Different engine type but FADEC related. Was sent software to update test machine, newly developed diesel engine that I said didn't perform right. Drove a machine up a hill until it stalled, then rolled backward and the engine began running - backward. Downloaded the record of my test and sure enough, running poorly but running backward. Emailed engine group who responded that could never happen but they would look at my data. Hear for months until they finally found time to run on a test stand and confirmed, required mechanical and software changes. Always nice to hear software people say that can't happen.