| Abbreviation | Definition |
|---|---|
| EPC | External Power Contactor |
| EPCS | Electronic Propulsion Control System |
| EPGSS | Electric Power Generation and Start System |
| EPIRB | Emergency Position-Indicating Radio Beacon |
| EPR | Engine Pressure Ratio |
| EPSU | Emergency Power Supply Unit |
| EQDs | Elite Qualifying Dollars |
| ERA | Equipment Restraint Area |
| ERAM | En Route Automation Modernisation |
| ERD | Embraer ERJ-140 aircraft flown by American Airlines |
| ERLT | Easy Race Lap Timer |
| ERS | Earth Reference System |
| ERU | Engine Run-Up |
| ESIC | Electrical System Indication Control |
| ESIC | Electrical System Indication & Control |
| ESPM | Electrical Standard Practice Manual |
| ESS | Engine Section Stator |
| ESS | Engine Section Stators |
| ETD | Estimated Time of Departure |
| e-ticket | Electronic ticket |