Summary of Contents for Alexander Schleicher ASK 21 Mi
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Alexander Schleicher GmbH & Co. Segelflugzeugbau 36163 Poppenhausen - Germany Flight Manual No. 219.AFM.FAA.001 for the powered sailplane ASK 21 Mi Model: ASK 21 Mi Serial Number: Registration letters: TC Data Sheet No.: G47EU Issue: 01 December 2007 Pages identified by “Appr.” are approved by EASA / FAA within the scope of type certification.
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This Section contains operating limitations, instrument markings and basic placards necessary for the safe operation of the powered sailplane ASK 21 Mi, and its standard systems, installations, and standard equip- ment as provided by the manufacturer. The operating limitations included in this Section and in Section 9 are ap- proved by EASA.
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ASK 21 Mi Flight Manual Flight Manual 120 km/h Maximum speed for extending and 65 kts retracting the 75 mph propeller Do not extend nor retract the propeller outside of this speed range 90 km/h Minimum speed for extending and...
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ASK 21 Mi Flight Manual Flight Manual 2.5 Power-Plant Control Unit Markings The following table shows the markings of the digital ILEC engine control unit and the meaning of the colors employed. Green Diode Yellow Diode Red Diode Normal Operat-...
One example of calculating C.G. positions is given in Section 6 of the ASK 21 Mi Maintenance Manual. 2.8 Approved Maneuvers This powered sailplane is approved for normal sailplane and powered sailplane operation (Airworthiness Category "Utility").
ASK 21 Mi Flight Manual Flight Manual 2.10 Flight Crew For solo flights the pilot must occupy the front seat. With two up, the pilot in command occupies the front seat – unless the occupants agree prior to the flight that the pilot in command occupies the rear seat.
ASK 21 Mi Flight Manual Flight Manual 2.12 Fuel and Oil Add FUEL ONLY - WITHOUT two-stroke oil mixed. Two-stroke oil must be added separately through the oil fill port. Capacity of the fuselage tank: 23.2 Liter 6.13 US Gal Max.
ASK 21 Mi Flight Manual Flight Manual 2.13 Minimum Equipment Minimum Equipment consists of: ASI indicating up to 300 km/h (162 kts), in each instrument panel Altimeter, in each instrument panel Magnetic Compass, in the front instrument panel ILEC engine control unit, in each instrument panel...
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ASK 21 Mi Flight Manual Flight Manual 2.15 Operating Limitations Placard This placard is fixed at the right cockpit side wall and contains the most important mass and speed limitations. For reduced minimum cockpit load in the front seat by fitting removable trim ballast in front of the pedals: see Section 7.11.
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ASK 21 Mi Flight Manual Flight Manual This placard is affixed on the fuselage tank: This placard is affixed on the right wall of the engine compartment near the oil tank: If the aircraft has not installed the minimum equipment for cloud flying (see 2.13), this placard is located near the data placard:...
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ASK 21 Mi Flight Manual Flight Manual 3.1 Introduction This Section contains Check Lists, summarizing procedures recom- mended in the case of emergencies, in the form of brief headings. This is followed by a more detailed description. EMERGENCY PROCEDURES To Jettison Canopies...
ASK 21 Mi Flight Manual Flight Manual 3.3 Bailing Out If bailing out becomes inevitable, first the canopy is jettisoned, and only then should the seat harness be released. Front Pilot: Push instrument panel upwards (if this was not yet al- ready done in the course of jettisoning the canopy).
ILEC Change Over Switch: If the above points check out correctly, the fault cannot be rectified in flight, the propeller should be retracted and the ASK 21 Mi should from then on be operated as a pure sailplane. Retract propeller in the normal manner in accordance with the check list.
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ILEC Change Over Switch: If the above points check out correctly, the fault cannot be rectified in flight, the propeller should be retracted and the ASK 21 Mi should from then on be operated as a pure sailplane. Retract propeller in the normal manner in accordance with the check list.
ASK 21 Mi Flight Manual Flight Manual 3.9 Other Emergencies (1) Groundloops If the aircraft threatens to roll out beyond the intended landing area, the decision should be made not less than 40 m (140 ft) before reaching the end of the landing area to initiate a controlled ground loop.
