I have never flown an AW 139 but worked alongside a few.
Reported by a pax that the left hand pilot’s window was jettisoned shortly after the problems started.
Photo on the ground after landing.
If the off/idle/fly switches were working that is interesting. But trying to control power and RPM by switching between idle and fly would be very problematic indeed.
Why would the manual throttles not work? When all aircraft power was lost the engines should have “Frozen” at the last selected power. I say SHOULD Have.
CVR/FDR will be interesting if they did have power to record events.
This is a very strange event.
Very glad all are OK.