C.
Remove the Pressure Relief Door (Fig. 401).
S 864-017
WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND
THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE
LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH
COULD CAUSE INJURY OR DAMAGE.
(1)
Close and lock the cargo door.
S 014-004
(2)
Remove the fiberglass shroud.
S 014-005
(3)
Remove the drip sheilds of the pressure relief doors from the cargo door.
S 034-006
(4)
Disconnect the control rod and the spring ends from the crank (View A).
S 034-007
(5)
Remove the bolts that secure the hinge fittings to the door frame.
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52-32-07
ALL ú ú 03 Page 401 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
PRESSURE RELIEF DOOR
SEE A
STOP PIN
PRESSURE
RELIEF
DOOR SEAL
(2 LOCATIONS) SHROUD PRESSURE RELIEF
PRESSURE RELIEF DOOR
DOOR DRIP SHIELD
(2 LOCATIONS)
CRANK
TORQUE TUBE
PUSHROD DOOR
SKIN
SIDE CARGO DOOR
SHROUD OUTBD
(2 LOCATIONS)
HINGE
FITTING SPRING
FWD A-A CONTROL
ROD
A
BUSHING (2 INSTALLED)STOP PIN FITTING (2 LOCATIONS)
PRESSURE SPRING
RELIEF DOOR ENDS
DOOR
BUSHING (1 INSTALLED)
DOOR WARNING SWITCH STRIKER HINGE FITTING
1 CONTROL
SPRING ROD PRESSURE RELIEF CRANK
DOOR SHAFT
A PRESSURE RELIEF DOOR
A
THE STRIKER FOR THE DOOR WARNING SWITCH IS ONLY ON THE AFT PRESSURE RELIEF DOOR Pressure Relief Door Figure 401
1
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52-32-07
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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
S 024-018
(6)
Remove the pressure relief door, the hinge fittings, the springs and the shaft as a unit.
S 714-008
(7)
Examine the seal around the cuttout of the pressure relief door.
S 964-019
(8)
Replace the seal if it is damaged.
TASK 52-32-07-404-009
3. Install the Pressure Relief Door________________________________
A. Standard Tools and Equipment
(1)
Spring Scale - 0-25 pounds
B.
References
(1)
AMM 52-09-00/801, Door Seal
(2)
AIPC 52-32-07 Fig. 1
C.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040, LH
(2)
Access Panels
836L Door - Main Deck Cargo
D.
Install the Pressure Relief Door (Fig. 401).
S 364-010
(1) Examine the seal on the pressure relief door for damage or deterioration.
NOTE: If damage is found, repair the seal per AMM 52-09-00/801.
____
S 424-011
(2)
Put the pressure relief door, the hinge fittings, the springs and the shaft as a unit in position on cargo door frame.
S 434-020
(3)
Install the hinge fittings with the outboard attachment boltheads in the down posiiton.
(4)
Align the holes in the control rod and pressure relief door crank.
(5)
Put the spring ends into position to touch the attachment bolt.
(6)
Install the bolt as shown (View A).
S 434-012
S 864-021
S 434-022
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