| Abbreviation | Definition |
|---|---|
| CHDO | Certificate Holding District Office |
| CHIS | Center Hydraulic Isolation System |
| CHKL | Checklist |
| CHS | Cargo Handling System |
| CI | Cabin Interphone |
| CI | Canopy Interception |
| CI | Chief Inspector |
| CIAA | Cayman Islands Airports Authority |
| CIAL | Christchurch International Airport Limited |
| CIAL | Christchurch International Airport Ltd |
| CIAM | Central Institute of Aviation Motors |
| CIC | Corrosion Inhibiting Compound |
| CIC | Critical Item Controller |
| CIDER | Component Identification and Reliability |
| CIDS | Cabin Intercommunication Data System |
| CIG | Component Inoperative Guide |
| CIMA | Comit?? International de Micro Aviation |
| CIMA | Comité International de Micro Aviation |
| CIO | Cargo Integration Officer |
| CIPR | Cubic Inches Per Revolution |