Table 2–1. Master Failure Symptom Index (cont)

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