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

TM 1–1520–238–T–2 Change 6 2–15 Table 2–1. Master Failure Symptom Index (cont) Failure Symptom MOC Reference APU HOLD CIRCUIT BREAKER (CB10) DOES NOT STAY CLOSED (PILOT ELEC PWR PANEL: BATT/EXT PWR SWITCH SET TO EXT PWR) TM 1–1520–238–T–6 CIRCUIT PROTECTION SYSTEM (DC EMERGENCY BUS – PILOT STATION) APU ON INDICATOR IS NOT LIGHTED TM 1–1520–238–T–6 AC ELECTRICAL POWER GENERATION APU ON INDICATOR IS NOT LIGHTED 60 SECONDS AFTER APU START TM 1–1520–238–T–8 AUXILIARY POWER UNIT APU RUNS AND APU NO–GO OVERSPEED APPEARS ON HOD TM 1–1520–238–T–8 AUXILIARY POWER UNIT APU RUNS, PTO CLUTCH DOES NOT ENGAGE AND APU GO APPEARS ON HOD TM 1–1520–238–T–8 AUXILIARY POWER UNIT APU RUNS, PTO CLUTCH DOES NOT ENGAGE AND APU NO–GO UNDERSPEED APPEARS ON HOD TM 1–1520–238–T–8 AUXILIARY POWER UNIT APU START SEQUENCE DOES NOT BEGIN (PILOT APU FIRE TEST PANEL: 95%/ NORM SWITCH SET TO 95%) TM 1–1520–238–T–8 AUXILIARY POWER UNIT ARC–201A DOES NOT HOLD PRESET CHANNEL OR HOLD FILL WHEN POWER REMOVED (ADI) TM 11–1520–238–23–2 VHF AM–FM AN/ARC–186 AND AN/ARC–201A RADIO SETS (ADI) ARC–201A PANEL LIGHTING – NOT ON (ADI) TM 11–1520–238–23–2 VHF AM–FM AN/ARC–186 AND AN/ARC–201A RADIO SETS (ADI) ARC–201A RADIO TRANSMIT POWER (PILOT) – IS LOW (ADI) TM 11–1520–238–23–2 VHF AM–FM AN/ARC–186 AND AN/ARC–201A RADIO SETS (ADI) ARC–201A RECEIVE AUDIO (PILOT) – IS NOT PRESENT IN EITHER HEADSET (ADI) TM 11–1520–238–23–2 VHF AM–FM AN/ARC–186 AND AN/ARC–201A RADIO SETS (ADI)