TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 13
RETURN PRESSURE TEST (ALL)
213.
Perform steps 1 thru 40. Check initial control and
valve settings in steps 22 and 23.
NOTE
Tests 2, 3, 4, and 5 MUST be
performed before this test.
214.
Set electrical and hydraulic unit controls as
follows:
a.
Check RETURN SHUTOFF valve (47) is
OPEN.
b.
RETURN SYS 1 valve (5) and RETURN SYS
2 valve (6) to RETURN.
c.
SOLENOID valve (53) to OPENED.
d.
SOLENOID SHUTOFF switch (44) to OPEN.
e.
Slowly turn HIGH PRESS REGULATOR
valve (52) toward INCREASE until HIGH
PRESS gauge (13) indicates 1000 psi.
f.
ILCA PRESS SYS 1 valve (1), ILCA PRESS
SYS 2 valve (2), SAS PRESS SYS 1 valve
(3), and SAS PRESS SYS 2 valve (4) to
PRESS.
g.
Slowly turn HIGH PRESS SHUTOFF valve
(51) to OPEN.
215.
Starting with arm (61) fully outward, perform the
following:
a.
Manually move actuator through one cycle.
b.
Slowly turn RETURN SHUTOFF valve (47)
towards CLOSE while moving input arm (61)
until arm stops moving.
c.
Turn SAS 1 VALVE CONTROL valve (34)
and SAS 2 VALVE CONTROL valve (35) to
EXTEND then RETRACT. Check that HIGH
PRESS gauge (13) indicates 1000 psi.
d.
Let actuator stay in this condition for 5
minutes.
NOTE
Movement of extensible link feedback
linkage after arm stops is normal.
216.
Check for external leakage or signs of damage.
There shall be no leakage or signs of damage.
7-450
Change 1
