747-400 AMM 飞机维护手册 起落架 LANDING GEAR 1(12)

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 7.  Landing Gear Indication System (Ref 32-61-00/001)
______________________________
 A.  The landing gear position indication system monitors the position of the landing gear and landing gear doors. The position data is supplied to the flight crew through the EICAS display units.
 B.  The landing gear position is monitored by proximity switch sensors. The sensors are located on all landing gear and landing gear doors. The sensor signals supply the position data to EICAS display units and other airplane systems.
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 ALL  ú ú 01 Page 6 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 LANDING GEAR - MAINTENANCE PRACTICES
____________________________________ (AIRPLANE DISPATCH WITH LANDING GEAR LOCKED DOWN)
 1.  General_______
 A.  This procedure contains these four tasks:
 (1)  
The preparation of the airplane for dispatch with the body landing gear and the nose landing gear locked down

 (2)  
The preparation of the airplane for dispatch with the wing landing gear locked down

 (3)  
The procedure to put the airplane back to its usual condition (body landing gear and nose landing gear locked down)

 (4)  
The procedure to put the airplane back to its usual condition (wing landing gear locked down)

 B.  
It is possible to send the airplane when you cannot retract all the landing gear because of these items:

 (1)  
You cannot complete necessary maintenance operations because you cannot lift the airplane on jacks to do tests

 (2)  
Replacement components are not available for the retraction system for the landing gear and the applicable indication system.

 C.  
It is possible to send the airplane on a flight with the wing landing gear locked down.

 D.  
It is possible to send the airplane with the nose landing gear and the body landing gear locked down.

 E.  
The pilot will retract the landing gear that you do not lock down to decrease drag during flight.

 TASK 32-00-00-042-001
 2.  Preparation of the Airplane for Dispatch with the Body Landing Gear and the___________________________________________________________________________ Nose Landing Gear Locked Down_____________________________
 A.  Special Tools and Equipment
 (1)  
6ME65B00161-1 - Wing and Body Gear Ground Lockpin (2 are necessary)

 B.  
Standard Tools and Equipment

 (1)  
Fasteners to hold the body gear lockpins (2 of each are necessary)

 (a)  
AN960-1616 - Washer

 (b)  
BACB30LK04-16 - Lockpin Retainer Bolt

 (c)  
AN960-4L - Washer

 (d)  
BACN10JC04 - NUT

 (2)  
Fasteners to lock the nose gear down

 (a)  
BACB30NF7-36 - Nose Gear Lockbolt

 (b)  
AN960-716L - Washer

 (c)  
BACN10JC7 - Nut

 C.  
References

 (1)  
AMM 32-00-30/201, Landing Gear Door Locks

 D.  
Access

 (1)  
Location Zone 118 Electrical & Electronics Compartment, RH 715 Nose Landing Gear 755 Body Landing Gear, LH 765 Body Landing Gear, RH

 E.  
Procedure

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

LOWER JURY 
STRUT 
UPPER JURY 
STRUT 
SEE  B  SEE  A 
A  SPLIT RING  ATTACH 
CABLE 
WING GEAR 
LOCKPIN 
RETAINER 
BOLT 
BACB30LK04-16 
WARNING
STREAMER 
WASHER 
AN960-1616  CLIP 
WASHER  NUT 
AN960-4L  BACN10JC04 
WING AND BODY GEAR GROUND LOCKPIN 
　
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