TM 11520238T3
132
Change 4
MULTIPLEX READ CODE INTERPRETATIONS
131 SIGNAL NAME:
STAB RATE GYRO 2 (ACY) STAB RATEGYRO RT (ACZ)
MEMORY LOCATION: 002125
MEMORY DATA BIT(S):
419 (ACY) 415 (ACZ)
(SCALAR)
CONDITION:
Monitor the heads out display (HOD) while gyro is spinning up; memory location
response digits should decrease. Note reading.
SIGNAL FUNCTION:
Indicates axis position.
REMARKS: From rate gyro 2 to stabilator control unit 2 (SCU), SCU 2 through DASEC to FCC.
PASS:
If CONDITION corresponds to memory location response, record reading, go to paragraph
132.
FAIL: Location of fault: rate gyro 2, wiring from rate gyro 2 to SCU 2, SCU 2, wiring from SCU 2 to
digital automatic stabilization equipment computer (DASEC), DASEC. Troubleshoot wiring to
isolate fault (TM 11520238T7).
132 SIGNAL NAME:
STAB AIRSPEED TRANSDUCER 2 (ACY) STAB AIRSPEED RT (ACZ)
MEMORY LOCATION: 002122
MEMORY DATA BIT(S):
419 (ACY) 415 (ACZ)
(SCALAR)
CONDITION:
Reading on HOD should be 016760 or greater. Note reading.
SIGNAL FUNCTION:
Indicates 30, 60, 80 knot (KT) transition levels.
REMARKS: From stab airspeed transducer 2 to SCU 2, SCU 2 through DASEC to fire control
computer (FCC).
PASS:
If CONDITION corresponds to memory location response, record reading, go to
paragraph 133.
FAIL: Location of fault: airspeed transducer 2, wiring from airspeed transducer 2 to SCU 2, SCU 2,
wiring from SCU 2 to DASEC, DASEC. Troubleshoot wiring to isolate fault
(TM 11520238T7).
133 SIGNAL NAME:
BOTTOM STAB ACTUATOR POSITION
MEMORY LOCATION: 002115
MEMORY DATA BIT(S):
419 (ACY) 415 (ACZ)
(SCALAR)
CONDITION:
For an actuator failure in extended position, memory response is 077760.
For an actuator failure in retracted position, memory response is 100000.
Slew stabilator. If actuator moves in either direction, record the reading and go to 138.
If memory location does not show increase or decrease, a failure exists.
SIGNAL FUNCTION:
Indicates bottom stabilator actuator position.
REMARKS: From bottom actuator to SCU 2, SCU 2 through DASEC to FCC.
PASS:
If actuator moves in either direction, go to paragraph 134.
FAIL: Location of fault: bottom actuator, wiring from bottom actuator to SCU 2, SCU 2, wiring from
SCU 2 to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 11520238T7).