ETX  End-of-transmission 
EUR  European 
Eurocae  European Organization for Civil Aviation Electronics. 
A regulatory agency for avionics certification in 
Europe. 
EURO- European Organization for the Safety of Air Navigation 
CONTROL  Operations 
EVS  Enhanced Vision Systems 
F 
FAA  (1) Federal Aviation Administration (U.S.) 
(2) Federal Aviation Authority 
FAC  Flight Augmentation Computer 
FADEC  Full Authority Digital Electronic Control 
FAF  Final Approach Fix 
FAI  First Article Inspection 
FAATC  FAA Technical Center 
FADE  FAA-Airline Data Exchange 
FADEC  Full Authority Digital Electronic Control 
FANS  Future Air Navigation System 
Fan Marker  A marker beacon used to provide identification of 
positions along airways. Standard fan marker pro-
duces an elliptical-shaped pattern. A second type pro-
duces a dumbbell-shaped pattern. 
FAR  Federal Aviation Regulation 
FAST  Final Approach Spacing Tool 
FBL  Fly By Light 
FBW  Fly By Wire 
FCAF  Flight Data Acquisition 
FCC  (1) Federal Communications Commission 
(2) Flight Control Computer 

FCDC  Flight Critical dc 
FCP  Flight Control Panel 
FD  (1) Flight Director 
(2) Final Data 
FDAF  Flight Data Acquisition Function 
FDAU  Flight Data Acquisition Unit 
FDB  Flight Plan Data Bank