TM 1–1520–238–T–3
Change 4
7–11
7–37 SIGNAL NAME:
PILOT BRSIT REQD
MEMORY LOCATION: 001571
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Provides indication that pilot IHADSS BRSIT is required.
REMARKS: From SEU through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if third digit on HOD is 4, 5, 6, or 7: wiring between pilot FCP and RH FAB
MRTU Type I. Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: go to paragraph 7–40.
7–38 SIGNAL NAME:
PLT SIGHT SEL SW
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
4–7
(HEX)
CONDITION:
If sixth digit displayed on HOD is 1 and fifth digit is 3=HMD
If sixth digit displayed on HOD is 1 and fifth digit is 5=PNVS
If sixth digit displayed on HOD is 1 and fifth digit is 6=TADS
If sixth digit displayed on HOD is 1 and fifth digit is7=STBY
SIGNAL FUNCTION:
Selects pilot sight reference.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION displayed on HOD corresponds to selected PLT SIGHT SEL switch position,
go to paragraph 7–39 (ACY) or 7–39A (ACZ).
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).
7–39 SIGNAL NAME:
PLT/CPG ACQ SW (ACY)
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects slaving and cueing to CPG line of sight (LOS).
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If fourth digit on HOD is 0, 1, 2, or 3, go to paragraph 7–30.
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).
7–39A SIGNAL NAME:
PLT ACQ SEL SW (ACZ)
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
8–9
(BINARY)
CONDITION:
If fourth digit on HOD is 3=CPG
If fourth digit on HOD is 5=NVS FIXED
If fourth digit on HOD is 7=OFF
SIGNAL FUNCTION:
Selects slaving and cueing to CPG line of sight (LOS).
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION displayed on HOD corresponds to selected PLT ACQ SEL switch, go to
paragraph 7–30.
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).
