TM 1-1520-238-23
5-46
Change 5
5.8.
MAIN ROTOR BLADE PHASE ADJUSTMENT – continued
5.8.3. Checking Phase Adjustment
a. Position main rotor blade (1) to be adjusted
over nose of helicopter.
b. Place maintenance platform (2) under tip of
blade (1). Use maintenance platform.
c. Install phasing target (3).
(1) Remove two screws (4) from main rotor blade
tip cap (5).
(2) Install target (3) on tip cap (5) using two
screws (4) from tip cap (5). Use helicopter
rotor head balance and blade tracking test
equipment
CAUTION
To prevent damage to flight control sys-
tems do not use force if binding or rough-
ness occurs while moving controls with
hydraulic power.
d. Apply external primary hydraulic power (para
1.72).
e. Rig lateral bellcrank (6) for level swashplate.
(1) Install -5 rig pin (7) in aft hole (8) of bellcrank
(6) forward of lateral actuator (9). Use rigging
pin set.
f. Rig longitudinal bellcrank (10) for level
swashplate.
(1) Install -5 rig pin (7) in lower hole (11) of bell-
crank (10) forward of longitudinal actuator
(12). Use rigging pin set.
g. Enter pilot station (para 1.56). Observe all
safety precautions.
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