TM 1–1520–238–T–3
7–7
7–21 SIGNAL NAME:
PLT DEU TEST CMD
MEMORY LOCATION: 001626
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors DEU test CMD.
REMARKS: From DEU through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if fifth digit on HOD is 1, 3, 5, or 7: wiring between pilot DAP and DEU.
Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: DEU, wiring from DEU to RH FAB MRTU Type I, RH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
7–22 SIGNAL NAME:
PLT DAP STATUS
MEMORY LOCATION: 001530
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors display adjust panel (DAP) bit status.
REMARKS: From DAP through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if sixth digit on HOD is 1, 3, 5, or 7: wiring between DEU and pilot DAP.
Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: pilot DAP, wiring from pilot DAP to RH FAB MRTU Type I, RH FAB MRTU
Type I. Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
7–23 SIGNAL NAME:
PILOT RIGHT SSU STATUS
MEMORY LOCATION: 001571
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors pilot right sensor surveying unit (SSU).
REMARKS: From pilot right SSU to SEU through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if fifth digit on HOD is 0, 1, 2, or 3: wiring from pilot IHU to SEU. Troubleshoot
wiring to isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: pilot right SSU, wiring from right SSU to SEU, SEU,wiring from SEU to RH
FAB MRTU Type 1, RH FAB MRTU Type 1. Troubleshoot wiring to isolate fault
(TM 9–1270–221–23).
7–24 SIGNAL NAME:
PILOT LEFT SSU STATUS
MEMORY LOCATION: 001571
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors pilot left SSU.
REMARKS: From pilot left SSU to SEU through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if fifth digit on HOD is 0, 1, 4, or 5: wiring from pilot IHU to SEU. Troubleshoot
wiring to isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: pilot left SSU, wiring from left SSU to SEU, SEU,wiring from SEU to RH FAB
MRTU Type 1, RH FAB MRTU Type 1. Troubleshoot wiring to isolate fault
(TM 9–1270–221–23).
