28.
BOLT (4 LOCATIONS)
29.
HINGE COVER
30. SPACER (4 LOCATIONS)
57. BOLT
60. WASHER
58.
WASHER
59.
NUT
31. WASHER ( 2 LOCATIONS)
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747-400
MAINTENANCE MANUAL
16. UPPER HINGE HOUSING
17. BOLT
(3 LOCATIONS) 54. BOLT
57. WASHER
20. LOWER 55. WASHER
BEARING 18. BEARING 56. NUT
PLATE 19. SEAL 45. TAPPERED PIN
21. WASHER 23. BOLT (4 LOCATIONS)
22. NUT 44. WASHER
51. WASHER (2 LOCATIONS) 50. UPPER SHAFT (8 LOCATIONS)
52. NUT 43. BOLT
40. WASHER
42. NUT (4 LOCATIONS)41. NUT
48.
BOLT
49.
CRANK
47. WASHER
46. NUT
25. LOWER SHAFT
37. BOLT (3 LOCATIONS) 24. BOLT
26. WASHER 53. UPPER BEARING PLATE
27. NUT
34. SEAL 14. WASHER 38. WASHER 35. BEARING (2 LOCATIONS)
39. NUT
29. HINGE 15. NUT CAP COVER (2 LOCATIONS)
36. LOWER HINGE 33. LOWER
HOUSING HINGE ARM
54. BOLT
59. WASHER
12. WASHER (4 LOCATIONS)
55. WASHER
10. BOLT
B (2 LOCATIONS) 56. NUT
Main Entry Door Hinge Arms Figure 401 (Sheet 3)
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747-400 MAINTENANCE MANUAL
(b)
Make sure the seal is applied around the edge of the access panel (9) on the upper hinge for installation.
(c)
Remove the elbow pins (45) from the upper and lower couplings.
(d)
Disconnect the control rod from the crank (49).
(e)
Remove the bolt (23) that attaches the upper shaft (50) to the upper hinge arm (13) and move the upper shaft clear of the hinge arm.
(f)
Remove the bolts (17) that attaches the lower bearing plate (20) to the upper hinge housing (16) and remove the bearing plate.
(g)
Remove the upper hinge arm (13) from the upper hinge housing (16).
F.
Remove the Lower Hinge Arm
S 014-008
(1)
Open the main entry door.
S 494-009
(2)
Attach the sling and apply sufficient tension to release the hinges of the door weight.
S 024-010
(3)
Remove the lower hinge arm.
(a)
Remove the access panels (3 and 6) on the lower hinge, the torque tube (if installed) and the hinge cover (29, Detail A).
(b)
Make sure the seal applies around the edge of the access panel (3) on the lower hinge for installation.
(c)
Remove the elbow pins (45) from the upper and lower couplings.
(d)
Remove the bolts (43, 24) that attach the upper and lower ends of the lower shaft (25) to the lower coupling and the lower hinge arm (33).
(e)
Remove the bolts that attach the upper bearing plate (53) to the lower hinge housing (36).
(f)
Move the lower shaft (25) clear of the lower hinge arm (33).
(g)
Remove the upper bearing plate (53) and the hinge arm from the hinge housing (36).
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747-400 MAINTENANCE MANUAL
TASK 52-11-03-404-011
3. Hinge Arm Installation (Fig. 401)
______________________
A. Special Tools and Equipment
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