"Patty" wrote
Does anyone here have an ATR from the old days? I ask cos I
understand that if a pilot possesses an ATR (airline transport rating)
as opposed to an ATP certificate, he/she could flight instruct
without having to take flight instructor's course.

This is one of the reasons that Certificated Flight Instructor was changed
to Authorized Flight Instructor. ATPs are still authorized to instruct
without holding a Flight Instructor Certificate, but only within the Air
Transprtation Service.

Bob Moore
ATP ASMEL B-707 B-727 L-188
PanAm (retired)