0014
TM 1-4920-924-13&P
AVIATION SHOP EQUIPMENT CONTACT MAINTENANCE (AV SECM) SYSTEM MAINTENANCE
INSTRUCTIONS FOR STRAP FASTENER LOOPS - (CONTINUED)
4.
On forward facing area of front aluminum rail (Figure 13, Item 40) measure from outside edge of corner
casting (Figure 13, Item 43) from left towards right 17.51 inches and from top of aluminum rail towards bottom
0.75 inches and mark measurement (Figure 13, Item 39).
5.
At marked measurement (Figure 13, Item 39) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 39).
6.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 40).
7.
On forward facing area of front aluminum rail (Figure 13, Item 40) measure from outside edge of
corner casting (Figure 13, Item 43) from left towards right 29.51 inches and from top of aluminum rail
(Figure 13, Item 40) towards bottom 0.75 inches and mark measurement (Figure 13, Item 37).
8.
At marked measurement (Figure 13, Item 37) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 37).
9.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 40).
10.
On forward facing area of front aluminum rail (Figure 13, Item 40) measure from outside edge of
corner casting (Figure 13, Item 43) from left towards right 41.51 inches and from top of aluminum rail
(Figure 13, Item 40) towards bottom 0.75 inches and mark measurement (Figure 13, Item 35).
11.
At marked measurement (Figure 13, Item 35) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 35).
12.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 40).
13.
Remove strap fastener loops (Figure 13, Item 3) and drill one 3/16 inch hole at eight center punched marks
(Figure 13, Item 34, 35, 36, 37, 38, 39, 41 and 42).
14.
Install four strap fastener loops (Figure 13, Item 3) to aluminum rail (Figure 13, Item 40) by installing eight
11/64 inch blind rivets into mounting holes (Figure 13, Item 2) of four strap fastener loops (Figure 13, Item 3).
15.
On top of rear aluminum rail (Figure 13, Item 9) measure from outside edge of corner casting (Figure 13, Item
4) from left towards right 5.51 inches and from front of aluminum rail (Figure 13, Item 9) towards back 0.75
inches and mark measurement (Figure 13, Item 5).
16.
At marked measurement (Figure 13, Item 5) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 5).
17.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 9).
18.
On top of rear aluminum rail (Figure 13, Item 9) measure from outside edge of corner casting (Figure 13, Item
4) from left towards right 17.51 inches and from front of aluminum rail (Figure 13, Item 9) towards back 0.75
inches and mark measurement (Figure 13, Item 7).
19.
At marked measurement (Figure 13, Item 7) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 7).
20.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 9).
21.
On top of rear aluminum rail (Figure 13, Item 9) measure from outside edge of corner casting (Figure 13, Item
4) from left towards right 29.51 inches and from front of aluminum rail (Figure 13, Item 9) towards back 0.75
inches and mark measurement (Figure 13, Item 10).
22.
At marked measurement (Figure 13, Item 10) position left side mounting hole (Figure 13, Item 2) of strap
fastener loop (Figure 13, Item 3) center on marked measurement (Figure 13, Item 10).
23.
Center punch left and right side mounting hole (Figure 13, Item 2) of strap fastener loop (Figure 13, Item 3)
onto aluminum rail (Figure 13, Item 9).
24.
On top of rear aluminum rail (Figure 13, Item 9) measure from outside edge of corner casting (Figure 13, Item
4) from left towards right 41.51 inches and from front of aluminum rail (Figure 13, Item 9) towards back 0.75
inches and mark measurement (Figure 13, Item 12).
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