TM 1-1520-238-T-7
11–352
Change 5
11–88. STABILATOR – MAINTENANCE OPERATIONAL CHECK (cont)
11–88
Task
Result
p. Reduce airspeed to zero (0) knots
(TM 55-4920-400-13).
q. Remove –9 rig pin from F.S. 165 bellcrank
(fig. 11–128).
r. Push pilot and CPG collective stick (fig.
11–127) to full down position.
s. With Pitot tester connected to right side pitot
tube, remove and seal left side pitot tester
hose. Slowly increase airspeed to obtain
between 148 and 152 knots
(TM 55-4920-400-13). The STAB POS
indicator (fig. 11–126) will move up to 15 2
and MAN STAB indicator (fig. 11–122) will
flash.
t. Reduce airspeed to zero (0) knots
(TM 55-4920-400-13).
u. Pulse pilot ND/NU switch to ND until pilot
STAB POS indicator indicates 35 2 full
down position.
v. Press pilot RESET pushbutton. Verify MAN
STAB indicator (fig. 11–122) goes out and
stabilator moves to 25 2.
If MAN STAB indicator (fig. 11–125) does not go out
and stabilator does not move to 25 2 ND, go to
paragraph 11–104.
w. On CPG collective stick (fig. 11–127), pulse
ND/NU switch between ND and NU and
verify stabilator indicators move both up and
down.
If MAN STAB indicator (fig. 11–125) does not light or
STAB POS indicators do not indicate both UP and
DOWN movement, go to paragraph 11–130.
x. On CPG collective stick (fig. 11–127), press
RESET pushbutton.
