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CPG WPN TRIG 2ND DETENT (ACY) CPG TRIG 2ND DTT (ACZ) | Up
TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Multiplex Read Codes Manual | Next
PLT SIGHT SELECT SW |
TM 1–1520–238–T–3
Change 4
5–9
5–24 SIGNAL NAME:
ORT WPN TRIG DET 1 TO TEU (ACY) ORT TRIG 1ST TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has pulled ORT weapon trigger to first detent. This test
performed during TADS FD/LS maintenance test, on ground only, to allow TEU
to test ORT switches.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If second digit displayed on HOD is 0, 1, 2 or 3, go to paragraph 5–25.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 9–1090–208–23–2).
5–25 SIGNAL NAME:
ORT WPN TRIG DET 2 TO TEU (ACY) ORT TRIG 1ST TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has pulled ORT weapon trigger to second detent. This test
performed during TADS FD/LS maintenance test, on ground only, to allow TEU
to test ORT switches.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If second digit displayed on HOD is 0, 1, 4, or 5, go to paragraph 5–26.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
5–26 SIGNAL NAME:
ORT GUN WAS TO TEU (ACY) ORT GUN WAS TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Issues ORT gun weapon action switch (WAS) signal to TEU. This test
performed during TADS FD/LS maintenance test, on ground only, to allow TEU
to test ORT switches.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If first digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 5–27.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
5–27 SIGNAL NAME:
PLT HAS GUN
MEMORY LOCATION: 001530
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates pilot has control of gun.
REMARKS: From GTCB through RH FAB MRTU Type I to FCC.
PASS:
If second digit displayed on HOD is 2, 3, 6, or 7, go to paragraph 5–28.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to GTCB, GTCB, wiring from GTCB to RH
FAB MRTU Type I, RH FAB MRTU Type I. Troubleshoot wiring to isolate fault
(TM 9–1090–208–23–2).
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