Nothing really changed after that either,
Well it did - sort of. Ansett Friendships and Viscounts acquired a Rootes blower overheat warning light to be precise. I recall on the F.27 if you got a warning the method of determining if it was for real or not was to check the spill valve outlet for sparks; difficult on a bright sunny day and impossible on the ANSW -500's where the outlet was on the outboard side of the engine nacelle...