TM 1-1520-238-23
5-103
5.20.
MAIN ROTOR HUB RETENTION NUT INSTALLATION – continued
(4) Torque 12 bolts (5) to 180 INCH-POUNDS.
Use torque wrench.
l. Accomplish final torque requirement.
(1) Torque 12 bolts (5) to 225 INCH-POUNDS.
Use torque sequence from step f. Use torque
wrench.
(2) Torque 12 bolts (5) to 225 INCH-POUNDS.
(3) Torque 12 bolts (5) to 225 INCH-POUNDS.
m. Ensure that retaining ring (4) is free and float-
ing under bolt (5) heads.
NOTE
Repeat steps e thru l if retaining ring is
not free and floating under bolt heads.
n. Inspect (QA).
o. Lockwire 12 bolts (5) in sets of three. Use wire
(item 225, App F).
p. Inspect (QA).
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