1
SHIMMING ADJACENT TO LATCH PLATE GIVES PROPER PLATE THICKNESS.
2
REPLACE WORN LATCH PAD WHEN WEAR ON PAD EXCEEDS 0.030 INCH.
Underwing Fuel Drain Door Wear Limits
Figure 601
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52-49-08
ALL ú ú 01 Page 602 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
REFUELING ACCESS DOORS - MAINTENANCE PRACTICES
______________________________________________
1. General_______
A. This procedure contains these tasks:
(1)
A removal of the refueling access door
(2)
An installation of the refueling access door
(3)
An inspection/check of the refueling access door.
B.
The refueling access doors are located on the lower side of the wing near the leading edge. The refueling access doors consist of the fueling receptacle access doors on the left and right side and the fueling control panel access door on the left side.
C.
The forward edge of the door is attached with a hinge to the leading edge structure (Fig. 201).
D.
The aft edge of the door is held in position against the panel stiffeners with clamps.
TASK 52-49-09-002-001
2. Refueling Access Door Removal____________________________
A. References
(1)
IPC 52-49-09 Fig. 1
B.
Access
(1)
Location Zone 543 Outbd. Main Tank (Part) Front Spar to Mid Spar, LH 643 Outbd. Main Tank (Part) Front Spar to Mid Spar, RH
C.
Remove the refueling access door (Fig. 201)
S 022-002
(1)
Remove the door.
(a)
Disengage the quick-release clamps (2 per door) at the aft edge of the door and allow the door to move to the open position.
(b)
Remove the fasteners that attach the hinge to the leading edge structure.
(c)
Remove the fasteners that attach the bonding jumper cables to the stiffeners.
(d)
Remove the door.
TASK 52-49-09-402-003
3. Refueling Access Door Installation__________________________________
A. References
(1)
28-21-04/401, Fueling Power Control Switch
(2)
51-24-04/701, Abrasion-Resistant Teflon Coating
(3)
IPC 52-49-09 Fig. 1
B.
Access
(1)
Location Zone 543 Outbd. Main Tank (Part) Front Spar to Mid Spar, LH 643 Outbd. Main Tank (Part) Front Spar to Mid Spar, RH
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FUELING CONTROL PANEL ACCESS DOOR
SEE B
FUELING RECEPTACLE ACCESS DOOR
SEE A
FUELING RECEPTACLE ACCESS DOOR
SEE A STIFFENERHOLD-OPEN ARMHOLD-OPEN ARM
HOLD-OPEN
HOLD-OPEN
PIN
PIN
FUELING RECEPTACLE FUELING CONTROL PANEL
ACCESS DOOR ACCESS DOOR
(EXAMPLE) (EXAMPLE)
A B
0.03 INCH
(0.762 mm)
MAXIMUM
CLEARANCE
(WEAR LIMIT) STRIKER LATCH BOLT
1 PLATE
SEE C
WEAR
SURFACE
0.338 INCH
(12.95 |0.76 mm) 0.51 |0.03 INCH LATCH MINIMUM (8.58 mm)
LATCH OVERLAP DIMENSION A-A (WEAR LIMIT)
2
1 SHIM STRIKER PLATE IF WEAR LIMIT IS EXCEEDED C
2 REPLACE LATCH IF WEAR LIMIT IS EXCEEDED
Refueling Access Door Installation
Figure 201
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