TM 1–1520–238–T–3
12–18
Change 4
12–51A SIGNAL NAME:
RCP RANGE SELECT (ACZ)
MEMORY LOCATION: 001161
MEMORY DATA BIT(S):
12–19
(HEX)
CONDITION:
(None)
SIGNAL FUNCTION:
0.0 to 9.9 kilometers.
REMARKS: From RCP to FCC.
PASS:
If range agrees with selected setting, go to paragraph 12–52.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to RCP, RCP.
Troubleshoot wiring to isolate fault (TM 9–1090–208–23–2).
12–52 SIGNAL NAME:
RKT FIRE IN PROGRESS
MEMORY LOCATION: 001160
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Is true when time of flight is displayed on HOD.
REMARKS: From RCP to FCC.
PASS:
If fourth digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 12–53.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to RCP, RCP.
Troubleshoot wiring to isolate fault (TM 9–1090–208–23–2).
12–53 SIGNAL NAME:
RKT FIRE INHIBIT CMD (ACY) RKT FIRE ENABLE (ACZ)
MEMORY LOCATION: 001214
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Inhibits rocket firing (ACY). Enables rocket firing (ACZ).
REMARKS: From FCC through LH FAB MRTU Type I to RCP.
PASS:
Location of fault if the sixth digit displayed on HOD is 0: station director, wiring from station
director to rocket launcher, rocket launcher. Troubleshoot wiring to isolate fault
(TM 9–1090–208–23–2) (ACY).
Location of fault if the sixth digit displayed on HOD is 1: station director, wiring from station
director to rocket launcher, rocket launcher. Troubleshoot wiring to isolate fault
(TM 9–1090–208–23–2) (ACZ).
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to RCP, RCP.
Troubleshoot wiring to isolate fault (TM 9–1090–208–23–2).
12–54 SIGNAL NAME:
EMER STORES JETT SW
MEMORY LOCATION: 001532
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Jettisons external stores on pylons.
REMARKS: Hardwired from pilot and CPG collective sticks, through emergency Stores Jettison Panel
to pylons.
PASS:
Location of fault if the third digit displayed on HOD is 0, 1, 4, or 5: MISSION JETT circuit
breaker, wiring from MISSION JETT circuit breaker to pilot STORES JETT panel, pilot
STORES JETT panel. Troubleshoot wiring to isolate fault (TM 9–1090–208–23–2).
FAIL: Location of fault: pilot and/or CPG collective stick, wiring from collective stick to Stores Jettison
Panel, Stores Jettison Panel, wiring from Stores Jettison Panel to pylons. Troubleshoot wiring
to isolate fault (TM 9–1090–208–23–2).
