BTC
Bus tie connector
NBPT
No break power transfer
ETC
Essential tie connectors
DCTC
DC tie connector
FMU
Fuel metering unit
ATS
Air turbine starter
SCV
Starter control valve ( controlled by FADEC)
FADEC
Full authority digital engine control
PMA
Permanent magnet alternator
ATTCS
Automatic takeoff thrust control system
PCU
Power control unit
P- ACE
Primary actuator control electronics
FCM
Flight control module
FBW
Fly by wire
FCS
Flight control system
ACE
Actuator control electronics
PBIT
Power up built in test
ETC
Elevator thrust compensation
AFU
Artificial feel
Units
S-ACE
Secondary actuator control electronics
TLA
Thrust lever angle
ADS
air data system
ADSP
Air data smart probe
ADA
Air data applications