TM 1–1520–238–T–2
2–24
Table 2–1.
Master Failure Symptom Index (cont)
Failure Symptom
MOC
Reference
BACKUP DOES NOT CHANGE TO BACKUP OFF
AND AFTER 3 SECONDS NAV TOP LEVEL
PWR ON PRESENT POSITION PAGE IS NOT
DISPLAYED WITH THE WORD MEMORY ON
DISPLAY LINE 6 (CDU: NEXT TO DISPLAYED
WORD BACKUP PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
BACKUP OFF DOES NOT CHANGE TO BACKUP
ON AND CDU DOES NOT DISPLAY NAV TOP
LEVEL POWER ON PRESENT POSITION
PAGE (CDU: NEXT TO DISPLAYED WORDS
BACKUP OFF PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
BBC IN CONTROL FD/LS NONFUNCTIONAL
POSITION APPEARS ON HOD (CPG FCP:
MUX SWITCH SET TO PRI)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM
BBC IN CONTROL FD/LS NONFUNCTIONAL
POSITION DOES NOT APPEAR ON HOD
(CPG FCP: MUX SWITCH SET TO SEC)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM
BBC IN CONTROL FD/LS NONFUNCTIONAL
POSITION DOES NOT APPEAR ON HOD AND
STANDBY (FLASHING) APPEARS ON HOD
(CPG FCP: MUX SWITCH SET TO SEC AND
CPG CIRCUIT BREAKER PANEL NO. 1: FC
FCC DC CIRCUIT BREAKER CLOSED)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM
BBC IN CONTROL FD/LS NONFUNCTIONAL
POSITION DOES NOT APPEAR ON HOD
(CPG FCP: MUX SWITCH SET TO SEC AND
PRI BUS DETACHED)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM
BBC IN CONTROL FD/LS NONFUNCTIONAL
POSITION REMAINS ON HOD (CPG FCP:
MUX SWITCH SET TO PRI)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM
BINDING OR CHATTERING OCCURS (PILOT
CYCLIC STICK: FORCE TRIM SWITCH SET
TO OFF AND FORE AND AFT MOVEMENT
APPLIED)
TM 1–1520–238–T–7
FLIGHT CONTROL
SYSTEM
