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"E" Terms and Definitions
| EADI | Electronic Attitude Director Indicator |
| EAT | Estimated Approach Time |
| EBAA | European Business Aircraft Association |
| ECAC | European Civil Aviation Conference |
| ECOGAS | European Council of General Aviation Support |
| ECU | Environmental Control Unit |
| EET | Estimated Elapsed Time |
| EFAS | Electronic Flash Approach Light System |
| EFATO | Engine Failure At (or after) Take-Off |
| EFIS | Electronic Flight Instrument System |
| EGT | Exhaust Gas Temperature (gauge) |
| EHSI | Electronic Horizontal Situation Indicator |
| EICAS | Engine Indicating and Crew Alerting System |
| ELT | Emergency Locator Transmitter |
| Empty Weight | Weight of the basic aeroplane including all fixed equipment, plus unusable fuel, oil, hydraulic and other fluids |
| Encoding Altimeter | an altimeter which gives a digital output to the transponder |
| EOBT | Estimated Off-Blocks Time |
| EPNdB | Effective Perceived Noise Decibel |
| ETA | Estimated Time of Arrival |
| ETD | Estimated Time of Departure |
| ETE | Estimated Time En Route |
| EROPS | Extended Range Operations |
| ETPS | Empire Test Pilots School |
| Eurocontrol | Organisation for coordinating enroute air traffic control in Europe |