Differences training and related aircraft differences training

This regulation governs two types of training for airline crews and dispatchers moving between similar aircraft:

Differences training covers variations of the same aircraft type (like different Boeing 737 models). It must include relevant ground instruction and flight maneuvers from initial training, unless the FAA determines certain items aren't necessary. The FAA also determines how many training hours are required. This training can be incorporated into initial, transition, upgrade, or recurrent training programs.

Related aircraft differences training is a more streamlined approach for aircraft the FAA designates as "related" (sufficiently similar). Airlines must request FAA approval both for the related aircraft designation and for a training program that addresses the differences. If approved, this allows airlines to modify their standard training requirements for crews transitioning between these related aircraft types.

Both approaches let airlines efficiently train crews on aircraft similarities and differences rather than requiring complete retraining from scratch.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*