| Acronym | Meaning |
| MFHBUMA | Mean Flight Hours Between Unscheduled Maintenance Actions |
| AYC | Accessory Change (tdc 61) |
| CFE | Contractor Furnished Equipment |
| B/U | Backup |
| OFIBL | Oil Filter Impending Bypass Left |
| CSJAG | Crew Station Joint Advisory Group |
| ACB | Aircrew Bulletin (tdc 67) |
| NSCCA | Nuclear Safety Cross-check Analysis |
| DIFAR | Directional Frequency And Ranging (asw) |
| MCBF | Mean Cycles Between Failures |