| Acronym | Meaning |
![](file.png) | FDIR | Fault Detection Identification/Isolation And |
![](file.png) | FDIR | Recovery/Recognition |
![](file.png) | FDL | Flight Director Loop |
![](file.png) | FDLN | Feedline |
![](file.png) | FDM | Flight Data Manager |
![](file.png) | FDM | Frequency Data Multiplexer |
![](file.png) | FDM | Frequency Division Multiplexer |
![](file.png) | FDM | Frequency Division Multiplexing |
![](file.png) | FDO | Fee Determination Official |
![](file.png) | FDO | Flight Dynamics Officer |
![](file.png) | FDOR | Flight Design Operations Review |
![](file.png) | FDR | Final Design Review |
![](file.png) | FDR | Flight Data Recorder |
![](file.png) | FDR | Functional Design Review |
![](file.png) | FDRI | Flight Director Rate Indicator |
![](file.png) | FDS | Flight Design And Scheduling |
![](file.png) | FDS | Flight Design System |
![](file.png) | FDS | Flight Dynamics Simulator |
![](file.png) | FDS | Flight Dynamics Software/System |
![](file.png) | FDS | Fluid Distribution System |
![](file.png) | FDS | Functional Design Specifications |
![](file.png) | FDSC | Flight Dynamics Simulation Complex |
![](file.png) | FDSC | Flight Dynamics Situation Complex |
![](file.png) | FDU | Fluid Distribution Unit |
![](file.png) | FDX | Full Duplex |
![](file.png) | FEA | Failure Effects Analysis |
![](file.png) | FEAT | Final Engineering Acceptance Test |
![](file.png) | FEB | Forward Equipment Bay |
![](file.png) | FEC | Field Engineering Change |
![](file.png) | FEC | Forward Events Controller |
![](file.png) | FED | Flight Events Demonstration |
![](file.png) | FEDP | Facility And Equipment Design Plan |
![](file.png) | FEID | Flight Equipment Interface Device |
![](file.png) | FEID | Functional Engineering Interface Device |
![](file.png) | FEM | Finite Element Method |
![](file.png) | FEMCPL | Facilities And Envir- Measurement Comp. Parts List |
![](file.png) | FEP | Floral Ethel Propane |
![](file.png) | FEP | Fluorinated Ethylene Propylene |
![](file.png) | FEP | Front End Processor |
![](file.png) | FERD | Facility And Equipment Requirements Document |
![](file.png) | FES | Flash Evaporator System |
![](file.png) | FES | Flash Evaporator System |
![](file.png) | FES | Flight Element Set |
![](file.png) | FESL | Failure Effects Summary List |
![](file.png) | FET | Field Effect Transistor |
![](file.png) | FET | Flight Elapsed Time |
![](file.png) | FEWG | Flight Evaluation Working Group |
![](file.png) | FF | Flight Forward |
![](file.png) | FF | Flight Forward |
![](file.png) | FF | Flip Flop |