TM 55-1520-240-23-4
5-9.1
ROTARY-WING HEAD RETAINING NUT TORQUE CHECK (Continued)
5-9.1
WARNING
Rotary-wing blades can seriously
injure personnel. Make sure area
around helicopter is clear of personnel
before moving blades.
CAUTION
To prevent dropping and damaging
rotor head, use two men when
installing reaction adapter.
NOTE
The retaining nut torque must be
checked following the first flight after
rotary-wing head installation.
Procedure is same for forward or aft
rotary-wing heads.
1.
Check cockpit controls to ensure thrust control
is in the ground detent position.
2.
Remove nine screws (1) and washers (2).
3.
Remove retainer (3), cover (4) and packing (5).
4.
Remove retaining ring (6) and tang washer (7).
NOTE
Use grease pencil to mark a line on
nut (9) and socket (8).
5.
Position socket (T29) (8) on hub retaining nut (9).
NOTE
For forward head, install adapter with
marking FWD ROTOR THIS SIDE UP
on top. For aft head, install adapter
with marking AFT ROTOR THIS SIDE
UP on top.
Change 2
5-69
