TM 55-1520-240-23-9
11-34
ARTIFICIAL FEEL FORCES CHECK
(Continued)
11-34
PITCH AND ROLL CONTROL
NOTE
If artificial feel is out of limits, adjust
pitch or roll balance springs (Task
11-137) or troubleshoot system (TM
55-1520-240-T).
5.
Install strap (13) at second grip (14) position on
pilot’s stick (11). Use strap (E376).
6.
Attach dial indicating scale (15) to strap (13).
7.
Have helper in passageway check output rod
(16) of pitch ILCA (17) for movement.
NOTE
Forward breakout force will be greater
than aft breakout and be within
max/min limits.
8.
Position scale (15) aft of grip (14). Apply force
aft at grip, 90º to grip. Measure force when rod
(16) starts to move. Force must be 1.80 to 2.50
pounds.
9.
Position scale (15) forward of grip (14). Apply
force forward at grip, 90º to grip. Measure force
when rod (16) starts to move. Force must be
1.80 to 2.50 pounds.
10.
Repeat step 4.
11.
Position scale (15) aft of grip (14). Apply force aft
at grip, 90º to grip. Measure force until rod (16)
stops moving. Force must be 2.3 to 5.0 pounds.
12.
Position scale (15) forward of grip (14). Apply
force forward at grip, 90º to grip. Measure force
until rod (16) stops moving. Force must be 4.0 to
8.6 pounds.
13.
Tape button (10) in pressed position. Use tape
(E388).
14.
Check indicator (12) is at N, with stick (11)
upright.
15.
Repeat steps 8 and 9. Force must be 0.25 to
0.75 pounds.
16.
Repeat steps 11 and 12. Force must be 0.25
to 1.50 pounds.
17.
Remove tape from button (10).
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