TM 1-1520-238-23
10-505
10.121.
FORWARD FUEL CELL NITROGEN INERT BREAKAWAY VALVE
REMOVAL/INSTALLATION
10.121.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
10.121.2. 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)
30 - 150 inch-pound 3/8-inch drive click type torque
wrench (item 441, App H)
Materials/Parts:
Packing
Petrolatum (item 138, App F)
Sealing compound (item 175, 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
10.2
Fuel system safety precautions observed
1.19
Helicopter defueled, SPA method
2.2
Access panel R200 removed
2.93
Right forward side transmission strut re-
moved
12.55
Blade de-ice system controller removed
10.121.3. Removal
a. Enter pilot station (para 1.56). Observe all
safety precautions.
b. On center circuit breaker panel, open ENG
INST, FUEL XFEED, and FUEL XFER circuit
breakers.
c. In upper right corner of utility receptacle cir-
cuit breaker panel in main rotor transmission
compartment R200, open NITROGEN INERT
circuit breaker.
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M04-2974-1
