: 09.12.2021...
  • Page 29 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 11 Placards and Markings Table of Contents Chapter Title Page 11-00 General ..................1 11-00 General Surface paint is not affected by the change. For placards and markings refer to flight manual ADxC-73-003-AFM.
  • Page 30 B23-915 Airplane Maintenance Manual Bristell Chapter 11 supplement Intentionally left blank Chapter 11 Page 2 Issue: 09.12.2021...
  • Page 31 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 12 Servicing Table of Contents Chapter Title Page 12-10 Replenishing ................... 2 12-10-30 Coolant ..................... 2 Refilling Coolant .................... 2 12-30 Unscheduled Servicing ..............2 12-30-31 Air Filter .................... 2 Cleaning ......................2 Issue: 09.12.2021...
  • Page 32 The expansion tank (spider) is not conforming to the Rotax IPC and B23-915 specific part (71B520020N) is installed. For spare part BRM Aero must be contacted. Refill coolant into the expansion tank in the engine compartment. In addition to this there is an overflow bottle which collects coolant in case of engine overheating and is attached to the firewall.
  • Page 33 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 20 Standard Practices - Airframe Table of Contents Chapter Title Page 20-50 Adjustments and Tests ..............1 20-50-01 Control Surface Deflections ............... 1 20-50 Adjustments and Tests ..............1 20-50-01 Control Surface Deflections ............... 1...
  • Page 34 B23-915 Airplane Maintenance Manual Bristell Chapter 20 supplement Intentionally left blank Chapter 20 Page 2 Issue: 09.12.2021...
  • Page 35 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 21 Air Conditioning Table of Contents Chapter Title Page 21-00 General ..................1 21-40 Heating ..................2 21-00 General Changes to the heating system introduced by DC-003 are described in the following: Issue: 09.12.2021...
  • Page 36 B23-915 Airplane Maintenance Manual Bristell Chapter 21 supplement 21-40 Heating Cockpit heating is ensured by hot air from the heat exchanger (see Fig. 3). The heat exchanger (3) is located on the muffler (2). Ambient inlet air (1) taken by the muffler is heated in the heat exchanger and supplied through heating flap (6) located on the firewall into the cockpit by air hose (2).
  • Page 37 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 24 Electrical Power Table of Contents Chapter Title Page 24-00 General ..................2 24-30 DC Generation ................3 24-30-01 Internal Generators ................3 24-30-02 Auxiliary Alternator ................3 24-60 DC Electrical Load Distribution ............4 24-60-01 Switches and Circuit Breakers ............

  • Page 38: General

    B23-915 Airplane Maintenance Manual Bristell Chapter 24 supplement 24-00 General The airplane is equipped with 14V DC electrical installations with grounded negative pole. The primary DC electrical sources are two internal AC generators (control only internally by the ECU/EMS) in combination with an external alternator.

  • Page 39: Dc Generation

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 24 24-30 DC Generation 24-30-01 Internal Generators The Rotax 915 iSc3A engine is equipped with two internal generators (GEN A and GEN B) supplying the Engine management System (EMS) and the airframe with power (management of electrical power distribution of GEN A &...

  • Page 40: Dc Electrical Load Distribution

    B23-915 Airplane Maintenance Manual Bristell Chapter 24 supplement 24-60 DC Electrical Load Distribution 24-60-01 Switches and Circuit Breakers The switches serve for switching ON/OFF individual electrical circuits. There are two kinds of switches: Switches–Circuit Breakers switching ON/OFF and protecting the electrical circuit from •...

  • Page 41: Fuses

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 24 AUX PUMP AUX fuel pump switch DAY/NIGHT Preset for LED brightness Alternative power supply for BACK PWR engine via battery & ALTC Backup Battery for G3X system BCK-BAT and lights Dimmer Rotating knob dimming int. light...
  • Page 42 B23-915 Airplane Maintenance Manual Bristell Chapter 24 supplement XPDR Transponder USB-2 USB plug (PED power) HEADSET Headset power supply (Bose) Rear view camera Chapter 24 Page 6 Issue: 09.12.2021...
  • Page 43 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 28 Fuel Table of Contents Chapter Title Page 28-00 General ..................2 Checking Fuel System Tightness ..............3 28-10 Storage ..................4 28-10-01 Fuel Tank ..................4 28-20 Distribution ..................6 28-20-01 Electric Fuel Pump ................7 Check ......................

