| Acronym | Meaning |
 | ED | Engineering Development |
 | LONG | Longitude |
 | PQS | Personnel Qualification Standard |
 | CETS | Contractor Engineering And Technical Services |
 | FD/LC | Fault Detection/location Subsystem |
 | PACL | Power Assurance Check Left |
 | VSI | Vertical Speed Indicator |
 | SEU | System Electronics Unit |
 | AIMD | Aircraft Intermediate Maintenance Dept |
 | EFR | Equipment Facility Requirements |