And, before FOQA the FDR was always fair game.

TWA monitored every leg of every flight except perhaps for the first few years of my career. If they saw what they considered to be an out of parameter operation they would place the data in the affected pilot's mail box along with a buck slip from the chief pilot or a flight manager with a nice, polite reminder to be more careful.

Since I never got one of those it must have been pretty loose.