  • Page 44: General

    B23-915 Airplane Maintenance Manual Bristell Chapter 28 supplement 28-00 General The fuel system of Bristell B23 airplane consists of the following parts: two fuel tanks, fuel tubing, dual selector valve, main and aux fuel pump (electric), coarse and fine fuel filter, fuel level sensor, fuel pressure sensor and drain valves on the fuel tanks.

  • Page 45: Checking Fuel System Tightness

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 28 Checking Fuel System Tightness NOTE Tightness is checked by pressurized air or fuel. When performing a specific tightness check, outside temperature fluctuations must not be bigger than ±13°C (8°F). Reseal found out leakage by a suitable method –...

  • Page 46: Storage

    B23-915 Airplane Maintenance Manual Bristell Chapter 28 supplement 28-10 Storage Fuel is stored in airplane in two fuel tanks. The fuel tanks are integrated part of the wing from Aluminum sheet and their volume is standardly 60 liters (15.85 US gal, 13.2 UK gal) each. Figure 2 Storage Item...
  • Page 47 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 28 Figure 3 Fuel Tank (left) Item Description Item Description Pick-up line Fuel level sender Drain valve Issue: 09.12.2021 Chapter 28 Page 5...

  • Page 48: Distribution

    B23-915 Airplane Maintenance Manual Bristell Chapter 28 supplement 28-20 Distribution Fuel flows from the tanks through the pick-up line (4, Figure 4) and fuel lines to the dual fuel selector valve (3), actuated by the fuel selector handle (1) over the handle extension (2). From the fuel selector valve the fuel is filtered in the coarse fuel filter (5) and led to the fuel pump assy (main and aux;...

  • Page 49: Electric Fuel Pump

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 28 Fuel pressure sensor Fine filter bypass (w. check valve) Fuel fine filter High pressure fuel feed line Return fuel line (from engine) Fuel return bypass (w. check valve) Fuel return lines to tanks...

  • Page 50: Fuel Drain

    B23-915 Airplane Maintenance Manual Bristell Chapter 28 supplement Item Description Item Description Fuel tank Pickup-line Clamp Fuel hose Return line Fuel level sensor 28-20-03 Fuel Drain Removal Tools needed: wrench size: 1/2 in ▶ Drain the fuel from the tank. ▶...

  • Page 51: Installation

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 28 ▶ Unscrew bolts and remove fuel level sender from root fuel tank rib. Installation Tools needed: screwdriver ▶ Set sealing on the fuel tank flange. ▶ Set position and length of the fuel level sender lever according to Fig.
  • Page 52 B23-915 Airplane Maintenance Manual Bristell Chapter 28 supplement Intentionally left blank Chapter 28 Page 10 Issue: 09.12.2021...
  • Page 53 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 51 51-00 General 51-00-01 Access Panel Identification Fig. 1, Sheet 1 Access Panel Identification (outside) Item Description Item Description Aileron trim access panel LH wing access panels LH wing gap cover fuel pump bay access hatch...
  • Page 54 B23-915 Airplane Maintenance Manual Bristell Chapter 51 supplement Except from the oil and coolant hatch, which have a latching mechanism, all access panels are attached to the aircraft skin by means of AN526C832R8 bolts screwed into MS21047L08 anchor nuts. The wing gap covers are attached to the wing by means of M4x12 ISO 7380-2 A2 bolts with 5,3 DIN 6798 ZN serrated lock washers screwed into 9407-40300 nuts.
  • Page 55 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 61 Propeller Table of Contents Chapter Title Page 61-00 General ..................2 Removal ......................2 Installation ..................... 3 61-20 Controlling ..................4 Issue: 09.12.2021 Chapter 61 Page 1...

  • Page 56: General

    B23-915 Airplane Maintenance Manual Bristell Chapter 61 supplement 61-00 General The MTV-34-1-A/175-200 is a high performance, low weight 3 bladed hydraulic constant speed composite propeller for the ROTAX 915 series engine. The new MTV-34-1-A/175-200 feature the following: Low Propeller weight - 9 kg (19,8 lbs) for the 3-blade plus Governor P- •...

