TM 9-2320-272-24-4
5-86. BONNET ACCESS DOOR MAINTENANCE (Contd)
1.
Remove
twelve screws (1), hinge (2), and seal (21) from door frame (17). Discard seal (21).
2.
Remove
four screws (5) and two angle brackets (4) from inner panel (3).
3.
Remove
four screws (7), rod (8), and holder bracket (6) from inner panel (3).
4.
Remove
screw (11), two nuts (9), screws (12), and bracket (10) from inner panel (3).
NOTE
Assistant will help with step 5.
5.
Remove thirty-three nuts (13), screws (18), seventy-four rivets (19), outer panel (20), three
retainers (14), and seal (16) from door frame (17). Discard seal (16) and rivets (19).
NOTE
Perform step 6 if inner panel is to be replaced (subtask c.).
6.
Remove seventy-four rivets (15) and inner panel (3) from door frame (17). Discard rivets (15).
1.
For general cleaning instructions, refer to para. 2-14.
2.
Inspect hinge (2) for breaks and proper operation. Replace hinge (2) if damaged.
3.
Inspect three retainers (14) for bends and breaks. Replace if bent or broken.
4.
Inspect angle brackets (4), holder bracket (6), and rod (8) for cracks and breaks. Replace if cracked
or broken.
5.
Inspect outer panel (20) for tears and punctures. Replace outer panel (20) if tom or punctured.
6.
Inspect inner panel (3) for tears and punctures. Replace inner panel (3) if torn or punctured.
7.
Inspect door frame (17) for bend, cracks, and breaks. Replace door frame (17) if bent, cracked, or
broken.
NOTE
Insulate areas of dissimilar metal-to-metal contact with zinc
l
chromate primer.
Apply sealing compound to exterior joints prior to installation.
l
Insulate all enclosed structure with fibrous glass felt insulation.
l
l Perform step 1 only if inner panel was removed.
l Assistant will help with steps 1 and 2.
1.
Install inner panel (3) on door frame (17) with seventy-four new rivets (15).
2.
Install new seal (16), three retainers (14), and outer panel (20) on door frame (17) with thirty-three
screws (18), nuts (13), and seventy-four new rivets (19).
3.
Install holder bracket (6) and rod (8) on inner panel (3) with four screws (7).
4.
Install screw (11) and two nuts (9) on bracket (10).
NOTE
Angle bracket can be installed on either side of door.
5.
Install bracket (10) on inner panel (3) with two screws (12).
6.
Install two angle brackets (4) on inner panel (3) with four screws (5).
7.
Install new seal (21) and hinge (2) on door frame (17) with twelve screws (1).
5-550
