TM 1–1520–238–T–3
11–4
Change 5
11–6 SIGNAL NAME:
PYLN FLT STOW (ADC)
MEMORY LOCATION: 001214
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects pylon flight stow. If problem exists only in flight, go to Chapter 2,
paragraph 2–5.
REMARKS: From FCC through LH FAB MRTU Type I to external stores controller. Selects pylon flight
stow position.
PASS:
If fifth digit on HOD is 4, 5, 6, or 7, go to paragraph 11–7.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to external stores
controller, external stores controller, MISSION EL DC circuit breaker, wiring from MISSION EL
DC circuit breaker to external stores controller, wiring from external stores controller to pylon
actuator controller. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8).
11–7 SIGNAL NAME:
EXST STAT
MEMORY LOCATION: 001121
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of external stores controller.
REMARKS: From external stores controller through LH FAB MRTU Type I to FCC. Indicates status of
external stores to FCC.
PASS:
If sixth digit on HOD is 1, go to paragraph 11–8.
FAIL: Location of fault: external stores controller, wiring from external stores controller to LH FAB
MRTU Type I, LH FAB MRTU Type I. Troubleshoot wiring to isolate fault
(TM 1–1520–238–T–8).
11–8 SIGNAL NAME:
PYLN EL (ACY) PYLON POS CMD (ACZ)
MEMORY LOCATION: 001175
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD while using the PYLON ACTG SW; memory location response should
increase when up (flight stow) is selected and decrease, then go negative when down
(ground stow) is selected.
SIGNAL FUNCTION:
Contains elevation positioning data.
REMARKS: From FCC through LH FAB MRTU Type I to external stores controller.
PASS:
If CONDITION has been met, go to paragraph 11–9.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to external stores
controller, external stores controller. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8).
11–9 SIGNAL NAME:
PYLN EL RATE (ACY) PYLON RATE CMD (ACZ)
MEMORY LOCATION: 001176
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD while using the PYLON ACTG SW; memory location response should
increase when up (flight stow) is selected and decrease, then go negative when down
(ground stow) is selected.
SIGNAL FUNCTION:
Determines elevation rate. The rate (speed) at which pylons change.
REMARKS: From FCC through LH FAB MRTU Type I to external stores controller.
PASS:
If CONDITION has been met, go to paragraph 11–10.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to external stores
controller, external stores controller, FCC. Troubleshoot wiring to isolate fault
(TM 1–1520–238–T–8).
