| Acronym | Meaning |
| SCF | Scheduled Change Factor (milestone Modifier) |
| GMS | Gas Management System |
| PROP | Proprotor |
| CFI | Contractor Final Inspection |
| FM | Frequency Modulation |
| WIP | Weight Improvement Program |
| SO | Standing Orders |
| FSCM | Federal Supply Code Manufacturers |
| CTRLRS | Controllers |
| AEMS | Aircraft Engine Management System |