TM 1–1520–238–T–3
Change 5
27–5
27–20 SIGNAL NAME:
INS ALTITUDE VALID
MEMORY LOCATION: 002643
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS attitude is valid.
REMARKS: From EGI to FCC.
PASS:
If fifth digit displayed on CDU is 6 or 7, go to paragraph 27–21.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
27–22 SIGNAL NAME:
INS DATA VALID
MEMORY LOCATION: 002643
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS data is valid.
REMARKS: From EGI to FCC.
PASS:
If fourth digit displayed on CDU is 6 or 7, go to paragraph 27–23.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
27–23 SIGNAL NAME:
INS FAILED
MEMORY LOCATION: 002737
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS failure.
REMARKS: From EGI to FCC.
PASS:
If sixth digit displayed on CDU is 0, go to paragraph 27–24.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
27–24 SIGNAL NAME:
INS NOT READY
MEMORY LOCATION: 002737
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS not ready.
REMARKS: From EGI to FCC.
PASS:
If fifth digit displayed on CDU is 0, 1, 2 or 3, go to paragraph 27–25.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
27–25 SIGNAL NAME:
INS SBIT COMPLETE
MEMORY LOCATION: 002737
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS start up BIT is complete.
REMARKS: From EGI to FCC.
PASS:
If fifth digit displayed on CDU is 1, 3, 5 or 7, go to paragraph 27–26.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
27–26 SIGNAL NAME:
INS SBIT STATUS
MEMORY LOCATION: 002737
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates INS start up bit GO or NOGO.
REMARKS: From EGI to FCC.
PASS:
If fourth digit displayed on CDU is 4 or 5, go to paragraph 27–27.
FAIL: Location of fault: Replace EGI (TM 11–1520–238–23–1).
