TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 4
EXTENSIBLE LINK CROSS FEEDBACK
TRANSDUCER NULL VOLTAGE TEST (SPARE)
NOTE
Tests 2, 3, 4, and 5 MUST be
performed in sequence.
52.
Perform steps 1 thru 40. Check initial control and
valve settings in steps 22 and 23.
53.
Set hydraulic unit controls as follows:
a.
ILCA PRESS SYS 1 valve (1) to VENT.
b.
ILCA PRESS SYS 2 valve (2) to VENT.
c.
SAS PRESS SYS 1 valve (3) to VENT.
d.
SAS PRESS SYS 2 valve (4) to VENT.
e.
RETURN SYS 1 valve (5) to RETURN.
f.
RETURN SYS 2 valve (6) to RETURN.
54.
Set electrical unit controls as follows:
a.
SAS 1 & SAS 2 FUNCTION SELECT switch
(30 & 31) to BALANCE.
b.
SAS 1 & SAS 2 FEEDBACK SELECT switch
(32 & 33) to CROSS.
c.
SAS 1 & SAS 2 LINK TEST switch (38 & 39)
to CROSS FDBK.
d.
SYSTEM SELECT switch (43) to SAS 1.
55.
DVM (58). Reading shall not exceed 0.0180
volts. Record reading.
NOTE
Reading must be recorded. This
reading is needed for other tests.
If reading is greater than 0.0180
volts, extensible link cross feedback
transducer requires adjustment (Task
7-100). Repeat Tests 2, 3, and 4.
55.1. Set electrical and hydraulic unit controls as
follows:
a.
SAS 1 FUNCTION SELECT switch (30) to
CLSD LOOP.
b.
RETURN SHUTOFF valve (47) to FULL
OPEN.
c.
SOLENOID valve (53) to OPEN.
d.
SOLENOID SHUTOFF switch (44) to
OPENED.
e.
Slowly turn HIGH PRESS REGULATOR
valve (52) toward INCREASE until HIGH
PRESS gauge (13) indicates 1500 psi.
7-416
Change 1