(a)
Push the release trigger of the master latch lock handle.
(b)
Make sure you observe these conditions: 1) The master latch lock handle is in the unlocked (open)
position. 2) The two pressure relief doors are open.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-00
ALL ú ú 05 Page 617 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
3) The master latch lock sectors have turned outboard to clear the latch cams.
(c) Push the master latch lock handle to the locked (closed) position.
(d) Make sure you observe these conditions: 1) The master latch lock sectors have rotated inboard so that the inboard heel of the sector is inboard of the latch cam throat and the outboard end of the sector extends into the cutout in the lower beam of the door.
2) The two pressure relief doors are closed. 3) The master latch lock handle and the trigger are flush with the door skin.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-00
ALL ú ú 05 Page 618 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FORWARD/AFT CARGO DOOR - REPAIRS
________________________________
1. General_______
A. This procedure contains two tasks:
(1)
A task that lubricates the latches and the hooks
(2)
A task you can use to drill rigging pin holes in the hook support fittings.
TASK 52-34-00-608-001
2. Lubricate the Latches and Hooks (Fig. 801)_______________________________
A. General
(1)
There can be times when the door will not latch electrically. Friction between the parts of the latch and hook mechanisms parts can cause this. This procedure lubricates these parts to allow the door to latch.
(2)
Adjust the latch and hook mechanism to allow normal operation when it is possible.
B.
Consumable Materials
(1)
D00013 Grease, MIL-G-23827
C.
References
(1)
52-34-00/501, Forward/Aft Cargo Doors
(2)
AIPC 52-34-06 Fig 2, AIPC 52-34-07 Fig 2
D.
Access
(1)
Location Zone 122 Forward Cargo Container Compartment, Forward Half 142 Aft Cargo Container Compartment
(2)
Access Panel
821R Door - Forward Cargo Compartment
822R Door - Aft Cargo Compartment
E.
Procedure
(1)
Open the cargo door (Ref 52-34-00/001).
(2)
Put grease on the hooks and latches (Fig 801).
(3)
Close the door electrically (Ref 52-34-00/001).
S 838-005
(4)
Adjust the hook and latch mechanisms when it is possible (Ref 52-34-00/501).
S 018-002
S 648-003
S 418-004
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-00
ALL ú ú 01 Page 801 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
LATCH
SEE A
HOOK
(2 LOCATIONS)
SEE A
USE A LARGE AMOUNT
OF GREASE TO LUBRICATE
THE HOOK SURFACES
(2 LOCATIONS)
USE A LARGE AMOUNT
OF GREASE TO LUBRICATE
THE LATCH CAMS
(8 LOCATIONS)
A
Cargo Door Repair
Figure 801
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 舱门 DOORS 3(37)
