曝光台 注意防骗
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1. GENERAL
This inspection is implemented :
- On the basis of a statement by the pilot in the flight report indicating that one of the following engine incidents has occured :
overspeed,
overpressure (or overtorque),
overheat.
The pilot must always stipulate the extent of the overshoot and its duration.
- On the basis of findings during any inspection, in the workshop, which would tend to indicate that the engine has suffered one of the overshoots mentioned above.
2. DETAILED INSPECTION
A. Tools and consumable materials None
B. Operations
Remove engine, propeller and propeller variable pitch regulator for investigation and / or reconditioning in a specialized workshop.
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INSPECTION AFTER LIGHTNING STRIKE
INSPECTION / CHECK
1. GENERAL
A lightning strike normally results in the following phenomena :
A. Thermal
The thermal effects may lead to melting and even to piercing of some components (leading edge skins, rib leading edges, trailing edges, static dischargers, antennas and supports) or may produce localized overheating for a short period leading to damage heat treatment.
B. Electric and magnetic
The electric and magnetic effects may lead to overcurrents in some sections of the electrical and radio circuits and to unwanted magnetization of some components.
When the aircraft has been struck by lightning (either in flight or on ground), the following checks must be carried out before returning the aircraft to service.
2. DETAILED INSPECTION
A. Tools and consumable materials None
B. Operations
1) Inspect the external surface of the airframe to detect obvious defects as described above. Also inspect for signs of electric arcing with small black micro-fusion pits and which may be concentrated or spread over a considerable area. Thoroughly inspect :
- the front section of the fuselage,
- the wing leading edge and tips,
- the trailing edge of the wings, ailerons and flaps,
- the condition of static dischargers (if installed),
- the condition of aileron and flap hinges,
- the condition of aileron and flap bonding straps (if installed),
- the end of the tail cone,
- the leading edge of the horizontal and vertical stabilizers,
- the trailing edge of the horizontal and vertical stabilizers,
- the condition of the static dischargers on the stabilizer (if installed),
- the condition of the stabilizer hinges,
- the condition of the elevator and rudder bonding straps (if installed),
- both nose and main landing gears and doors for signs of arcing or other defects, if the landing gear was extended when the strike occurred,
- the propeller cone, the engine cowlings and the various bonding strips,
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TB 20 MAINTENANCE MANUAL 05 TIME LIMITS MAINTENANCE CHECKS TB20飞机维护手册 05 时间限制维护检查 2(92)
