I'm guessing the reporter was following speculation someone put him onto. Second hand accounts of engine anomalies? Past hot performance conflicts and/or mountain rotor upsets, undisclosed if so. Tragic mystery.
This attached item appeared today. In German obviously but if you care to scroll through the pictures, it's pretty clear the aircraft was in impeccable condition. Ju-Air's chief pilot claims 100% confidence in the transport's safety and owes it to the company's 160 employees to continue. He goes on to mention families of victims who are urging him to restart as soon as possible. No date for which has been set.
https://www.20min.ch/schweiz/news/st...trieb-17134978