  • Page 57: Installation

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 61 Fig. 2 Removal/Installation of Propeller Item Description Item Description Alternator Bolts Tension bar V-belt Propeller Bolts Pulley carrier Pulley Installation Tools needed: wrench size No. 16 (5/8 in) NOTE Follow the instructions in the Operation, Installation, and Maintenance Manual, Section 5.

  • Page 58: Controlling

    B23-915 Airplane Maintenance Manual Bristell Chapter 61 supplement 61-20 Controlling MTV-34-1-A/175-200 propeller control lever (1) is located together with the throttle control on a quadrant between seats. Propeller control lever is connected through a Teleflex cable (2) with the propeller hydraulic governor (3). Once an engine rpm is selected it will be held constant at variations of airspeed and power.
  • Page 59 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 71 Power Plant Table of Contents Chapter Title Page 71-00 General ..................1 71-10 Cowling ..................2 71-20 Mounts ................... 4 71-00 General Power unit BRISTELL B23-915 model airplane ROTAX 915 iSc3 A engine and MTV 34 1 A/175-200 in flight adjustable 3-blade propeller.
  • Page 60 B23-915 Airplane Maintenance Manual Bristell Chapter 71 supplement 71-10 Cowling Engine cowling (Fig. 1) consists of two parts: upper cowling and lower cowling. The upper cowling (1) is attached by means of quick fasteners - Camlocks (6) to the firewall and to the lower cowling (2). Unlock the quick fasteners by turning the bolt by 90°...
  • Page 61 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 71 Item Description Item Description Engine upper cowling Engine lower cowling Air inlet for oil radiator Front water cooler air inlet Heating air inlet Quick fasteners - Camlocks Access hatch to oil tank...
  • Page 62 B23-915 Airplane Maintenance Manual Bristell Chapter 71 supplement 71-20 Mounts The engine mount connects the power unit to the airplane. It is welded from 4130 steel tubes and is attached to the firewall on one side and to the engine suspension frame, on the other side, by means of bolts. Between engine mount and suspension frame the connection is by four bolted attachments through rubber shock absorbers as depicted in Fig.
  • Page 63 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 Engine Table of Contents Chapter Title Page 72-00 General ..................2 Removal ......................6 Installation ..................... 7 Checks ......................9 72-20 Air Inlet Section ................12 Removal ....................... 13 Installation ....................13 72-20-10 Engine Cooling System ..............
  • Page 64 B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement 72-00 General ROTAX 915 iSc3 A is a turbocharged, four-stroke, four-cylinder, opposed - cylinder engine, central cam shaft and OHV - mechanism with maximal power of 104 kW (141 hp) at 5800 RPM. Technical Data ROTAX 915 iSc3 A Engine Model:...
  • Page 65 - Muffler (ROTAX PN 979475) -> 71B540001N For replacement of these parts contact the manufacturer BRM Aero NOTICE Modified parts can not be ordered through ROTAX but are custom BRM parts. Replacement engines must be modified according to BRM information, see Appendix drawing 71B500000N sheet 5/5 Issue: 09.12.2021...
  • Page 66 B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement Fuel Type Chapter 72 Page 4 Issue: 09.12.2021...
  • Page 67 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 Oil Type Type of oil used by aircraft manufacturer is shown in Chap. 12-00-01 Issue: 09.12.2021 Chapter 72 Page 5...

  • Page 68: Removal

    B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement Removal Tools needed: wrench size 8, 9, 10, 12, 17, 9/16 in Allen wrench size 8 screwdriver cutting pliers, pliers Cobra pliers (for clamps) ▶ Remove upper cowling ▶ Remove cooling air inlet duct (for intercooler and rear water cooler) ▶...

  • Page 69: Installation

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 ▶ Store the removed engine on a safe place on a suitable support and prevent it from damage and contamination. To further remove the engine mount from the firewall follow these steps: ▶...
  • Page 70 B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement Fig. 3 Suspension Frame – Engine Mount connection Item Description Item Description Engine mount Engine suspension frame Rubber mounts Connection bolts Washers Self-locking nut two washers for the upper connection NOTE (as depicted) and only one for the lower connection points ▶...

