747-400 AMM 飞机维护手册 舱门 DOORS 2(28)

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 (6)  Make sure the LATCHES CLOSED light on the control panel and all green lights on annunciator module come on.
 NOTE: The LATCHES CLOSED light will not come on until all the latch
____ pins are fully extended. The green lights on the annunciator module come on individually as each latch pin is fully extended.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 NOSE CARGO DOOR - REMOVAL/INSTALLATION
______________________________________
 1.  General_______
 A. This procedure has two tasks:
 (1)  
The removal of the nose cargo door

 (2)  
The installation of the nose cargo door

 TASK 52-31-01-024-001
 2.  Nose Cargo Door Removal (Fig. 401)_______________________
 A. Special Tools and Equipment
 (1)  
Crane (Overhead) - 4500-pound minimum lift capacity

 (2)  
MIT65B12349 - Thread Protector, Hinge Bolt

 (3)  
MIT65B80430 - Alternate Drive Extension, Nose Cargo Door Lift Actuator

 (4)  
PRE65B13015 - Safety Barrier, Nose Cargo Door

 (5)  
20HME65B13015 - Sling, Nose Cargo Door

 B.
Standard Tools and Equipment

 (1)  
Adapter - 0.250-Inch Hex to 0.375-Inch Square Tang, Model CP-S-75350Y, Chicago Pneumatic Company, or Equivalent

 C.
References

 (1)  
52-31-02/401, Nose Cargo Door Linear Actuator

 D.
Access

 (1)  
Location Zones
 801 Nose Cargo Door

 (2)  
Access Panels
 221BR Door Hinge Access, Right
 221BL Door Hinge Access, Left

 E.
Prepare For Removal (Fig. 401)

 S 494-003
 (1)  
Attach lift brackets to the nose cargo door.

 (a)  
Remove 44 countersunk screws and plugs from sling attachment points.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

LINEAR ACTUATOR (2 LOCATIONS) A DOOR HINGE NOSE CARGO 
SEE  B 
A  CLEARANCE DOOR HINGE ACCESS 
NOSE CARGO DOOR 
EXTENSION ALTERNATE DRIVE (MIT65B80430) 
DRIVE UNIT AND MECHANISM FLEX DRIVE  SEE  A 

PUSH-PULL CAM AND ACTUATOR
SEE C
COMMERCIAL
MIT65B80430 ADAPTER
AIR OR ELECTRIC
ALTERNATE DRIVE EXTENSION
A

Nose Cargo Door Installation
Figure 401 (Sheet 1)

B26876
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 ALL  ú ú 02 Page 402 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

WASHER LUBE FITTING BOLT
DOOR HINGE
THREAD PROTECTOR HALF
MIT65B12349
NUT BODY HINGE HALF
POINT OF WASHER PUSH-PULL CAM CONTACT ACTUATOR
ROLLER SHIM (2 LOCATIONS) (2 LOCATIONS)
HINGE BOLT INSTALLATION (DOOR IN FULL OPEN POSITION)
B
CAM  FWD 
NOSE CARGO 
DOOR 
LARGE NUT (TIGHTEN TO  HINGE  HALF DOOR HINGE  PUSH-PULL CAM AND ACTUATOR 
2000 TO 2400 POUND-INCHES)  BUSHING  0.08 0.13 0.03  (SHOWN IN THE OPEN POSITION) 
SMALL  C 
NUT 
SMALL 
HINGE 
BOLT 
SHIM 
(2 LOCATIONS) 

COTTER LARGE HINGE
PIN
BOLT
WASHER
WASHER HINGE
WASHERS BODY HINGEINBD BEARING
0.13 HALF0.08
0.03 FWD
LEFT HINGE SHOWN
(RIGHT HINGE EQUIVALENT)
　
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