TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
36.
Slowly open HIGH PRESSURE SHUTOFF valve
(51), manually cycle ILCA input arm (61) through
full travel, approximately 20 cycles.
NOTE
Repeat step 36 if squealing sound is
heard during the last cycle of step 36.
It indicates that air is still trapped in
the inner boost section of the ILCA.
37.
Bleed extensible links (pitch, roll, and yaw only).
Set switches as follows:
a.
FUNCTION SELECT switches (30 and 31) to
SQ WAVE.
b.
Set SQ WAVE CONTROL (36 and 37) to
mid-travel and allow link to complete 20
cycles.
c.
Deleted.
d.
Deleted.
e.
Deleted.
NOTE
Repeat step 37 if squealing sound is
heard during the last cycle of step 37.
It indicates that air is still trapped in
the extensible link section of the ILCA.
38.
Set hydraulic unit controls as follows:
a.
HIGH PRESS REGULATOR valve (52) to
DECREASE.
b.
HIGH PRESS SHUTOFF valve (51) to
CLOSE.
c.
SOLENOID valve (53) to CLOSED.
e.
SAS PRESS SYS 1 valve (3) to OFF.
d.
SAS PRESS SYS 2 valve (4) to OFF.
f.
Set ILCA PRESS SYS 1 valve (1) to OFF.
g.
Set ILCA PRESS SYS 2 valve (2) to OFF.
h.
Return SYS 1 valve (5) to OFF.
i.
Return SYS 2 valve (6) to OFF.
38.1. Set electrical unit controls as follows:
a.
SOLENOID SHUTOFF switch (44) to CLOSE.
b.
Power switch (29) to OFF.
39.
Lockwire caps (55 and 56). Use lockwire (E231).
40.
Perform applicable Test 1 thru 18 as required.
40.1. Deleted.
INSPECT
END PRELIMINARY PROCEDURE
FOLLOW-ON MAINTENANCE:
Test 1 thru 21 as required.
Change 1
7-411
