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DASEC STATUS WORD ASE BIT (ACY) DASE BIT STATUS (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
AD REF VOLTAGE FAIL (ACY) ADA REF STAT (ACZ) |
TM 1–1520–238–T–3
3–14
Change 4
3–58 SIGNAL NAME:
COLL SAS SOL DISC INVALID (ACY) CLTV SAS SOL STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of collective stability augmentation system (SAS) solenoid.
REMARKS: From collective (vertical) servoactuator through DASEC to FCC.
PASS:
If fourth digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–59.
FAIL: Location of fault: collective (vertical) servoactuator, wiring from collective (vertical)
servoactuator to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–59 SIGNAL NAME:
YAW SAS SOL DISC INVALID (ACY) YAW SAS SOL STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of directional SAS solenoid.
REMARKS: From directional (yaw) servoactuator through DASEC to FCC.
PASS:
If fourth digit displayed on HOD is 0 or 1, go to paragraph 3–60.
FAIL: Location of fault: directional (yaw) servoactuator, wiring from directional (yaw) servoactuator to
DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–60 SIGNAL NAME:
ROLL SAS SOL DISC INVALID (ACY) ROLL SAS SOL STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of roll SAS solenoid.
REMARKS: From lateral (roll) servoactuator through DASEC to FCC.
PASS:
If fourth digit displayed on HOD is 0, go to paragraph 3–61.
FAIL: Location of fault: lateral (roll) servoactuator, wiring from lateral (roll) servoactuator to DASEC,
DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–61 SIGNAL NAME:
PITCH SAS SOL DISC INVALID (ACY) PITCH SAS SOL STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of pitch SAS solenoid.
REMARKS: From longitudinal (pitch) servoactuator through DASEC to FCC.
PASS:
If third digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–62.
FAIL: Location of fault: longitudinal (pitch) servoactuator, wiring from longitudinal (pitch) servoactuator
to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
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