Federal Aviation Administration Abbreviations and Acronyms

1. ECR
   Engineering Change Request
2. EDC
   Engineering Document Control
3. EDM
   Electronic Distance Measurement
4. EDM
   Engineering Development Model
5. EDO
   Extended Data Output
6. EDS
   Explosives Detection System
7. EEM
   Electronic Equipment Modification
8. EFAS
   Extended Final Approach Segment
9. EFIS
   Electronic Flight Instrument System
10. EGM
    Earth’s Gravity Model
11. EGNOS
    European Geostationary Navigation Overlay Service
12. EHF
    Extremely High Frequency
13. EIA
    Electronic Industries Association
14. EICAS
    Engine Indicating and Crew Alerting System
15. EIGRP
    Enhanced Interior Gateway Routing Protocol
16. EIRP
    Effective Isotropic Radiated Power
17. EIS
    Environment Impact Statement
18. EL
    Glidepath Angel
19. ELT
    Emergency Locating Transmitter
20. EMC
    Electro-Magnetic Compatibility

Last updated: September 10, 2020 — Total entries: 2,563