TM 1-1520-238-23
Change 5
6-281
6.64.
MAIN TRANSMISSION ROTOR BRAKE ACTUATOR (GOODYEAR/ABSC)
REMOVAL/INSTALLATION
6.64.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.64.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
9/16 x 1/4-inch drive open end box socket wrench
crowfoot attachment (item 85, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
1/2-inch hexagon x 1/2-inch drive screwdriver socket
wrench attachment (item 321, App H)
700 - 1600 inch-pound 1/2-inch drive click type torque
wrench (item 433, App H)
30 - 200 inch-pound 1/4-inch drive click type torque
wrench (item 436, App H)
Materials/Parts:
Packing (2)
Plug
Hydraulic fluid (item 92, App F)
Personnel Required:
67R
Attack Helicopter Repairer
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
TM 1-1520-238-T
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, and L325 opened
9.40
Helicopter battery connected
WARNING
FLIGHT SAFETY PART
The main transmission 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
Do not intermix manufacturers’ disks and actuators in one assembly. Damage to helicopter will result
if disks and actuators from different manufacturers are intermixed in one assembly.
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