TM 1–1520–238–T–3
25–4
25–9 SIGNAL NAME:
PLT SAFE/ARM SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
12–13
(BINARY)
CONDITION:
If the third digit displayed on HOD is 0 or 4=OFF
If the third digit displayed on HOD is 2 or 6=SAFE
If the third digit displayed on HOD is 3 or 7=ARM
SIGNAL FUNCTION:
Selects weapon system status.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to selected switch mode, go to failure symptom index and next
failure paragraph.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–10 SIGNAL NAME:
PLT RKT NORM SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Enables or disables arm/safe power to rockets.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If second digit displayed on HOD is 4, 5, 6, or 7, go to paragraph 25–11.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–11 SIGNAL NAME:
PLT RKT GND STOW SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects pylon position.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If second digit displayed on HOD is 2, 3, 6, or 7, go to Chapter 12, paragraph 12–9.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–12 SIGNAL NAME:
PLT MSL ARMED
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects missile arming.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If second digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 25–13.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–13 SIGNAL NAME:
PLT MSL ENABLE
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates missile was enabled.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If first digit displayed on HOD is 4, 5, 6, or 7, go to Chapter 8, paragraph 8–7.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
