Agreed, it is part of the TR knowledge.
Explained once during the course and then stored in the very far corner of the server room, only to be later revived by LTI during IOE.
It was an item on the 'mandatory training and demonstration topics' on the linetrainings I've seen.
You want to have the FCTM from early on to see which topics the instructors miss altogether.
Last edited by FlightDetent; 17th May 2022 at 15:16.