TM 1-1520-238-23
Change 9
5-265
5.61.
TAIL ROTOR HEAD INSTALLATION
M042621
WARNING
FLIGHT SAFETY PART
The tail 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.
Tail rotor head weighs approximately 40 pounds. Two persons are needed for handling. If
injury occurs, seek medical aid.
5.61.3. Installation
CAUTION
The tail rotor gearbox output shaft mounting studs are offset. Do not force tail rotor head on
mounting studs. If binding occurs, remove and realign tail rotor head.
Ignore studs previously marked with an X. This has been found to be an unreliable method to
determine which stud is the #1 stud. Failure to heed this caution could result in damage to equip-
ment.
NOTE
Torque on nuts before application of MWO 1-1520-238-50-46 is 750 INCH-POUNDS. Torque on nuts
after application of MWO 1-1520-238-50-46 is 710 INCH-POUNDS.
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