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ASK 21 Mi Flight Manual Flight Manual (4) Defective Airbrake Control Circuit If sudden strong change of flight course happens, the pilot should imme- diately visually check that the airbrakes have extended on both wings as this asymmetry may be caused by an airbrake extended on one wing only.
ASK 21 Mi Flight Manual Flight Manual 4.3 Daily Inspection 1) Open canopies. Check main pins inserted up to the handle and se- cured. 2) Check control connections of ailerons and air brakes in the fuselage through the access hole at the left side above the wing. Check the proper use / engagement of the safety elements on the quick-release connectors.
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ASK 21 Mi Flight Manual Flight Manual 13) Air brake: Check condition, free movement, alignment and locking. 14) Check the rear wing attachment pins for proper seating and locking. 15) Check that static ports in the fuselage tail boom are unobstructed! 16) Pressure probe on the tail boom or optional in the fin: Check condi- tion and proper seating.
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ASK 21 Mi Flight Manual Flight Manual 13) Air brake: Check condition, free movement, alignment and locking. 14) Check the rear wing attachment pins for proper seating and locking. 15) Check that static ports in the fuselage tail boom are unobstructed! 16) Pressure probe on the tail boom or optional in the fin: Check condi- tion and proper seating.
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ASK 21 Mi Flight Manual Flight Manual Daily Inspection with Extended Propeller a) When extending the propeller pay attention to unusual noise and stiff- ness of operation. b) The most important bolted connections can be checked from above through the open engine bay doors. With one exception they are se- cured with standard stop nuts, and therefore are easy to check.
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ASK 21 Mi Flight Manual Flight Manual l) Check limit switch for electric jack for damage and secure seating - including the electrical connections. m) Check the toothed belt for wear and correct pre-tension. It should be possible to twist the belt just by 30°...
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ASK 21 Mi Flight Manual Flight Manual Tank System (fuel and oil) a) Check correct closing of the fuel tank cap. b) Check visually fuselage tank for leaks. c) Press drainer and release any condensation if present. Watch care- fully that the drainer afterwards closes again tightly. The drainer is sit- uated at the fuselage bottom left side below the wing.
ASK 21 Mi Flight Manual Flight Manual 4.4 Pre-Flight Checks The following Check Lists containing the most important points are affixed within easy view of the front seat pilot: Prior to solo flights the pilot must satisfy himself that Caution: both the switch of the fuel pump 2 and the ignition switch of the rear ILEC-control unit are “OFF”!
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ASK 21 Mi Flight Manual Flight Manual 4.5 Normal Operation and Recommended Speeds 4.5.1 Power-Plant Control and Self-Launch Warning: The access hole cover must be correctly locked and taped up. Non-observance risks that it may become loose and damage the propeller when the engine is running.
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ASK 21 Mi Flight Manual Flight Manual Cold start (very cold, engine heavily cooled down, OAT ≤ 0°C/32°F) Propeller area CLEAR Throttle: IDLE (lowermost setting) Press STARTER button max. 5 seconds If engine does not fire, press STARTER again after a short rest period...
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ASK 21 Mi Flight Manual Flight Manual field, before attempting a cross country flight. The power-plant of a pow- ered sailplane must not be regarded as a life insurance, for instance when crossing unlandable areas. One should always be prepared for the pos- sibility that the power-plant will fail to deliver the hoped-for propulsion.
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ASK 21 Mi Flight Manual Flight Manual With the engine running the red ECU light normally is out. If it remains constantly on when the engine is running, a defect must be suspected in some area of the electronic engine control system. Such defect must be repaired prior to the next take-off.
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ASK 21 Mi Flight Manual Flight Manual For a safe self-launch maximum engine revolutions should come up to 7000 RPM on the ground. With lower revolutions the pilot must face longer take-off distances than indicated in Section 5.2.3. If maximum revolutions on the ground are below Warning: 7000 RPM, the aircraft must not take off.
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ASK 21 Mi Flight Manual Flight Manual High Speed Flight: The aircraft shows no flutter tendency within the permissible speed range. With airbrakes extended in a 45° dive the speed remains below V 280 km/h (151 kts, 174 mph); at all up weight of 705 kg speed will be up to 251 km/h (136 kts, 156 mph).
