TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 5
NO. 1 AND NO. 2 EXTENSIBLE LINK PHASE TEST
(SPARE)
NOTE
Tests 2, 3, 4, and 5 MUST be
performed in sequence.
59.
Perform steps 1 thru 40. Check initial control and
valve settings in steps 22 and 23.
59.1. Set electrical and hydraulic unit controls as
follows:
a.
EXTERNAL METER SELECT switches (40
and 41) to SELF FDBK.
b.
SYSTEM SELECT switch (43) to SAS 1.
c.
BITE switch (42) to +20V.
d.
SQ WAVE control (36 and 37) to MINIMUM.
e.
LINK TEST switches (38 and 39) to SELF.
f.
FUNCTION SELECT switches (30 and 31)
to CLSD LOOP.
g.
FEEDBACK SELECT switches (32 and 33)
to SELF.
h.
VALVE CONTROLS (34 and 35) to NULL.
i.
SOLENOID VALVE (53) to OPEN.
j.
SOLENOID SHUTOFF switch (44) to OPEN.
59.2. Apply test stand hydraulic pressure of 1500 psi.
59.3. Set hydraulic unit controls as follows:
a.
Check that the RETURN SHUTOFF valve
(47) is fully OPEN.
b.
Slowly turn HIGH PRESS REGULATOR
valve (52) towards INCREASE until HIGH
PRESS gauge (13) indicates 1500 psi.
c.
Slowly open HIGH PRESS SHUTOFF valve
(51).
d.
RETURN SYS 1 valve (5) to RETURN.
e.
RETURN SYS 2 valve (6) to RETURN.
f.
ILCA PRESS SYS 1 valve (1) to PRESS.
g.
ILCA PRESS SYS 2 valve (2) to PRESS.
59.4. Install PIN 2 (62) in input arm (61) through fixture
(70).
59.5. Set SAS PRESS SYS 1 valve (3) to PRESS.
59.6. Set SAS PRESS SYS 2 valve (4) to VENT.
7-418
Change 1
