DA Decision Altitude
DAC Dual Annular Combustor
D-ATIS Digital Automatic Terminal Information Service
DC Direct Current
DCL Departure Clearance

DGAC Direction Générale de l'Aviation Civile
DH Decision Height
DLIC Data Link Initiation Capability
DMC Display Management Computer
DME Distance Measuring Equipment
DNA Dirección National de Aeronavegabilidad
DO Document Order (RTCA)
DU Display Unit Documentary Unit

EASA European Aviation Safety Agency
ECAM Electronic Centralized Aircraft Monitoring Computer
ED EUROCAE Document
EDTO Extended Diversion Time Operations
EFB Electronic Flight Bag
EFIS Electronic Flight Instrument System
EGPWS Enhanced Ground Proximity Warning System
EGT Exhaust Gas Temperature
EHS Enhanced Surveillance
EIS Electronic Instrument System
ELAC Elevator Aileron Computer
ELT Electronic Locator Transmitter
EMER Emergency
ENG Engine
EPR Engine Pressure Ratio
ESS Essential
ETOPS Extended range operations for two engine aeroplanes (EASA) Extended operations (FAA)
EWD Engine Warning Display

F Fuel
F/CTL Flight Controls
F-PLN Flight Plan
FAA Federal Aviation Administration
FAC Flight Augmentation Computer
FADEC Full Authority Digital Engine Control System

FAF Final Approach Fix
FANS Future Air Navigation System
FAP Final Approach Point
FAR Federal Aviation Regulations
FCDC Flight Control Data Concentrator
FCOM Flight Crew Operating Manual
FCU Flight Control Unit
FD Flight Director
FI Filling Instructions
FLS FMS Landing System
FLX Flex
FM Flight Management
FMA Flight Mode Annunciator
FMGC Flight Management and Guidance Computer
FMGS Flight Management and Guidance System
FMS Flight Management System
FOB Fuel on Board
FPA Flight Path Angle
FPV Flight Path Vector
FQI Fuel Quantity Indication
FU Fuel Used
FWC Flight Warning Computer

G/S Glideslope
GBAS Ground-Based Augmentation System
GEN Generator
GLS GPS Landing System
GNSS Global Navigation Satellite System
GPS Global Positioning System