| Acronym | Meaning |
| O/I | Outboard/inboard |
| LH | Left Hand |
| OODA | Object-oriented Design With Assemblies |
| QEC | Quick Engine Change (tdc 03) |
| IND | Indicator |
| SACG | Selective Antenna Coupler Group |
| AFC | Airframe Change (tdc 50) |
| SEU | Sighting Electronics Unit |
| IC | Integrated Circuit |
| IECMS | In Flight Engine Condition Monitoring System |