TM 55-1520-240-23-9
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NEUTRAL RIG CHECK
(Continued)
11-33
Keep movement on aircraft
to minimum; otherwise, false
measurements may result.
44.
Working from aft left work platform, position
protractor (19) on rotor hub (37) above and
parallel to horizontal pin (51). Measure and
record angle of hub. Remove protractor.
45.
Position protractor (19) on vertical pin (50)
parallel to pin (51). Measure and record angle of
pin. Remove protractor.
46.
Check angles measured in steps 44 and 45.
Subtract angle of step 44 from angle of step 45.
Angle must be -0.3º to -0.6º. If not, adjust pitch
link (52) (Task 5-94) then repeat steps 44, 45,
and 46.
47.
Turn rotor hub (37). Position pitch link (53) above
servocylinder (45).
48.
Repeat steps 44 thru 47 for vertical pins (47 and
49).
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