TM 1–1520–238–T–3
3–18
Change 4
3–77 SIGNAL NAME:
COLL WRAPAROUND SUM INVALID (ACY) CLTV SUMWRAP STAT (ACZ)
MEMORY LOCATION: 002104
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of DASEC collective (vertical) servoactuator drive circuitry.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0, go to paragraph 3–78.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–78 SIGNAL NAME:
YAW MODEL MISTRACK (ACY) YAW MODEL MISTRK (ACZ)
MEMORY LOCATION: 002105
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of tail rotor actuator to respond properly to DASEC
commands.
REMARKS: From DASEC to FCC.
PASS:
If sixth digit displayed on HOD is 0, go to paragraph 3–79.
FAIL: Location of fault: tail rotor actuator, wiring from DASEC to tail rotor actuator. Troubleshoot
wiring to isolate fault (TM 1–1520–238–T–7).
3–79 SIGNAL NAME:
ROLL MODEL MISTRACK (ACY) ROLL MODEL MISTRK (ACZ)
MEMORY LOCATION: 002105
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of lateral (roll) servoactuator to respond properly to DASEC
commands.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–80.
FAIL: Location of fault: lateral (roll) servoactuator, wiring from DASEC to lateral (roll) servoactuator.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–80 SIGNAL NAME:
PITCH MODEL MISTRACK (ACY) PITCH MODEL MISTRK (ACZ)
MEMORY LOCATION: 002105
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates capability of longitudinal (pitch) servoactuator to respond properly to
DASEC commands.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0 or 1, go to paragraph 3–81.
FAIL: Location of fault: longitudinal (pitch) servoactuator, wiring from DASEC to longitudinal (pitch)
servoactuator. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