ASK 21 Mi Flight Manual Flight Manual 5.2.3 Take-Off Performances The take-off performances given below are applicable to take-offs on hard and level grass runways and for the aircraft, propeller, and engine in good condition and for the following conditions:...
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ASK 21 Mi Flight Manual Flight Manual If the cruise flight is done at v = 125 km/h (67.5 kts, 77 mph) and at 7100 RPM, a fuel consumption of 14 l/h (3.7 US Gal/h) gives a flight time of 98 minutes from a full fuselage tank. This provides a range of 200 km (108 Nm).
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ASK 21 Mi Flight Manual Flight Manual Section 6 Mass (Weight) and Balance, C.G. Position 6.1 Introduction 6.2 Mass (Weight) and Balance Form 6.3 Calculation of in-flight C.G. Issue: 01.12.2007 mh / mg / mm App. Revision: TN21 / 21.09.22...
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Introduction This Section describes the limits of load distribution, inside which the ASK 21 Mi can be safely operated. Weighing procedure and calculation of permissible C.G. limits are de- scribed in the Maintenance Manual, Section 6. A complete list of the equipment which is installed in the aircraft during the weighing, is con- tained in the aircraft records together with a detailed weighing report.
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ASK 21 Mi Flight Manual Flight Manual 6.3 Calculation of in-flight C.G. App. Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
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ASK 21 Mi Flight Manual Flight Manual Pilot Lever Arms For the pilot lever arm the least favourable value must be used, unless the lever arm was established by weighing (the position of the back rest must be recorded). Masses in front of Datum have negative moment arms.
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ASK 21 Mi Flight Manual Flight Manual to run. When the engine is running the light will be out if there are no errors. A flashing of the ECU light indicates a problem in one of the following systems: 1 1 ( Map #1 Sensor •...
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ASK 21 Mi Flight Manual Flight Manual Fig. 7.7-2 Power-Plant Control Console, front Main Switch for Power-Plant and Avionics (Engine Battery) Propeller stop Starter Throttle Adjusting twist knob for throttle friction brake Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.21...
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ASK 21 Mi Flight Manual Flight Manual Fig. 7.7-2 Power-Plant Control Console, front Master switch for engine battery Propeller stop Starter Throttle Adjusting twist knob for throttle friction brake Issue: 01.12.2007 mh / mg / mm Revision: TN10 / TN21 / 21.09.22...
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ASK 21 Mi Flight Manual Flight Manual Change-over switch between both ILEC engine control units: Change-over switch cockpit rear Change-over switch cockpit front In each cockpit one ILEC control unit is installed. The ILEC change-over switch selects the master unit.
8.4 Ground Handling / Road Transport (1) Parking The ASK 21 Mi is equipped with plastic sealing tape at all control surface gaps. This means that when parking the aircraft principally all control sur- faces must always be set to neutral!
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ASK 21 Mi Flight Manual Flight Manual Spin Characteristics The ASK 21 spins in upright flight as well as in inverted flight. WARNING: Intentional spins are only permitted in upright flight. The ASK 21 spins fast, steeply, and combined with a pitch oscillation.
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ASK 21 Mi Flight Manual Flight Manual CAUTION: The washer and nut screwed on the cockpit placard (see above) must be used. After removal of the spin ballast the washer and the nut must be fixed again on the placard.
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ASK 21 Mi Flight Manual Flight Manual 2.15 Operating Limitations Placard The following placards replace the respective placards of the powered sailplane: 3 Emergency Procedures There are no changes for the emergency procedures. Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
ASK 21 Mi Flight Manual Flight Manual 5 Performance Because of the lower wing loading the stall speed decreases by about 6 km/h (3.2 kts, 3.7 mph). 6 Weight and Balance A Mass and Balance Form must be available which must be headlined with “ASK 21, MTOW 600kg”...
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Alexander Schleicher GmbH & Co. Segelflugzeugbau D-36163 Poppenhausen Maintenance Manual for the powered sailplane ASK 21 Mi Model: ASK 21 Mi Serial Number: Registration Letters: TCDS-No.: G47EU Issue: December 1, 2007...
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ASK 21 Mi Maintenance Manual Maintenance Manual Wheel brake system If the action of the wheel brake is found to be poor or altogether ineffec- tive, this may be due to the following causes: Brake linings may be worn and needing renewal.
