TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 18
EXTERNAL STATIC LEAKAGE (ALL)
346.
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.
347.
Set electrical and hydraulic unit controls as
follows:
a.
Check RETURN SHUTOFF valve (47) is
OPEN.
b.
SOLENOID valve (53) to OPEN.
c.
SOLENOID SHUTOFF switch (44) to OPEN.
d.
RETURN SYS 1 valve (5), RETURN SYS 2
valve (6) to PRESS.
e.
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
VENT.
f.
Slowly turn LOW PRESS REGULATOR valve
(50) towards INCREASE until LOW PRESS
gauge (14) indicates 60 psi.
g.
Slowly turn RETURN BACK PRESS valve
(49) to OPEN.
348.
Observe actuator (11) for 5 minutes. Check for
wetting of external seal and relief valve. Wetting
shall not form 1 drop.
349.
Set electrical and hydraulic unit controls as
follows:
a.
LOW PRESS REGULATOR valve (50) to
DECREASE.
b.
SOLENOID SHUTOFF switch (44) to
CLOSED.
c.
SOLENOID valve (53) to CLOSED.
d.
Press and hold LOW PRESS RELIEF VALVE
(68) until LOW PRESS gauge (14) indicates
0 psi.
e.
RETURN BACK PRESS valve (49) to
CLOSE.
f.
RETURN SYS 1 valve (5) and RETURN SYS
2 valve (6) to RETURN.
7-468
Change 1
