Line check. Who is in command?

[Exaviator]

During a Line Check, the Training/Check Pilot will normally occupy the Jump Seat and is there to assess your operational capabilities and the decisions that you make during the flight. It is usual to use periods of low activity during the flight to pose pertinent questions to assess your overall knowledge of aircraft systems, performance and other areas of technical competence.

You as Captain remain in command of the flight unless relieved of command by the Check Pilot which would normally only happen if you had demonstrated such a low level of competency as to threaten the safety of the flight. This relief of command would have to be justified, and documented on arrival, or return to base.

There have been more than a few incidents/accidents in the past where a senior, or check pilot has been occupying the RHS and a subliminal transfer of command has taken place resulting in confusion as to who is flying the aircraft and making the decisions.