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ASK 21 Mi Maintenance Manual Maintenance Manual In order to prevent the entry of air, the brake fluid is poured from the bot- tom upwards. A simple filling rig would require about 2 m (6.6 ft) of instru- ment hose with a funnel at the top end, filled with about ¼ l (0.066 US Gal.) of brake fluid.
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ASK 21 Mi Maintenance Manual Maintenance Manual In order to prevent the entry of air, the brake fluid is poured from the bot- tom upwards. A simple filling rig would require about 2 m (6.6 ft) of instru- ment hose with a funnel at the top end, filled with about ¼ l (0.066 US Gal.) of brake fluid.
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ASK 21 Mi Maintenance Manual Maintenance Manual Remove the air intake filter [20] and set the throttle to Wide Open (so that the throttle valve remains open). An application bottle or a sy- ringe is fixed to a thin Silicone hose which is introduced on a length of 475 mm (1.6 ft) into the intake ram...
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ASK 21 Mi Maintenance Manual Maintenance Manual In order to distribute the oil evenly in all chambers the propeller is ro- tated several times by hand prior to starting the engine. Warning: Make sure that all electrical circuits and ignition circuits are off so that the propeller can be moved by hand without any risks.
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ASK 21 Mi Maintenance Manual Maintenance Manual Fig. 3.1-1 Control surface deflections, rigging angles, and jacking points for the wing bending frequency test Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
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ASK 21 Mi Maintenance Manual Maintenance Manual Section 4 Airworthiness Limitations Inspection Program to extend Service Life 4.1.1 US-registered Aircraft 4.1.2 Non-US-registered Aircraft Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
ASK 21 Mi Maintenance Manual Maintenance Manual 4. Airworthiness Limitations The airworthiness limitations section is approved and variations must also be approved. The following statement is applicable only in case this ICA is used on the basis of a TC issued by the FAA following the validation of the respective...
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The high-loaded primary structure of the ASK 21 Mi includes: the spar stubs, the wing root, the main spar in the wing between root and air brakes, as well as the horizontal stabilizer.
18000 hours. Inspection Program Alexander Schleicher will develop an inspection program for the 3000, 6000, 9000, 12000 and 15000 flight hour intervals. This program will be approved by the aviation authority and will be available for purchase from Alexander Schleicher.
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ASK 21 Mi Maintenance Manual Maintenance Manual 4.1.2 Non-US-registered Aircraft For non-US-registered aircraft the latest issue of chapter 4 of the aircraft maintenance manual without revision TN21 applies. Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
ASK 21 Mi Maintenance Manual Maintenance Manual 6.1 Introduction This Section describes the procedures for determining the empty mass and the empty mass moment of the aircraft. In addition, procedures for determining the Center of Gravity (C.G.) are provided. A list of equipment fitted is contained in the most recent and currently valid aircraft inspection report.
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ASK 21 Mi Maintenance Manual Maintenance Manual 6.1 Introduction This Section describes the procedures for determining the empty mass and the empty mass moment of the aircraft. In addition, procedures for determining the Center of Gravity (C.G.) are provided. A list of equipment fitted is contained in the most recent and currently valid aircraft inspection report.
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ASK 21 Mi Maintenance Manual Maintenance Manual Fig. 6.2-1 Determining Empty Mass C.G. Empty mass C.G. x ⋅ − Empty mass m The aircraft must be prepared for weighing as follows: 1. flight instruments fitted and canopies closed 2. seat backrests, seat cushions or equivalent in place 3.
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ASK 21 Mi Maintenance Manual Maintenance Manual Fig. 6.2-1 Determining Empty Mass C.G. Empty mass C.G. x ⋅ − Empty mass m The aircraft must be prepared for weighing as follows: 1. flight instruments fitted and canopies closed 2. seat backrests, seat cushions or equivalent in place 3.
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ASK 21 Mi Maintenance Manual Maintenance Manual Section 7 Periodic Inspections and Special Inspections Periodic Inspections of the Airframe 7.1.1 Introduction 7.1.2 Inspection Program 7.1.3 Inspecting the Quick-Release Connectors of the Control Linkages 7.1.4 Inspecting the Control Surface Gap Sealing Special Inspections of the Airframe 7.2.1 After hard landings...
