| Acronym | Meaning |
| CI | Course (deviation Display) Invalid |
| SER | Serial |
| LV | Load Vertical |
| N/C | Not Critical |
| UC | Unsatisfactory Condition |
| NAC | Nacelle |
| CDI | Course Deviation Indicator |
| PVWS | Planned Value Of Work Scheduled |
| CRSI | Ceramic Reusable Surface Insulation |
| NSS | Nitrogen Supply Subsystem |