justme69
But a real smart engineer one would've questioned how it was possible the heater was switched on while on the ground, and quickly realized that the only way was if there was an inop relay or faulty ground/logic system. Tracing it back, would've questioned the ability of the airplane to safely fly until many more sub-systems were checked, specially the TOWS.
Flight safety should not be based on having a real smart engineer.
I would prefer to put my trust in an average engineer who follows the book. I'll let the investigators decide if the book was adequate in ths regard.