I do seem to remember a K a few years back departing the runway to get a closer look at the tacan or ILS hut, following the instructor demo of a 3 engine abort. That was with an OCU instructor captain on the nosewheel never mind a newly qualified co-pilot.
They never even used to let D CAT (LCR) Copilots land when you had pax on, never mind land and steer!