52-32-07
ALL ú ú 03 Page 403 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 824-013
(7)
Adjust the flushness of the pressure relief doors as follows:
(a)
Make sure the master latch lock handle is closed.
(b)
Make sure the flushness between the pressure relief door and the cargo door cuttout is 0.03 inch.
(c)
Adjust the stop pins (View A-A) as it is necessary.
S 724-014
(8)
Examine the spring force.
(a)
Push the pressure relief door inboard 1 inch measured from the top of the door.
(b)
Make sure the door opens with a force of 12-16 pounds.
(c)
Push more on the pressure relief door until the top of the door is open 4 inches (| 0.1 inch).
(d)
Make sure the force necessary is between 15-20 pounds.
(e)
Replace the springs if you cannot get the necessary forces.
S 434-015
(9)
Install the drip shields on the cargo door.
S 434-016
(10)
Install the fiberglass shroud.
TASK 52-32-07-204-024
4. Do a Check of the Pressure Relief Door Mechanism________________________________________________
NOTE: This is a scheduled maintenance task.
____
A. References
(1)
AIPC 52-32-07 Fig. 1
B.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040, LH
(2)
Access Panels
836L Door - Main Deck Cargo
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52-32-07
ALL ú ú 03 Page 404 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
C. Procedure
S 284-025
(1)
Examine the spring force.
(a)
Push the pressure relief door inboard 1 inch measured from the top of the door.
(b)
Make sure the door opens with a force of 12-16 pounds.
(c)
Push more on the pressure relief door until the top of the door is open 4 inches (| 0.1 inch).
(d)
Make sure the force necessary is between 15-20 pounds.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-32-07
ALL ú ú 02 Page 405 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
DOOR HINGE - REMOVAL/INSTALLATION
_________________________________
1. General_______
A. This procedure contains two tasks:
(1)
The first task is the removal of a hinge from the side cargo door.
(2)
The second task is the installation of a hinge on the side cargo door.
B.
The door hinge assembly on the upper edge of the side cargo door has 13 sections. The sections have numbers from 1 to 13 with hinge section 1 at the forward end of the door. Hinge section 1 is a single unit hinge with a separate hinge pin. Hinge sections 2 and 3 are single unit hinges with the same hinge pin. Hinge sections 4 thru 10 are single unit hinges with separate hinge pins. Hinge sections 11, 12 and 13 are single unit hinges with the same hinge pin.
TASK 52-32-08-004-001
2. Door Hinge - Removal____________________
A. Special Tools and Equipment
(1)
Sling, Side Cargo Door - 20HME65B17601 (Necessary to remove hinge sections with the same pin)
B.
References
(1)
52-32-00/001, Side Cargo Door
(2)
52-32-18/401, Side Cargo Door Rain Seal
(3)
AIPC 52-32-05 Fig.1, AIPC 52-32-01 Fig.1, AIPC 53-12-78 Fig.1
C.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040, LH
(2)
261 Access Panel
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