TM 1–1520–238–T–3
15–52
Change 4
15–225 SIGNAL NAME:
TADS I DIR COS TO TEU (ACY) TADS I DIRCOS CMD (ACZ)
MEMORY LOCATION: 001230
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ) (SCALAR)
CONDITION:
Monitor HOD while in LOS operation; memory location response should increase and
decrease with LOS roll movement.
SIGNAL FUNCTION:
Contains roll LOS information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct roll angle, go to paragraph 15–226.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–226 SIGNAL NAME:
TADS J DIR COS TO TEU (ACY) TADS J DIRCOS CMD (ACZ)
MEMORY LOCATION: 001231
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while in LOS operation; memory location response should increase and
decrease with LOS pitch movement.
SIGNAL FUNCTION:
Contains pitch LOS information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct pitch angle, go to paragraph 15–227.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–227 SIGNAL NAME:
TADS K DIR COS TO TEU (ACY) TADS K DIRCOS CMD (ACZ)
MEMORY LOCATION: 001232
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while in LOS operation; memory location response should increase and
decrease with LOS azimuth movement.
SIGNAL FUNCTION:
Contains azimuth LOS information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct azimuth angle, go to Chapter 7, paragraph 7–57.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–228 SIGNAL NAME:
AUTO GYRO ALIGN TO TEU (ACY) AG ALIGN CMD (ACZ)
MEMORY LOCATION: 001246
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates auto gyro align mode from DEK entry.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If fifth digit on HOD is 1, 3, 5, or 7, go to paragraph 15–229.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU, CPG
MRTU, wiring from CPG MRTU to ORT. Troubleshoot wiring to isolate fault
(TM 1–1270–476–T).
