TM 1-1520-238-23
10-539
10.129.
NITROGEN INERTING UNIT (NIU) COOLING AIR INLET HOSE
REMOVAL/INSTALLATION
10.129.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
10.129.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 9-1090-208-23
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access panel R200 re-
moved
1.22
Fuel system vented
TM 9-1090-208-23
Ammo storage magazine
removed
10.129.3. Removal
a. Enter pilot station (para 1.56). Observe all
safety precautions.
b. On pilot center circuit breaker panel, open
ENG INST, FUEL XFEED, and FUEL XFER cir-
cuit 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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M04-2986-1
A
