TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
379.
Record reading on DVM (55).
380.
Repeat steps 377 thru 379 three times.
Compare recorded readings with first reading.
Readings must be within 0.0500 of first reading
of step 379.
381.
Set VALVE CONTROL (25) to RETRACT.
382.
Set SAS PRESS SYS 1 valve (44) to PRESS.
383.
Set SAS PRESS SYS 1 valve (44) to OFF.
Piston (9) shall return to center position within
1 second.
384.
Record reading on DVM (55).
385.
Repeat steps 382 and 383 three times.
Compare recorded readings with first reading of
step 384. Readings shall be within 0.500.
386.
Set electrical and hydraulic unit controls as
follows:
a.
HIGH PRESS REGULATOR valve (49) to
DECREASE.
b.
HIGH PRESS SHUTOFF valve (48) to
CLOSE.
c.
SOLENOID SHUTOFF switch (35) to CLOSE.
d.
SOLENOID valve (50) to CLOSED.
e.
SAS PRESS SYS 1 valve (44) to VENT.
f.
Push and hold HIGH PRESS RELIEF valve
(53) and LOW PRESS RELIEF valve (54)
for 15 seconds.
g.
SAS PRESS SYS 1 valve (44) to OFF.
h.
RETURN SYS 1 valve (42) to OFF.
387.
Set electrical unit controls as follows:
a.
VALVE CONTROL (25) to NULL.
b.
LINK TEST switch (29) to VALVE.
388.
If no further testing is required, perform normal
shutdown (TM 55-4920-428-13).
END OF CENTERING SPRING TEST
FOLLOW-ON MAINTENANCE:
None
7-472.2
Change 1
