TM 55-1520-240-23-9
11-33
NEUTRAL RIG CHECK
(Continued)
11-33
Keep movement on aircraft
to minimum; otherwise, false
measurements may result.
29.
Working from forward left work platform, position
protractor (19) on rotor hub (37) above and
parallel to horizontal pin (42). Measure and
record angle of hub. Remove protractor.
30.
Position protractor (19) on vertical pin (41)
parallel to pin (42). Measure and record angle of
pin. Remove protractor.
31.
Check angles measured in steps 29 and 30.
Subtract angle of step 29 from angle of step 30.
Angle must be -3.4 to -3.7º. If not, adjust pitch
link (43) (Task 5-94) then repeat steps 29, 30,
and 31.
32.
Turn rotor hub (37). Position pitch link (36) above
servocylinder (39).
33.
Repeat steps 29 thru 32 for vertical pins (33 and
40).
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