TM 1-1520-238-23
5-100
5.20.
MAIN ROTOR HUB RETENTION NUT INSTALLATION
5.20.1. Description
This task covers:
Installation.
5.20.2. 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 1/4-inch drive click type torque
wrench (item 435, App H)
0 - 600 inch-pound 3/8-inch drive dial indicator torque
wrench (item 447, App H)
Materials/Parts:
Cloth (item 52, App F)
Lubricant (item 114, App F)
Wire (item 225, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 55-1520-238-MTF
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
WARNING
FLIGHT SAFETY PART
The main rotor hub retention nut is a
flight safety part. Failure to follow
maintenance instructions may result
in serious injury or death of
crewmembers and/or serious damage
to the helicopter.
CAUTION
To prevent damage to main rotor mast,
do not move rotor blade during this task.
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