PTU
Power transfer unit
PCU
Power control unit
ACE
Actuator control electronics
FCM
Flight control module
ASCB
Avionics standard communication bus
EICAS
Engine indication and crew alerting system
IESS
Integrated electronic standby system
The standby peanut
MCDU
Multifunction control display unit
GP
Guidance panel
IDG
Immigrated drive generator
CSD
Constant speed drive
RAT
Ram air turbine
TRU
Transformer rectifier unit
ICC
Integrated control center
SPDA
Secondary power distribution assembly
MAU
Modular aviation unit
FADEC
Fuel authority digital engine control
EDP
Engine driven pump