0014
TM 1-4920-924-13&P
AVIATION SHOP EQUIPMENT CONTACT MAINTENANCE (AV SECM) SYSTEM MAINTENANCE
INSTRUCTIONS FOR STRAP FASTENER LOOPS - (CONTINUED)
8.
At marked measurement (Figure 7, Item 7) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 7).
9.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 2).
10.
On top of rear aluminum rail (Figure 7, Item 2) measure from outside edge of corner casting (Figure 7, Item
1) from left towards right 31.44 inches and from front of aluminum rail (Figure 7, Item 2) towards back 0.75
inches and mark measurement (Figure 7, Item 9).
11.
At marked measurement (Figure 7, Item 9) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 9).
12.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 2).
13.
Remove strap fastener loops (Figure 7, Item 12) and drill one 3/16 inch hole at eight center punched marks
(Figure 7, Item 3, 4, 5, 6, 7, 8, 9 and 10).
14.
Install four strap fastener loops (Figure 7, Item 12) to aluminum rail (Figure 7, Item 2) by installing eight
11/64 inch blind rivets (Figure 7, Item 13) into mounting holes (Figure 7, Item 11) of four strap fastener
loops (Figure 7, Item 12).
15.
On forward facing area of front aluminum rail (Figure 7, Item 22) measure from outside edge of corner casting
(Figure 7, Item 23) from left towards right 10.44 inches and from top of aluminum rail (Figure 7, Item 22)
towards bottom 0.75 inches and mark measurement (Figure 7, Item 21).
16.
At marked measurement (Figure 7, Item 21) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 21).
17.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 22).
18.
On forward facing area of front aluminum rail (Figure 7, Item 22) measure from outside edge of corner casting
(Figure 7, Item 23) from left towards right 17.44 inches and from top of aluminum rail (Figure 7, Item 22)
towards bottom 0.75 inches and mark measurement (Figure 7, Item 19).
19.
At marked measurement (Figure 7, Item 19) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 19).
20.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 22).
21.
On forward facing area of front aluminum rail (Figure 7, Item 22) measure from outside edge of corner casting
(Figure 7, Item 23) from left towards right 24.44 inches and from top of aluminum rail (Figure 7, Item 22)
towards bottom 0.75 inches and mark measurement (Figure 7, Item 17).
22.
At marked measurement (Figure 7, Item 17) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 17).
23.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 22).
24.
On forward facing area of front aluminum rail (Figure 7, Item 22) measure from outside edge of corner casting
(Figure 7, Item 23) from left towards right 31.44 inches and from top of aluminum rail (Figure 7, Item 22)
towards bottom 0.75 inches and mark measurement (Figure 7, Item 15).
25.
At marked measurement (Figure 7, Item 15) position left side mounting hole (Figure 7, Item 11) of strap
fastener loop (Figure 7, Item 12) center on marked measurement (Figure 7, Item 15).
26.
Center punch left and right side mounting hole (Figure 7, Item 11) of strap fastener loop (Figure 7, Item 12)
onto aluminum rail (Figure 7, Item 22).
27.
Remove strap fastener loops (Figure 7, Item 12) and drill one 3/16 inch hole at eight center punched marks
(Figure 7, Item 14, 15, 16, 17, 18, 19, 20 and 21).
28.
Install four strap fastener loops (Figure 7, Item 12) to aluminum rail (Figure 7, Item 22) by installing eight
11/64 inch blind rivets (Figure 7, Item 13) into mounting holes (Figure 7, Item 11) of four strap fastener
loops (Figure 7, Item 12).
00149