UPPER
GATE
PUSHROD
UPPER HINGE
ASEE
TORQUE TUBE
5. WASHER SEE C
6. BOLT
(7 LOCATIONS)
7. HINGE COVER
TORQUE
TUBE COVER
LOWER HINGE
LOWER GATE BSEE
PUSHROD
2. WASHER
3. BOLT
(8 LOCATIONS) UPPER
4. HINGE COVER BEARING
1. DOOR
FUSELAGE
STRUCTURE
HINGE LINK
9. NUT
10. WASHER
11. BOLT LOWER
8. UPPER BEARING
HINGE ARM PLATE
BODY
TORQUE TUBE
UPPER HINGE
A
Main Entry Door No. 1 Installation
Figure 401 (Sheet 1)
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52-11-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C71581
A
747-400 MAINTENANCE MANUAL
BODY TORQUE
BEARING TUBE
PLATE 4. GUIDE
17.
NUT PLATE
18.
WASHER
19.
BOLT
16. LOWER HINGE ARM
15. GUIDE ARM
FITTING
BELLCRANK LINK
Y
Y IS
12. GUIDE
LONGER
X
ARM
THAN X FWD
13.
WASHER
14.
BOLT (2 LOCATIONS)
HINGE HOUSING
ON DOOR
LOWER HINGE COCKING CRANK
B
PUSHROD ADJUSTMENT NUT BEARING (ABOVE AND BELOW PLATE BEARING PLATE)
COUPLING
SHAFT COUPLING BOLT
HINGE
TORQUE TUBE C Main Entry Door No. 1 Installation Figure 401 (Sheet 2)
C71635
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
APPROXIMATELY 540 POUNDS
SEE
BLOCK
Main Entry Door Sling
Figure 402
C71641
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
S 864-010
(2) Put the mode selector lever in the MANUAL/DISARM position.
S 014-057
(3) Remove the upper and lower hinge covers (7, 4).
S 014-013
(4) Remove the maintenance access panel from the forward outer side of the door.
S 014-053
(5) Remove the hinge flaps forward of the hinge links (AMM 52-11-14/401).
S 034-059
(6) Disconnect the guide arm (12) on the lower hinge from the door hinge housing. (a) Remove the two bolts and washers which attach the guide arm fitting to the door structure. (b) Open the door to remove the guide arm, with the fitting attached, from the hinge housing.
S 494-060
(7) Attach the sling to the door (Fig. 402). (a) Open the door to the fully open position. (b) Put the latch fitting block of the sling on the latch roller fitting. (c) Attach the latch fitting block to the latch roller fitting. 1) Use an 5/8-inch bolt and the large washer at the location of the thread hole in the latch roller fitting. 2) Tighten the bolt 20-30 pound-inches. (d) Apply sufficient tension to the sling cable to get the counterbalance weight of the door.
S 024-016
(8) Remove the main entry door. (a) Remove the bolt (11), washer (10, and nut (9) that attach the upper hinge arm (8) to the hinge link. (b) Remove the bolt (18), washer (17), and nut (16) that attach the lower hinge arm (15) to the bellcrank link. (c) Lift the entry door clear of the airplane and put it on the applicable transport stand.
