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HARS FAIL (ACY) HARS TEST STAT (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
BUCS TRACER FAIL (ACY) BUCS TRACER STAT (ACZ) |
TM 1–1520–238–T–3
3–22
Change 4
3–95 SIGNAL NAME:
COLL ACT FAIL (ACY) CLTV ACTR STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of collective (vertical) servoactuator to respond correctly to
DASEC commands.
REMARKS: From DASEC to FCC.
PASS:
If third digit displayed on HOD is 0, go to paragraph 3–96.
FAIL: Location of fault: collective (vertical) servoactuator, wiring from collective (vertical)
servoactuator to DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–96 SIGNAL NAME:
ASE CONTROL PANEL FAIL (ACY) ASE CONT PNL STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of all control panel switches to function properly.
REMARKS: From DASEC to FCC.
PASS:
If second digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–97.
FAIL: Location of fault: ASE control panel, wiring from ASE control panel to DASEC. Troubleshoot
wiring to isolate fault (TM 1–1520–238–T–7).
3–97 SIGNAL NAME:
26 VAC A FAIL (ACY) 26VAC XFMR1 STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of 26 VAC A output from transformer T1.
REMARKS: From DASEC to FCC.
PASS:
If second digit displayed on HOD is 0 or 2, go to paragraph 3–98.
FAIL: Location of fault: Transformer 1 (T1) or, on aircraft serial effectivity numbers 88–0199 and
subsequent, replace transformer/filter assembly (TM 1–1520–238–23).
3–98 SIGNAL NAME:
26 VAC B FAIL (ACY) 26VAC XFMR2 STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of 26 VAC B output from transformer T2.
REMARKS: From DASEC to FCC.
PASS:
If second digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–99.
FAIL: Location of fault: Transformer 2 (T2) or, on aircraft serial effectivity numbers 88–0199 and
subsequent, replace transformer/filter assembly (TM 1–1520–238–23).
3–99 SIGNAL NAME:
28 VDC BUCS FAIL (ACY) 26VDC BUCS STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of 28 VDC BUCS power.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0 or 1, go to paragraph 3–100.
FAIL: Location of fault: BUCS circuit breaker, wiring from circuit breaker to DASEC, DASEC.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
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