TM 1-1520-238-T-7
11–346
Change 5
11–88. STABILATOR – MAINTENANCE OPERATIONAL CHECK (cont)
11–88
Task
Result
(3) On pilot and CPG STAB POS
indicators (fig. 11–126), check that OFF
flags are not visible.
If OFF flag on pilot STAB POS indicator is visible, go
to paragraph 11–100.
If OFF flag on CPG STAB POS indicator is visible, go
to paragraph 11–100.
POS
STAB
10
30
20
DEG
0
10
DN
M70-198
OFF
FLAG
Figure 11–126.
STAB POS Indicator
To prevent damage to stabilator during movement, be sure stabilator is
clear of all obstructions before proceeding.
CAUTION
NOTE
The pulsing of the ND/NU switch will be done only enough to verify
upward/downward movement of the stabilator.
Position assistant to observe and verify stabilator actuator piston
movement during stabilator ND/NU movement.
(4) On pilot collective stick (fig. 11–127):
(a) Pulse ND/NU switch to NU to verify
upward movement.
(b) Pulse ND/NU switch to NU until
STAB POS indicator (fig. 11–126)
indicates full up position (9 2).
If stabilator does not move up, go to paragraph
11–133.
If top piston fails to move stabilator (only bottom
piston of actuator moves), go to paragraph 11–101.
If bottom piston fails to move stabilator (only top
piston of actuator moves), go to paragraph 11–102.
If pilot and CPG STAB POS indicators do not indicate
9 2 NU, go to paragraph 11–100.
If stabilator does not move to within 9 2 NU, refer to
TM 1-1520-238-23 to rerig stabilator.
