TM 1-1520-238-23
7-531
7.139.
BLEED AIR SHUTOFF VALVE/CHECK VALVE REMOVAL/INSTALLATION
7.139.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
7.139.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
1/4 x 1/4-inch drive deep socket wrench socket
(item 296, App H)
5/16 x 1/4-inch drive deep socket wrench socket
(item 301, App H)
10 - 50 inch-pound 1/4-inch drive click type torque
wrench (item 434, App H)
Materials/Parts:
Packing (2)
Damping fluid (item 69, App F)
Grease (item 84, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, and L325 opened
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