Matt Whiting wrote:

To show him what an instrument approach looks like? If the instructor
was qualified and current, this shouldn't have been a problem.
Descending below minimums is the problem, it doesn't matter who is
flying or who is in the right seat.

Matt

He may not have been far from his minimums if he was flying the ILS. DA
for the ILS was 639 MSL, and based on the accident report, combined with
terrain elevations north of the approach end, and 75' tree height, he
may have impacted the tree at about 610 MSL. This would have been
possible if he was below glideslope, and then initiated go-around at his
DA (DH). He would have had some height loss expected before the aircraft
responded.

JPH