| Abbreviation | Definition |
|---|---|
| CMR | Certificate Maintenance Requirment |
| CMR | Certification Maintenance Requirment |
| CMRB | Composite Main Rotor Blade |
| CMS | Cabin Management System |
| CMS | Central Maintenance System |
| CMS | Crew Management System |
| CMSC | Common Motor Start Controller |
| CMSU | Crash Survivable Memory Unit |
| CMT | Cargo Mega Terminal |
| CMV | Converted Meteorological Visibility |
| CNAC | China National Aviation Corporation |
| CNAF | China National Aviation Fuel |
| CNC | Computer Numerically Controlled |
| CND/RTOK | Can-Not-Duplicate/ Retest-Ok |
| CNKIA | Cincinnati Northern Kentucky International Airport |
| CNRA | Central Nebraska Regional Airport |
| CNX | Cancelled |
| CO | COntinental Airlines |
| COAP | Centre of Aviation Photography |
| COC | Certificate Of Conformance |