The air transport year started badly. A Yeti Airlines twin-engine ATR 72-500[1] aircraft plunged into a gorge as it was approaching Pokhara International Airport (PKR) in Nepal.
Singapore’s Ministry of Transport (MOT) is supporting Nepalese authorities.
The latest news is that the aircraft’s Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR) have been replayed. It is reported that the analysis of the FDR and CVR data shows that the propellers of both engines were feathered during approach.
It is not known if this was due to the actions of the crew or a technical fault.
The investigation continues.
The propellers on this aircraft type have pitch control of their blades. The pitch of the blades can be changed to the “feather” position (approximately 90 degrees). Feathered blades reduces the drag that would occur in the event of an engine shutdown.
This event occurring while the aircraft is slowing on approach will have an impact on the aircraft’s air speed. Monitoring air speed on approach is vital.
The suspicion that the aircraft may have stalled remains one theory.
The normal actions required on an approach are called up on a checklist.
Example: Here is a video of an ATR 72-500 landing.
Notice the pilots’ hands at 4:57 minutes in.
An incident involving an aircraft of the ATR 72 type on the way from Stockholm to Visby[2] is interesting but may not be relevant in the Yeti Airlines case.
[1] https://skybrary.aero/aircraft/at75
[2] https://www.havkom.se/en/investigations/civil-luftfart/tillbud-med-ett-luftfartyg-av-typen-atr-72-pa-vaeg-fran-bromma-till-visby
John Vincent 
2 Fokker 50. crashed around 20 years ago. Difficult to slow an turboprop in approach…..so sometimes pilots are tempted to fly with the pitch close to the stop beyond the first stop manipulating the pitch. This is a forbidden procedure of course. The analysis will show. Look also at ´canbrook manouevre ´.