TM 1-1520-238-23
5-26
Change 7
5.4.
MAIN ROTOR BLADE INSTALLATION
5.4.1. Description
This task covers:
Installation.
5.4.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Electrical tool kit (item 378, App H)
Light duty laboratory apron (item 27, App H)
Chemical protective gloves (item 154, App H)
Sling set kit (item 194, App H)
Multimeter (item 215, App H)
Adjustable air filtering respirator (item 262, App H)
0 - 100 pound spring resiliency tester (item 352, App H)
30 - 150 inch-pound 1/4-inch drive click type torque
wrench (item 435, App H)
Materials/Parts:
Tag lines
Cotton gloves (item 82, App F)
Lubricant (item 114, App F)
Wire (item 222, App F)
Personnel Required:
67R
Attack Helicopter Repairer
Two persons to assist
68X
Armament/Electrical System Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 55-1500-323-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
1.97
Maintenance crane installed
1.100
Crane adjustment - main rotor blade
1.106
Main rotor blade tiedown installed
1.83
Droop stop wedges installed
WARNING
FLIGHT SAFETY PART
The main rotor blade 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.
If hoisted components are allowed to fall, personnel can suffer injury or death. Keep away
from component mounting surfaces and loading crane boom. If injury occurs, seek medical
aid.
CAUTION
Main rotor blades are individually calibrated to de-icing system controller. The de-icing system
controller shall be adjusted any time blades are not installed in same position as removed. Incorrect
de-ice system adjustment will cause damage to heater elements.
AVIBANK main rotor attach pins with a vendor part number 53460 are not authorized for use. Any
pin where the part number cannot be determined should be discarded.
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