TM 1-1520-238-23
Change 2
5-173
5.37.
MAIN ROTOR FEATHERING BEARING HOUSING REMOVAL/INSTALLATION
5.37.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
5.37.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
3/4 x 1/2-inch drive socket wrench adapter (item 5,
App H)
Light duty laboratory apron (item 27, App H)
Chemical protective gloves (item 154, App H)
18 - 30-inch telescoping x 3/4-inch drive socket wrench
handle (item 161, App H)
Adjustable air filtering respirator (item 262, App H)
15/16 x 1/2-inch drive deep socket wrench socket
(item 297, App H)
3-piece spatula set (item 337, App H)
100 - 500 foot-pound 3/4-inch drive click type torque
wrench (item 438, App H)
Materials/Parts:
Cloth (item 52, App F)
Corrosion preventive compound (item 62, App F)
Lubricant (item 114, App F)
Methyl ethyl ketone (item 124, App F)
Sealing compound (item 177, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
5.32
Main rotor lead lag link bearing retainer and
rotor hub bearing removed
5.25
Main rotor pitch housing removed
WARNING
FLIGHT SAFETY PART
The main rotor feathering bearing
housing 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 and failure of strap
pack lamination, do not scratch or stretch
strap packs when removing feathering
bearing housing.
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M04-240-3
