the chance it will suddenly and without warning, fail is basically zero
BPF
Excellent points but cannot agree with the above statement! I had an engine failure in an almost new Seneca Five! The engine went after takeoff at grosse weight in the climb out at 200 feet.
Very bad vibration and yaw but as the engine was still producing a small amount of power and I instinctively knew pulling it would mean a certain descent I kept the thing going one hand ready on the prop lever!
I struggled to 800 feet agl by which time the vibrations were so bad I had no further choice but to feather and shut down the unit,
A circuit at 800 feet and successful landing.
One of the PAX was a keen movie maker and filmed the whole takeoff engine power clearly visible!
Continental declared it must be over boost on takeoff as three rocker shafts had sheared clean off!
The film proved otherwise! The engine was removed for examination and an admittance from continental that all the rocker shafts had been mistakenly over torqued at manufacture! A complete new unit arrived on warranty within 2 weeks.
While I take your point on mismanagement engines do fail unilaterally especially pistons and that shows in stats comparing pistons to turbines which are far more reliable.
Pace