TM 1-1520-238-23
11-931
11.216.
LINEAR VARIABLE DIFFERENTIAL TRANSDUCER (LVDT) ADJUSTMENT
11.216.1. Description
This task covers:
Adjustment.
11.216.2. Initial Setup
Tools:
Electrical tool kit (item 378, App H)
Multimeter (item 215, App H)
Aircraft power unit (item 232, App H)
Flight control rigging kit (item 267, App H)
0 - 75 inch-pound 1/4-inch drive dial indicator torque
wrench (item 446, App H)
Materials/Parts:
Wire (item 222, App F)
Personnel Required:
68X
Armament/Electrical System Repairer
68X3F
Armament/Electrical System Repairer/
Technical Inspector
References:
TM 1-1520-238-T
TM 55-1500-323-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
1.70
External electrical power
applied
TM 1-1520-238-T
Flight controls rigging op-
erational check for desired
system performed
1.72
External primary hydraulic
power connected
11.216.3. Adjustment
a. Apply external primary hydraulic power (para 1.72).
b. Install rig pins as required.
(1) To adjust collective LVDT; install rig pins (TM 1-1520-238-T).
(2) Adjust longitudinal LVDT; install rig pins (TM 1-1520-238-T).
(3) Adjust lateral LVDT; install rig pins (TM 1-1520-238-T).
(4) Adjust directional LVDT; install rig pins (TM 1-1520-238-T).
c. Remove external primary hydraulic power (para 1.72).
d. Enter pilot station (para 1.56). Observe all safety precautions.
e. Open ASE DC circuit breaker on pilot center circuit breaker panel.
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