  • Page 71: Checks

    AOI of Bristell B23 (Par. 4.3) and Rotax engine Operator’s manual (Chapter 10.3). ▶ Start the engine according to the AFM of Bristell B23-915 (Par. 4.4) ▶ Activate starter for max.10 sec. only, followed by a cooling period of 2 min.
  • Page 72 (102 psi) for a short period at cold start. Fuel pressure has to be in range from 2.9 – 3.2 bar (42 – 45 psi). ▶ Engine warm up according to the AFM of Bristell B23-915 (Par. 4.4) ▶ As soon as oil pressure will be in range from 2 to 5 bar...
  • Page 73 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 ENGINE TEST REPORT Aircraft Bristell B23-915 Registration Engine ROTAX Type 915 iSc3 A Activity Set down values Measured values Starting up the engine Min. oil pressure up to 10 sec. 0.8 bar (12 psi) Max.

  • Page 74: Air Inlet Section

    B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement 72-20 Air Inlet Section Engine air inlet system ensures supply of sufficient air volume to the engine. Air is supplied to the engine through the RHS NACA inlet on the lower cowling leading to the Air filter box (1), in which the air filter (2) is installed.

  • Page 75: Removal

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 Removal Tools needed: Wrench size 8, 10 Screwdriver See Fig. 4. ▶ Remove the upper engine cowling. ▶ Remove cooling air inlet duct (for intercooler) ▶ Disconnect all hoses and electrical connections to the lower cowling ▶...

  • Page 76: Engine Cooling System

    B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement 72-20-10 Engine Cooling System Engine cooling is combined, cylinder heads are liquid cooled, cylinders are air cooled. Cooling circuit of cylinder heads is made as a closed system containing the pump, expansion tank with the pressure cap, water coolers and the overflow bottle.

  • Page 77: Radiator

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 72 72-20-11 Radiator Removal Tools needed: wrench size 10, screwdriver See Fig. 5. ▶ Remove the upper and lower engine cowling. ▶ Drain the cooling liquid from the cooling system (refer to Rotax manual).
  • Page 78 B23-915 Airplane Maintenance Manual Bristell Chapter 72 supplement Intentionally left blank Chapter 72 Page 16 Issue: 09.12.2021...
  • Page 79 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 73 Engine Control and Fuel Indicating- Table of Contents Chapter Title Page 73-20 Controlling ..................2 73-20-01 Throttle Control ................2 Removal ......................2 Installation ..................... 3 Adjustment ....................4 73-30 Indicating ..................4 73-30-01 Fuel Quantity ..................

  • Page 80: Controlling

    B23-915 Airplane Maintenance Manual Bristell Chapter 73 supplement 73-20 Controlling Engine power is controlled by means of the THROTTLE control lever which is positioned on the middle channel between the seats and which controls engine power from idle up to max. take–off power. Engine power control lever is mechanically connected (by Bowden cable) to the throttle control valve.

  • Page 81: Installation

    Bristell B23-915 Airplane Maintenance Manual supplement Chapter 73 Fig. 1 Throttle Control Lever Item Description Item Description Throttle control lever Throttle cable Bowden cable Throttle flap lever Throttle flap assy Installation Tools needed: wrench size 14 Allen wrench size 2...

