[QUOTE=ATC Watcher;10733784]No, the Ju-Air 52 accident of 2018 is different . The investigation is still ongoing but the interim last report mentioned the probability of high temp and density altitude trying to clear a pass in the mountains. Since then a video appeared taken by a mountaineer showing the aircraft falling down after what looked like a stall.
The Swiss TSB issued a second intermediate report in November 2018, mentioning corrosion and cracks, but said they were not related to the accident.. But in March 2019,the FOCA (Swiss regulator) quote : "banned Ju-Air from conducting commercial passenger flights with Ju 52s, allowing only private flights for club members. It was deemed that historical aircraft such as the Ju 52 no longer meet current safety requirements for commercial passenger transport" .
Following this the Lufthansa Board decided to definitively ground their own Ju52 which was operating similar passenger flights since years...QUOTE]
I seem to remember the inquiry showing less than adequate engine performance, but have no idea whether that was maintenance related. Nevertheless, the inquiry did suggest a shoestring effort, held together by the love of the volunteers.
That is not sufficient imho for a passenger service, even on historic aircraft.