TM 1-1520-238-23
10-518
Change 7
10.124.
NITROGEN INERTING UNIT (NIU) REMOVAL/INSTALLATION
10.124.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
10.124.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Electrical tool kit (item 378, App H)
Multimeter (item 215, App H)
30 - 150 inch-pound 3/8-inch drive click type torque
wrench (item 441, App H)
Materials/Parts:
Sealing compound (item 175, App F)
Tape (item 208, App F)
Personnel Required:
68X
Armament/Electrical System Repairer
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 9-1090-208-23
TM 55-1500-323-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
1.22
Fuel system vented
2.2
Access panel R200 re-
moved
TM 9-1090-208-23
Ammunition storage maga-
zine removed
10.124.3. 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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M04-2976-1
