TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 10
EXTENSIBLE LINK STABILITY TEST (SPARE)
141.
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.
142.
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) towards INCREASE until HIGH
PRESS gauge (13) indicates 1500 psi.
f.
ILCA PRESS SYS 1 valve (1) and ILCA
PRESS SYS 2 valve (2) to PRESS.
g.
Slowly turn HIGH PRESS SHUTOFF valve
(51) to OPEN.
h.
Install dial indicator (9). (Refer to steps 93
thru 95.)
142.1. Install PIN 2 (69) in input arm (61).
143.
Set SAS PRESS SYS 1 valve (3) and SAS
PRESS SYS 2 valve (4) to PRESS.
144.
Turn SAS 1 FUNCTION SELECT switch (30)
through HARD OVER RETRACT BALANCE, and
HARD OVER EXTEND three times. Check dial
indicator (9) for oscillations at BALANCE. There
shall be no oscillation. An overshoot of 0.002 to
0.005 inch is allowed, but link shall stop within
1 second.
144.1. Set SAS 1 FUNCTION SELECT switch to
BALANCE.
7-440
Change 1
