TM 1-1520-238-23
6-461
6.107.
MAIN TRANSMISSION INSTALLATION
This task covers:
6.108
Transmission Installation – Install Transmission on Platform.
6.109
Transmission Installation – Install Transmission.
6.110
Transmission Installation – Remove Platform.
6.111
Transmission Installation – Connect Catwalk Area.
6.112
Transmission Installation – Connect Left Side Area.
6.113
Transmission Installation – Connect Right Side Area.
6.107.1. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Airframe adapter kit (item 25, App H)
Light duty laboratory apron (item 27, App H)
11/16 x 3/8-inch drive open end box socket wrench
crowfoot attachment (item 70, App H)
1 x 3/8-inch drive open end box socket wrench
crowfoot attachment (item 77, App H)
9/16 x 1/4-inch drive open end box socket wrench
crowfoot attachment (item 85, App H)
7/8 x 3/8-inch drive open end socket wrench crowfoot
attachment (item 100, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
Transmission
jackscrew
(item 186,
App H)
(p/o item 397, App H) (3)
Sling set kit (item 194, App H)
Adjustable air filtering respirator (item 262, App H)
Rail type trailer (item 396, App H)
Transmission removal kit (item 397, App H)
1 1/4 & 1 5/16-inch open end wrench (item 419, App H)
1 3/16 & 1 1/4-inch open end wrench (item 420, 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:
Packing (2)
Lubricant (item 111, App F)
Lubricant (item 114, App F)
Petrolatum (item 138, App F)
Wire (item 226, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
Two persons to assist
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
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.
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