TM 1-1520-240-102-3-14 Table 2-3-1. T55-GA-714A DECU BIT Fault Code List/Matrix (Continued)DECU FaultCode(s)FaultOperational EffectPilot ActionMission ImpactD4DECU internal power sup-ply hard fault.FADEC lightUnable to start in PrimaryN/AAbort MissionD5DECU internal power sup-ply hard fault. DECU inter-nal hard fault.FADEC lightUnable to start in PrimaryN/AAbort MissionD6DECU internal hard fault.REV lightOverspeed system compro-misedUnable to start in Primary andReversionaryN/AAbort MissionD6DECU internal soft fault.Without REV lightN/AContinue MissionD7DECU internal power sup-ply hard fault.FADEC lightUnable to start in PrimaryN/AAbort MissionD8DECU internal soft faultN/AMake an entry onthe DA Form2408-13-1 even iffault code clears.Continue MissionD9DECU internal soft fault.N/AN/AContinue MissionDADECU internal power sup-ply hard/soft fault.With or without REV lightMay be unable to start in Pri-mary and ReversionaryN/AAbort MissionDBDECU Reversionary sys-tem hard/soft fault.With or without REV lightMay be unable to start in Pri-mary and ReversionaryN/AAbort MissionDCDECU internal PTIT softfault.N/AMake an entry onthe DA Form2408-13-1 even iffault code clears.Continue MissionDDDECU overspeed systemsoft fault.N/AN/AContinue MissionDEDECU 400 HZ hard/softfault.With or without REV lightMay be unable to start in Pri-mary and ReversionaryN/AAbort MissionDFDECU internal hard fault.FADEC lightUnable to start in PrimaryN/AAbort MissionE1(DECU Pre-start BITcheck)DECU PTIT soft fault.N/APerform REVmode selectedstart. Switch toPRI when groundidle is achieved.Make an entry onthe DA Form2408-13-1 even iffault code clears.Continue MissionE1(All otherDECU BITchecks)DECU PTIT soft fault.N/AMake an entry onthe DA Form2408-13-1 even iffault code clears.Continue Mission
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