TM 1-1520-238-23
(12-137 blank)/12-138
Change 7
12.43.
NO. 1 ENGINE FIRE EXTINGUISHER FITTING REPLACEMENT
12.43.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
12.43.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
1 x 3/8-inch drive open end socket wrench crowfoot
attachment (item 93, App H)
1 1/16 & 1 1/4-inch open end wrench (item 416, App H)
1 & 1 1/8-inch open end wrench (item 417, App H)
150 - 750 inch-pound 3/8-inch drive click type torque
wrench (item 442, App H)
Personnel Required:
67R
Attack Helicopter Repairer
One person to assist
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, L325, and LN1 opened
12.43.3. Removal
a. Remove fire extinguisher tube (1).
(1) Hold check valve (2). Remove nut (3). Use
open end wrench and crowfoot.
(2) Hold nipple (4). Remove nut (5). Use open
end wrench and crowfoot.
b. Remove fire extinguisher fitting (6) from fire
wall (7).
(1) Hold three screws (8).
(2) Have one person remove three nuts (9) and
washers (10).
c. Remove nipple (4) from fitting (6).
(1) Hold nut (11). Remove nipple (4). Use open
end wrench and crowfoot.
(2) Discard fitting (6).
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