TM 1–1520–238–T–3
Change 4
6–5
6–15 SIGNAL NAME:
HARS MAGHDG
MEMORY LOCATION: 002162
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while moving aircraft or HARS; 0 degrees=000000,
180.000 degrees=100000, 359.999 degrees=177777.
SIGNAL FUNCTION:
Monitors HARS magnetic heading.
REMARKS: From HARS through DASEC to FCC.
PASS:
Location of fault if conditions are met: wiring between HARS and aft avionics matrix module.
Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC, wiring from HARS to pilot
horizontal situation indicator (HSI), wiring from HARS to CPG radio magnetic indicator (RMI),
wiring from HARS to signal data converter (SDC), SDC. Troubleshoot wiring to isolate fault
(TM 11–1520–238–23–2).
6–16 SIGNAL NAME:
HARS PITCH
MEMORY LOCATION: 002201
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while moving HARS up and down along pitch axis; positive number
relates to upward pitch angle and negative number relates to downward pitch angle.
SIGNAL FUNCTION:
Monitors HARS pitch angle.
REMARKS: From HARS through DASEC to FCC.
PASS:
If conditions are met go to paragraph 6–17.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC, SDC, wiring from SDC to
HARS. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).
6–17 SIGNAL NAME:
HARS PITCH RATE
MEMORY LOCATION: 002163
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while moving HARS up and down along pitch axis; positive number
relates to upward acceleration and negative number relates to downward acceleration.
SIGNAL FUNCTION:
Monitors HARS pitch rate.
REMARKS: From HARS through DASEC to FCC.
PASS:
Location of fault if conditions are met: wiring between aft avionics module and remote attitude
indicator (RAI). Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
6–18 SIGNAL NAME:
HARS ROLL
MEMORY LOCATION: 002157
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while banking HARS side to side along roll axis; positive number relates
to right roll angle and negative number relates to left roll angle.
SIGNAL FUNCTION:
Monitors HARS roll.
REMARKS: From HARS through DASEC to FCC.
PASS:
If conditions are met, go to paragraph 6–19.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC, SDC, wiring from SDC to
HARS, wiring from CPG RAI to HARS. Troubleshoot wiring to isolate fault
(TM 11–1520–238–23–2).
