TM 1–1520–238–T–3
12–2
Change 5
FAILURE SYMPTOM INDEX (cont)
Symptom
Refer to paragraph
INCORRECT NUMBER OF ROCKETS REMAINING IN EACH ZONE OF P4
12–47
CANNOT SELECT ROCKET TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–49
CANNOT EMERGENCY JETTISON EXTERNAL STORES . . . . . . . . . . . . . . . .
12–54
Personnel Required:
(2)
References:
TM 1–1270–476–T
TM 1–5855–265–T
TM 9–1090–208–23–2
TM 9–1230–476–20–2
TM 9–1270–221–23
TM 9–1427–475–20
TM 11–1520–238–23–2
Equipment Conditions:
Ref
Condition
TM 9–1090–208–23–2
AERIAL ROCKET
CONTROL SYSTEM –
MAINTENANCE
OPERATIONAL CHECK in
progress
NOTE
All multiplex read code responses are read from right to
left.
Multiplex read codes must be used in conjunction with
applicable Maintenance Operational Check (MOC) in
progress.
Multiplex read codes are observed on the HOD (ADC) or
CDU (ADD).
MULTIPLEX READ CODE INTERPRETATIONS
12–1 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 fire control panel (FCP) through left–hand (LH) forward avionics bay (FAB)
multiplex remote terminal unit (MRTU) Type I to fire control computer (FCC).
PASS:
If third digit displayed on heads out display (HOD) corresponds to the setting of pilot FCP
SAFE/OFF/ARM switch, go to paragraph 12–2.
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).
