TM 1-1520-238-23
5-54
5.10.
MAIN ROTOR BLADE DROOP ANGLE MEASUREMENT
5.10.1. Description
This task covers:
Measurement.
5.10.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Sling set kit (item 194, App H)
Rigging pin set (item 224, App H) (p/o item 390,
App H)
Protractor assembly (item 238, App H)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
One person to assist
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, and L325 opened
1.62
Rotor brakes unlocked
1.72
External hydraulic power applied
1.97
Maintenance crane installed
1.100
Crane adjustment - main rotor blade
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.
Application of hydraulic power could cause injury to personnel. Make certain all switches
and controls are in safe condition before applying hydraulic power. Inform all persons
working on helicopter that hydraulic power is to be applied.
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