Originally Posted by
SASless
212man is correct.
One of the passenger's tether moved the Fuel Shutoff Valve causing the engine to stop.
30 seconds of searching on the internet found numerous news articles quoting the Pilot and NTSB published information confirming that.
The chilling part of the results are accounts of the Go Pro video of the cabin as it sinks into the river with the passengers struggling to remove or cut the harness and tethers.
Indeed - the NTSB report is quite frank about those final seconds and it’s clear those who had to
listen/watch the recordings would have found them pretty traumatic I think. Especially probably having to repeat the process for evidence clarification.