TM 1-1520-240-10
2-3-13
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
B6
DECU ECL soft fault.
N/A
N/A
Abort Mission
B7
DECU PLA hard/soft fault.
With or without REV light
Unable to start in Primary or
Reversionary
N/A
Abort Mission
B9
DECU cold junction com-
pensation (CJCV) soft
fault.
N/A
Make an entry on
the DA Form
2408-13-1 even if
fault code clears.
Continue Mission
BA
DECU internal soft fault.
N/A
N/A
Continue Mission
BB
DECU internal soft fault.
N/A
N/A
Continue Mission
BC
DECU 400 Hz hard/soft
fault.
With or without REV light
N/A
Abort Mission
C1
DECU communication soft
fault.
N/A
N/A
Continue Mission
C2
DECU communication soft
fault.
N/A
N/A
Continue Mission
C3
DECU communication soft
fault.
N/A
N/A
Continue Mission
C4
DECU communication soft
fault.
Unable to TQ share
Switch to PTIT
sharing
Continue Mission
C5
DECU communication soft
fault.
N/A
N/A
Continue Mission
C6
DECU communication soft
fault.
N/A
N/A
Continue Mission
C7
DECU communication soft
fault.
N/A
N/A
Continue Mission
More than
two codes,
C1 through
C7
DECU communication link
redundancy failure.
N/A
N/A
Abort Mission
C8
DECU communication link
failure.
N/A
N/A
Abort Mission
C9
DECU N1 from the other
engine fails.
Unable to N1 load share
N/A
Continue Mission
CF
DECU load share hard
fault.
FADEC light
Primary mode failed
N/A
Abort Mission
D0
DECU overspeed system
soft fault.
Overspeed system compro-
mised
N/A
Continue Mission
D1
DECU P3 sensor soft
fault.
Loss of surge protection
N/A
Abort Mission
D2
DECU P1 sensor hard
fault.
With FADEC light
N/A
Abort Mission
D2
DECU P1 sensor soft
fault.
Without FADEC light
N/A
Continue Mission
D3
DECU internal soft fault.
N/A
N/A
Continue Mission
