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钻石42飞机飞行手册 DA 42 Airplane Flight Manual(42)

时间:2011-10-28 13:17来源:蓝天飞行翻译 作者:admin
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3.6 LANDING GEAR SYSTEM FAILURES
3.6.1 LANDING GEAR UNSAFE WARNING
NOTE
The landing gear unsafe warning light illuminates if the landing gear is neither in the final up or down & locked position. Illumination of this light is therefore normal during transit.
If the light remains on for longer than 20 seconds during landing gear retraction / extension:
1.
Airspeed ............................  check below vLOR 156 KIAS


2.  
Gear selector ........................ re-cycle if continued illumination
occurs

 

If the landing gear cannot be extended to the down & locked position or red light does not extinguish:
-Continue with 3.6.2 - MANUAL EXTENSION OF THE LANDING GEAR.
CONTINUED
Doc. No. 7.01.05-E  Rev. 5  15-Nov-2007  Page 3 - 41 


NOTE
If the landing gear cannot be retracted to the final up position you may continue the flight with the landing gear extended in the down & locked position. Consider for higher aerodynamic drag, resulting in degraded flight performance, increased fuel consumption and decreased range.
With the landing gear extended and at aft CG-locations, with flaps up and full power applied, the aircraft will easily recover from sideslip if the trim is set to neutral (normal procedure). Otherwise it may require corrective action with a moderate amount of rudder input.
In cold ambient temperatures it may help to reduce the airspeed below 110 KIAS for landing gear operation.
END OF CHECKLIST 3.6.2 MANUAL EXTENSION OF THE LANDING GEAR

 

NOTE
In case of a failure of the electrical pump, which is driving the landing gear actuators, the landing gear can be extended manually at speeds up to 156 KIAS. The manual extension of the landing gear may take up to 20 seconds.
The following checks shall be completed before extending the landing gear manually:
1.
Gear indicator lights ................... test / push test button


2.
ELECT. MASTER .................... check ON


3.
Bus voltage.......................... check in normal range


4.
Circuit breaker ....................... check in / reset if necessary

 

CONTINUED
Doc. No. 7.01.05-E  Rev. 5  15-Nov-2007  Page 3 - 43 


Manual landing gear extension procedure:
5.
Gear selector ........................ select DOWN


6.
Manual gear extension handle ........... pull out

 

NOTE
The landing gear should now extend by gravity and relief of hydraulic pressure from the system. If one or more landing gear indicator lights do not indicate the gear down & locked after completion of the manual extension procedure steps 1 - 6 reduce airspeed below 110 KIAS and apply moderate yawing and pitching to bring the landing gear into the locked position.
 
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