TM 1-1520-238-23
Change 4
6-89
6.16.
NO. 7 (APU) DRIVE SHAFT AND ANTI-FLAIL SUPPORT REMOVAL/INSTALLATION
6.16.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.16.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
1/4 x 3/8-inch drive box end torque wrench adapter
(item 11, App H)
7/16 x 3/8-inch drive torque wrench adapter (item 22,
App H)
Light duty laboratory apron (item 27, App H)
0.002 - 0.040-inch gap setting gage (item 147, App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
30 - 150 inch-pound 3/8-inch drive click type torque
wrench (item 441, App H)
0 - 30 inch-pound 1/4-inch drive dial indicator torque
wrench (item 445, App H)
Materials/Parts:
Corrosion preventive compound (item 62A, App F)
Sealing compound primer (item 146, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, and L325 opened
15.41
APU upper center and top panels removed
WARNING
FLIGHT SAFETY PART
The No. 7 (APU) drive shaft 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
Exercise care and undertake protective measures when handling or performing any type of maintenance
on drive shafts. All surface areas are critical. Accidental dents or scratches caused by improper handling
may render part unserviceable.
To prevent damage to drive shaft, ensure that work area is clean and that part is placed on a soft and
adequately protected working surface.
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