TM 1-1520-238-23
6-72
Change 4
6.12.
INTERMEDIATE GEARBOX CENTRIFUGAL FAN, INPUT COUPLING, AND FLANGE
REMOVAL/INSTALLATION
6.12.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.12.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, 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)
Thin wall socket wrench socket (item 303, App H)
30 - 150 inch-pound 3/8-inch drive click type torque
wrench (item 441, App H)
0 - 75 inch-pound 1/4-inch drive dial indicator torque
wrench (item 446, App H)
Materials/Parts:
Packing
Corrosion preventive compound (item 62A, App F)
Grease (item 88, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
6.11
No. 5 tail rotor drive shaft removed
WARNING
FLIGHT SAFETY PART
The intermediate gearbox 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.
6.12.3. Removal
a. Remove centrifugal fan (1) with attached input
coupling (2) and flange (3) from intermediate
gearbox (4).
(1) Pull fan (1) with attached coupling (2) and
flange (3) out from gearbox (4).
(2) Remove and discard packing (5) from flange
(3) shaft.
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M04-449-1
M04-449-2
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