TM 1–1520–238–T–2
2–34
Change 5
Table 2–1.
Master Failure Symptom Index (cont)
Failure Symptom
MOC
Reference
CDU DOES NOT DISPLAY HBCM ACTIVE PAGE
(CDU: VAB NEXT TO DISPLAYED WORD
START PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DOES NOT DISPLAY HBCM READY PAGE
(CDU: VAB NEXT TO DISPLAYED WORD
HBCM PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DOES NOT DISPLAY HBCM RESULTS
PAGE LINE 1 HBCM NO–GO AND LINE 2
EXCESSIVE MEM (CDU: VAB NEXT TO
DISPLAYED WORD STOP PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DOES NOT DISPLAY NAV SYS TEST IN
PROGRESS MESSAGE (CDU: VAB NEXT TO
DISPLAYED WORD TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DOES NOT DISPLAY PPOS 31T BV 6355
8711 ON LINE 1 AND VAR E000.0 SPH CL6
ON LINE 2 (CDU: NAV FAB PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU EDGE LIGHT DOES NOT GO TO DIM THEN
TO BRT (CPG INTR LT PANEL: R CSL
ROTATED FROM BRT TO DIM THEN BACK
TO BRT)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU EDGE LIGHT DOES NOT LIGHT (CPG INTR
LT PANEL: R CSL CONTROL ROTATED FROM
BRT TO DIM THEN BACK TO BRT)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU INVALID CONFIGURATION IS DISPLAYED
(AN/ASN–137) (ADD)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137 (ADD)
CDU LT BUS NO–GO CPG COMPARTMENT
(ADD)
TM 9–1230–476–20–2
MULTIPLEX
SUBSYSTEM (ADD)
