TM 1–1520–238–T–2
2–4
Change 1
Table 2–1.
Master Failure Symptom Index (cont)
Failure Symptom
MOC
Reference
ADF TRANSFORMER ASSEMBLY NAV CIRCUIT
BREAKER (CB95) DOES NOT STAY CLOSED
TM 11–1520–238–23–2
AUTOMATIC
DIRECTION FINDER
(ADF) AN/ARN–149
ADMIN PWR OFF PAGE IS NOT DISPLAYED
(CDU: VAB NEXT TO DISPLAYED WORD
ADMIN PRESSED)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–137
ADS INDICATOR LIGHTS (PILOT ANTI ICE
PANEL: PITOT ICE DET AD SNSR SWITCH
SET TO OFF)
TM 9–1230–476–20–2
AIR DATA SYSTEM
ADS INDICATORS DO NOT LIGHT (PILOT
FORWARD CIRCUIT BREAKER PANEL: NAV
AIR DATA DC CIRCUIT BREAKER OPENED)
TM 9–1230–476–20–2
AIR DATA SYSTEM
ADS INDICATORS REMAIN LIGHTED (PILOT
CENTER CIRCUIT BREAKER PANEL: NAV AIR
DATA DC CIRCUIT BREAKER CLOSED)
TM 9–1230–476–20–2
AIR DATA SYSTEM
AFT AVIONICS BAY FAN IS NOT OPERATING
TM 1–1520–238–T–8
ENVIRONMENTAL
CONTROL SYSTEM
AFT CLOSED INDICATOR IS LIGHTED
(REFUELING PANEL: LVL CONT VALVES AFT
TNK SWITCH SET TO OPEN)
TM 1–1520–238–T–7
PRESSURE
REFUELING/
DEFUELING
AFT CLOSED INDICATOR IS NOT LIGHTED
(REFUELING PANEL: LVL CONT VALVES AFT
TNK SWITCH SET TO CLOSE)
TM 1–1520–238–T–7
PRESSURE
REFUELING/
DEFUELING
AFTER 15 SECONDS THE FIRST TWO
POSITIONS OF THE LEFT DISPLAY DO NOT
INDICATE GO (CPG DPLR NAV PANEL: MODE
SWITCH SET TO TEST)
TM 11–1520–238–23–2
DOPPLER
NAVIGATION
SYSTEM (DNS)
AN/ASN–128
AFTER 2 SECONDS TEST, JAM AND GO
INDICATORS DO NOT LIGHT AND STAY
LIGHTED FOR 3 SECONDS (PILOT
INSTRUMENT PANEL: JAM/TEST/GO/ NO–GO
INDICATOR MOMENTARILY PRESSED AND
RELEASED)
TM 11–1520–238–23–2
RADAR JAMMER
SYSTEM
AN/ALQ–136
