The pilot broke the rules and paid for it. There's going to be hell about this - neither Thielert or Diamond will back down. A 1.7ms power transient should be tolerable - losing both engines because of it is ridiculous, as are the electrically dependent engines. I can just imagine the Thielert engineers saying 'Now, how do we create a weak link in the engine design?'
Eureka! Aircraft engines that need electricity to continue running
Now there's no doubt the DA42 is a great aircraft even after the abortive promotion specs, but this is ridiculous, and it's one thing I don't understand about flying and aircraft manufacturers in general - why don't they think of these things in the first place? With all the money they've spent you'd think someone would go 'What if this happens?'
Out of curiosity - are there any other commercial aviation powerplants that require electricity to continue running? Can't think of any offhand.