his belief was that shock cooling would kill the engine
doubleyew8,
Quite simply no so --- Butson refused to do as demanded by an FOI, operate the aircraft outside its certified flight envelope as established in the AFM, per CAR 138. -- he wasn't concerned about the life of his engines,
he was concerned about the life of his employees and himself.
Despite the CAAP mentioned in another post, we are still seeing pressure from some FOIs and equally dumb instructors/ATOs to "practice V1 cuts", something that does not exist in most FAR 23 certified aircraft.
As to the "training value" of shutting dowm engines completely (other than at a safe height, say min. 3000' AGL, daylight VMC) it is very clear that the "training value" does not exist --- compared to properly conducted zero thrust simulation of an engine failure.
The toll in dead bodies is there for all to see.