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.
17.
Position protractor (19) on fixed swashplate (27).
Align protractor with LCT actuator (28) and LCT
connecting link (29). Measure and record angle
of swashplate. Remove protractor.
NOTE
Make sure the protractor is not turned
180º after angle is recorded for
swashplate and moved to rotor shaft.
Maintain same orientation when
measuring rotor shaft.
18.
Position protractor (19) on top of rotor shaft
(30). Align protractor with actuator (28) and link
(29). Measure and record angle of rotor shaft.
Remove protractor.
19.
Check angles measured in steps 17 and 18.
Step 17 angle must be less than step 18 angle.
Subtract angle of step 17 from angle of step 18.
Angle must be 1.0º to 1.4º. If not, adjust LCT
fixed connecting link (Task 11-210), then repeat
steps 17, 18, and 19.
11-115
