TM 1-1520-238-T-7
11–110
11–12.
FLIGHT CONTROL SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
11–12
WARNING
Maintenance personnel must be warned verbally prior to moving the
collective or cyclic stick. Any control activated can result in sudden blade
movement that can sever or crush fingers or hands.
CAUTION
If controls bind, check problem prior to continuing procedure. Failure to
clear controls of binding may result in sheared pins in the control axis.
NOTE
If TRIM circuit breaker (pilot center circuit breaker panel) (fig. 11–46) does
not stay closed, go to paragraph 11–16 if in FORCE TRIM ON,
paragraph 11–17 if in FORCE TRIM OFF, or paragraph 11–18 if in FORCE
TRIM RELEASE.
1. Complete maintenance operational check as follows:
Task
Result
a. With collective friction off, move pilot
collective stick (fig. 11–54) full up and down.
If collective stick does not move up and down
smoothly (excessive force required) or is binding,
visually check the collective stick guide for corrosion
or other substances which may inhibit stick
movement. If such substance is found, remove it and
repeat the collective stick movement check. If no such
substance is found, check collective adjustment (part
of pilot or CPG collective stick assembly installation in
TM 1-1520-238-23).
If collective stick does not travel full up and down to
the respective stop, go to paragraph 11–19.
b. With collective friction off, move pilot
collective stick to mid position. Apply
collective friction.
If collective stick does not remain in position, check
the collective friction adjustment.
