12-132.1. INSTALLATION OF NEW CONFIGURATION FRONT RADIO RACK BRACKET (Contd)
Change 1
12-204.3
TM 9-2320-280-20-3
b. Installation
1.
Locate, mark, and drill two 0.440-in. (11.18 mm) diameter holes (12) in plenum panel (11).
2.
Locate, mark, and drill four 0.281-in. (7.1 mm) diameter holes (13) in A beam (1).
3.
Cut two 0.75-in. (2 mm) square holes (15) in floor mat (14) on top of tunnel floor (9).
4.
Using two radio rack mounting brackets (17) as a template, locate, mark, and drill two 0.313-in.
(8 mm) diameter holes (16) in top of tunnel floor (9).
5.
Apply sealant to two holes (12) and two existing holes on plenum panel (11) and four holes (13) on
A beam (1).
1.250 in.
(31.75 mm)
EXISTING HOLES