TM 1–1520–238–T–2
2–32
Table 2–1.
Master Failure Symptom Index (cont)
Failure Symptom
MOC
Reference
CDU DISPLAYS HDG OR AC REF FAIL
MESSAGE (CDU: VAB NEXT TO DISPLAYED
WORD TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS NAV TOP LEVEL PWR UP FD/LS
PAGE (CDU: VAB NEXT TO DISPLAYED
WORDS PWR OFF PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS PITCH/ROLL FAIL MESSAGE
(CDU: VAB NEXT TO DISPLAYED WORD
TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS PROG PLUG NO–GO MESSAGE
(CDU: FD/LS KEY PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS RTA FAIL MESSAGE (CDU: VAB
NEXT TO DISPLAYED WORD TEST
PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS RTA NOT CONNECTED OR
SDCC A/D FAIL MESSAGE (CDU: FD/LS KEY
PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS RTA NOT CONNECTED OR
SDCC A/D FAIL MESSAGE (CDU: VAB NEXT
TO DISPLAYED WORD TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS SDCC CPU MEMORY FAIL
MESSAGE (CDU: VAB NEXT TO DISPLAYED
WORD TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
CDU DISPLAYS SDCC PWR SUPPLY FAIL
MESSAGE (CDU: VAB NEXT TO DISPLAYED
WORD TEST PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
