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2-3-37.  Starting in Reversionary Mode.  714A
T55-GA-714A DECU BIT Fault Code List/Matrix (Continued) - TM-1-1520-240-10_49

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
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TM  1-1520-240-10            2-3-11 Table  2-3-1. T55-GA-714A DECU BIT Fault Code List/Matrix The DECU fault code matrix will be consulted when anything other than 88 is displayed on the DECU Hex display during the DECU Pre-Start, Start, or Shutdown BIT checks. The matrix lists DECU fault codes, type of fault, aircraft operational effect, pilot actions require, and overall mission impact. Abort  mission  is  defined  as:  perform  a  normal  engine  shutdown  and  make  appropriate  entries  on  the  DA  Form 2408-13-1. Continue mission is defined as: the crew may complete the present day’s mission but maintenance troubleshooting actions are required prior to the next mission. DECU Fault Code(s) Fault Operational Effect Pilot Action Mission Impact 10 DECU internal hard fault. FADEC light Aircraft won’t start in Primary N/A Abort Mission 11 DECU internal hard fault. FADEC light Aircraft won’t start in Primary N/A Abort Mission 12 DECU internal soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission 13 DECU internal soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission 14 DECU internal soft fault. N/A N/A Continue Mission 15 DECU internal soft fault. N/A N/A Continue Mission 17 DECU internal soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission 18 DECU internal soft fault. Without FADEC light N/A Continue Mission 18 DECU hard fault. With FADEC light N/A Abort Mission 1B DECU internal soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission 1C DECU internal soft fault. Without FADEC light N/A Continue Mission 1C DECU hard fault. With FADEC light N/A Abort Mission 1E DECU internal hard fault. With FADEC light Unable to start in Primary N/A Abort Mission 1F DECU internal hard fault. FADEC light N/A Abort Mission A1 DECU TQ soft fault. N/A Select PTIT Check TQ AC/ DC CBs Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission







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