Plain English Meaning

A ground-based machine that mimics flying a real aircraft well enough that the FAA accepts time spent in it as official training. It includes both full-motion simulators and fixed cockpit trainers, depending on how realistic and capable the device is.

Full Definition

A ground-based training device that replicates aircraft systems, instruments, and flight characteristics for pilot training, checking, and currency. A Flight Simulation Training Device (FSTD) is the FAA's umbrella category covering both Full Flight Simulators (FFS) and Flight Training Devices (FTD), each qualified to specific levels under FAA standards. Unlike a basic procedures trainer, an FSTD is formally evaluated and approved, allowing certain training events to count toward certificate, , or recurrent requirements.