TM  1-1520-240-10            2-3-15 Table  2-3-1. T55-GA-714A DECU BIT Fault Code List/Matrix (Continued) DECU Fault Code(s) Fault Operational Effect Pilot Action Mission Impact E2 DECU T1 sensor soft fault. N/A N/A Continue Mission E3 DECU N2A sensor soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission E4 DECU N2B sensor soft fault. N/A Make an entry on the DA Form 2408-13-1 even if fault code clears. Continue Mission E5 DECU N2 sensor differ- ence soft fault. N/A N/A Abort Mission F1 DECU N1A sensor soft fault. Unable to restart the engine in Primary N/A Continue Mission F2 DECU N1B sensor hard/ soft fault. With or without REV light May be unable to start in N/A Abort Mission F3 DECU N1A sensor differ- ence soft fault. N/A N/A Abort Mission F4 DECU fuel flow pot soft fault. Without FADEC light Unable to restart the engine in Primary FADEC light if engine is shut- down N/A Continue Mission F4 DECU fuel flow pot hard fault. With FADEC light Unable to start in Primary N/A Abort Mission F5 DECU step count hard fault. FADEC light Unable to start in Primary N/A Abort Mission F6 DECU PLA pot soft fault. REV light Unable to start in Primary and Reversionary N/A Abort Mission F7 DECU HMA bleed valve solenoid hard fault. FADEC light Bleed band inop N/A Abort Mission F8 HMA PRI/REV solenoid hard fault. FADEC light Unable to start in Primary. May not be able to start in Re- versionary N/A Abort Mission F9 HMA Alternator soft fault. N/A N/A Continue Mission FA Start fuel solenoid/ignition system soft fault. May be unable to start in Pri- mary and Reversionary Ensure that the ignition lock switch in in the ON position Continue Mission FB DECU Reversionary step count soft fault. May be unable to start in Pri- mary and Reversionary N/A Abort Mission FF (on Pre-start BIT check) N/A N/A Move PRI/REV switch to PRI. Then cycle back- up power Continue Mission if 88