  • Page 82: Adjustment

    B23-915 Airplane Maintenance Manual Bristell Chapter 73 supplement ▶ Connect the throttle (3) cable to the throttle flap lever (4). ▶ Install the cover of the throttle lever on the middle channel. ▶ Install the upper engine cowling. ▶ Check for continuous travel of the throttle control lever. Adjustment ▶...
  • Page 83 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 74 Ignition Table of Contents Chapter Title Page 74-00 General ..................2 Issue: 09.12.2021 Chapter 74 Page 1...
  • Page 84 B23-915 Airplane Maintenance Manual Bristell Chapter 74 supplement 74-00 General Engine is equipped with the double contactless ignition system. Every ignition circuit has its source of energy, control unit, 2–ignition coils and 4–spark plugs. It is fully independent on the other circuit. High voltage current is distributed to the spark plugs by means of high voltage cables.
  • Page 85 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 77 Engine Indicating Table of Contents Chapter Title Page 77-00 General ..................1 77-00 General The engine is instrumented with the following sensors, of which the stated ones have their values displayed in the Garmin system: ▶...
  • Page 86 B23-915 Airplane Maintenance Manual Bristell Chapter 77 supplement All sensor data (except for the fuel pressure sensor) are routed through the ECU, thus the failure of either LANE A or LANE B leads to loss of indication of the sensor indications as follows: ▶...
  • Page 87 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 78 Exhaust Table of Contents Chapter Title Page 78-00 General ..................2 Removal ......................3 Installation ..................... 3 Check ......................3 Issue: 09.12.2021 Chapter 78 Page 1...
  • Page 88 78-00 General Exhaust system of Bristell B23-915 airplane consists of exhaust pipes (1) from the four cylinders leading the exhaust gases to the turbocharger (3), where a part of the exhaust gas energy is transferred to the air inlet system by compressing (and heating) the engine air.
  • Page 89 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 78 Item Description Item Description Exhaust pipes Wastegate actuator Turbocharger Muffler Clamp End pipe Removal Tools needed: wrench size 10, 12 pliers See Fig. 1 ▶ Loosen the clamp (5) on the muffler (4) ▶...
  • Page 90 B23-915 Airplane Maintenance Manual Bristell Chapter 78 supplement ▶ Remove the heat exchanger and check muffler area located under it. ▶ Check the whole exhaust pipes between the engine and the muffler including its attachment to the engine. ▶ Check end pipe from the muffler. Chapter 78 Page 4 Issue: 09.12.2021...
  • Page 91 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 79 Table of Contents Chapter Title Page 79-00 General ..................2 79-20 Distribution ..................3 79-20-01 Oil Cooler ..................3 Removal ......................3 Installation ..................... 3 Issue: 09.12.2021 Chapter 79 Page 1...
  • Page 92 B23-915 Airplane Maintenance Manual Bristell Chapter 79 supplement 79-00 General Engine lubrication system (see Fig. 1) is a dry sump system. Engine lubrication system is equipped with a mechanically driven oil pump (7) which ensures oil supply from the oil tank (1) located on the firewall through the oil cooler (3) and the oil pump (7) with oil filter (8) to the lubricated points on the engine.
  • Page 93 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 79 79-20 Distribution 79-20-01 Oil Cooler Removal Tools needed: wrench size 22, 30 See Fig. 1. ▶ Remove the upper and lower engine cowling (see Chapter 71-10). ▶ Drain oil from the oil system (see Chapter 12-10-20 of the main manual).
  • Page 94 B23-915 Airplane Maintenance Manual Bristell Chapter 79 supplement Intentionally left blank Chapter 79 Page 4 Issue: 09.12.2021...
  • Page 95 Bristell B23-915 Airplane Maintenance Manual supplement Chapter 80 Starting Table of Contents Chapter Title Page 80-00 General ..................2 Description ....................2 Issue: 09.12.2021 Chapter 80 Page 1...
  • Page 96 B23-915 Airplane Maintenance Manual Bristell Chapter 80 supplement 80-00 General Description The ROTAX engine is equipped with an electric starter. The airframe mounted electric power supplied system consists of the following parts: Lane switch • Start power toggle switch • Starter button •...
  • Page 97 Chapter 91 Charts General Typical wiring diagrams of BRISTELL B23-915 model airplane systems, navigation and communication means are found here (refer to the Table of Content presented below). Further wiring diagrams, relating to additional equipment of the airplane are included in the documentation supplied with the airplane.
  • Page 98 B23-915 Airplane Maintenance Manual Bristell Chapter 91 supplement Table of Contents 34B500000N Avionics installation assembly 34B520000N Electrical power system Rotax 915 34B520009N Garmin G3X discrete inputs 34B520011N Engine sensors 34B520015N Fuel 34B520016N Internal lights 34B520023N Engine harness interface connectors 34B520200N Electrical grounding 34B540000N Engine wiring assembly...

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