TM 1–1520–238–T–3
11–2
Change 5
FAILURE SYMPTOM INDEX (cont)
Symptom
Refer to paragraph
PILOT OR CPG CANNOT JETTISON EXTERNAL STORES . . . . . . . . . . . . . . .
11–34
PYLON BORESIGHT NO–GO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–35 (ACY) 11–37 (ACZ)
PYLON BORESIGHT NO–GO RAM CHECKSUM . . . . . . . . . . . . . . . . . . . . . . . . 11–35 (ACY) 11–37 (ACZ)
Personnel Required:
(2)
References:
TM 1–1520–238–T–8
TM 9–1090–208–23–1
TM 9–1090–208–23–2
TM 9–1230–476–20–2
TM 9–1427–475–20
Equipment Conditions:
Ref
Condition
TM 1–1520–238–T–8
Applicable –
TM 9–1090–208–23–2
MAINTENANCE
TM 9–1427–475–20
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
11–1 SIGNAL NAME:
PLT SAFE/ARM
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
12–13
(BINARY)
CONDITION:
If the third digit displayed on heads out display (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:
Indicates pilot fire control panel (FCP) ARM/SAFE switch position.
REMARKS: From pilot FCP ARM/SAFE switch through left–hand (LH) forward avionics bay (FAB)
multiplex remote terminal unit (MRTU) Type I to fire control computer (FCC).
PASS:
If CONDITION corresponds to proper mode for switch position selected, go to
paragraph 11–2.
FAIL: Location of fault: MISSION FC DC circuit breaker, wiring from MISSION FC DC circuit breaker
to external stores controller, 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).
