| Acronym | Meaning |
 | NPOS | Power Turbine Overspeed |
| CSOG | Communications Security Operational Group |
| AYB | Accessory Bulletin (tdc 58) |
| WIU | Wing Interface Unit |
| DMI | Depot Maintenance Interservice |
| NTHG | Nothing |
| NAVTRASYSCEN | Naval Training Systems Center |
| YFB | Ferry Boat Or Launch (self-propelled)(misc) |
| MCAF | Marine Corps Air Facility |
| SEB | Support Equipment Bulletin (tdc 63) |
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