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PITCH A–B MISTRACK (ACY) PITCH ACTR MISTRK (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
COLL ACT FAIL (ACY) CLTV ACTR STAT (ACZ) |
TM 1–1520–238–T–3
Change 4
3–21
3–90 SIGNAL NAME:
HARS FAIL (ACY) HARS TEST STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of HARS to supply data to DASEC.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0 or 1, go to paragraph 3–91.
FAIL: Location of fault: refer to Chapter 6, paragraph 6–9.
3–91 SIGNAL NAME:
AIR DATA FAIL (ACY) ADS TEST STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of air data system (ADS) to function properly and to supply
data to DASEC.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, go to paragraph 3–92.
FAIL: Location of fault: refer to Chapter 2, paragraph 2–3.
3–92 SIGNAL NAME:
LONG ACT FAIL (ACY) LONG ACTR STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of longitudinal (pitch) servoactuator to respond correctly to
DASEC commands.
REMARKS: From DASEC to FCC.
PASS:
If fourth digit displayed on HOD is 0, 2, 4, or 6, go to paragraph 3–93.
FAIL: Location of fault: longitudinal (pitch) servoactuator, wiring from longitudinal (pitch) servoactuator
to DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–93 SIGNAL NAME:
LAT ACT FAIL (ACY) LAT ACTR STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of lateral (roll) servoactuator to respond correctly to DASEC
commands.
REMARKS: From DASEC to FCC.
PASS:
If third digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–94.
FAIL: Location of fault: lateral (roll) servoactuator, wiring from lateral (roll) servoactuator to DASEC.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–94 SIGNAL NAME:
DIR ACT FAIL (ACY) DIR ACTR STAT (ACZ)
MEMORY DATA BIT(S):
002106
MEMORY LOCATION: 12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of tail rotor actuator to respond correctly to DASEC
commands.
REMARKS: From DASEC to FCC.
PASS:
If third digit displayed on HOD is 0 or 1, go to paragraph 3–95.
FAIL: Location of fault: tail rotor actuator, wiring from tail rotor actuator to DASEC. Troubleshoot
wiring to isolate fault (TM 1–1520–238–T–7).
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