TM 55-1520-240-23-9
11-137
ADJUST PITCH OR ROLL BALANCE SPRINGS
11-137
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Plumb Bob
Materials:
Masking Tape (E388)
Personnel Required:
Medium Helicopter Repairer
Inspector
Equipment Condition:
Battery Connected (Task 1-39)
Electrical Power On
Hydraulic Power On
Closet Acoustic Blanket Removed (Task 2-107)
Closet Backup Panel Removed (Task 2-2)
1.
Press CENTERING DEVICE RELEASE button
(1) on grip (2) of copilot’s control stick (3). Center
control stick. Release button.
2.
Position plumb bob (4) above and near grip (2).
Hold plumb bob in place by taping cord (5) to
cockpit ceiling (6). Use tape (E388).
3.
Repeat step 1.
4.
Check control stick (3). Stick must remain within
1 inch of forward or aft, and right or left of center
position. If stick does not move, go to step 12. If
stick moves forward or aft perform steps 5 thru
8. If stick moves right or left, perform steps 9
thru 12.
INSPECT
11-599