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ASK 21 Mi Maintenance Manual Maintenance Manual 7.6 Special Servicing Procedures and Equipment Subject to Service Life Limitations Special Servicing Procedures At regular intervals of 6 years, the brake line hose between brake fluid reservoir and the master cylinder must be replaced. Should this hose be in good condition, it need not be replaced provided its condition is then checked at least every 100 flying hours.
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ASK 21 Mi Maintenance Manual Maintenance Manual 7.6 Special Servicing Procedures and Equipment Subject to Service Life Limitations Special Servicing Procedures Brake line hoses of the “old type” must be replaced at regular intervals of 6 years. Should this hose be in good condition, it need not be replaced, if its condition is checked at least every 100 flying hours.
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ASK 21 Mi Wartungshandbuch Wartungshandbuch Power-Plant For the IAE 50R-AA power-plant the service instructions as specified in the engine manual are applicable. The maintenance intervals are specified therein. More recent information is published in Technical Notes where required. Propeller For the propeller AS2F1-1 the service instructions as specified in the propeller manual are applicable.
ASK 21 Mi Maintenance Manual Maintenance Manual 9.1 General Placards The whole of the placards and pictograms is listed and explained in Sec- tions 2 and 7 of the Flight Manual. The consecutive numbers as marked against the placards shown hereaf- ter refer to their location in the aircraft and match the numbers shown in Figs.
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ASK 21 Mi Maintenance Manual Maintenance Manual Issue: 01.12.2007 mh / mg / mm Revision: TN21 / 21.09.22...
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ASK 21 Mi Maintenance Manual Maintenance Manual If the aircraft has not installed the minimum equipment for cloud flying (see aircraft flight manual section 2.13), this placard is located near the data placard: If the aircraft has installed the minimum equipment for cloud flying (see aircraft flight manual section 2.13), this placard is located near the data...
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ASK 21 Mi Maintenance Manual Maintenance Manual 10.4 Dismounting and Mounting Tow Release Hook Cou- plings The tow release hook couplings are accessible after removing the cover- ing panels in the cockpit. After undoing the mounting bolts the nose tow release coupling can be pulled outside, while the center of gravity (CG) tow release hook coupling can be taken out upwards.
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ASK 21 Mi Maintenance Manual Maintenance Manual The turnbuckle at the nose tow release coupling must be adjusted such that both couplings release at about the same time. Both tow release cou- plings must be actuated until they are entirely opened. In the closed con- dition none of the Bowden cables must be under tension.
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ASK 21 Mi Maintenance Manual Maintenance Manual Torque moments of the groove nuts at propeller shaft and engine drive shaft: Thread size ftꞏlb M24 x 1.5 Propeller shaft M38 x 1.0 Propeller shaft M30 x 1.5 Engine drive shaft M20 x 1.5 Engine crank shaft Torque moments of the radial bolts at the Centaflex rubber coupling at...
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ASK 21 Mi Maintenance Manual Maintenance Manual Minimum Equipment: See Flight Manual Sections 2.10 and 2.13 Data Sheet Measuring Manufacturer Type Ref. No. Spec. No. Range Airspeed Indicator 6 FMS 421 TS 10.210/15 40-300km/h AS-4-21Mi 6 FMS 441 TS 10.210/15...
The following Maintenance Instructions are established from time to time as required, in accordance with experience accumulated in operat- ing the ASK 21 Mi. The Maintenance Manual is to be supplemented in case of new issues of Maintenance Instructions. "PAINT CRACKS" dated June 26, 1989, (general Maintenance Instruc- tion) describes how to inspect, preserve, and repair the paint surface.
Manual page 9.A.8 respectively 9.B.12) must be removed. Removing the spin ballast-table does not compromise airworthiness of the ASK 21 Mi. But spin ballast may not be used without valid spin ballast- table. A new table for the spin weights can be requested from the manufactur- er.
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ASK 21 Mi Maintenance Manual Maintenance Manual The following placard replaces the respective placard (no.15) as shown in Section 9 (in both seats): Ausgabe: 01.12.2007 mh / mg / mm Änderung: TN21 / 21.09.22 13.A.4 Spin Ballast...
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