TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 17
EXTERNAL DYNAMIC LEAKAGE TEST (SPARE)
317.
Perform steps 1 thru 40. Check initial control and
valve settings in steps 22 and 23.
CAUTION
Tests 2, 3, 4 and 5 MUST be
performed before this test; otherwise,
damage to equipment may result.
318.
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 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 full OPEN.
319.
If dial indicator (9) is not installed, go to steps
93 thru 95.
319.1. Install PIN 2 (69) in input arm (61).
320.
Set SAS 1 FUNCTION SELECT switch (30) to
SQ WAVE.
321.
Set SAS 1 SQ WAVE control (36) to MIN.
322.
Set SAS PRESS SYS 1 valve (3) to PRESS.
323.
Slowly turn SAS 1 SQ WAVE control (36) toward
MAX until indicator (9) indicates about 0.30 inch
travel.
323.1. Allow link to complete 50 cycles minimum.
Check for 1 drop per 50 cycles at the extensible
link output seal.
NOTE
If leakage exceeds 1 drop in 50
cycles, replace seals or extensible
link.
324.
Set SAS 1 FUNCTION SELECT switch (30) to
CLSD LOOP.
325.
Set SAS PRESS SYS 1 valve (3) to VENT then
to OFF.
Change 1
7-465
