Yeti Airlines Crash

[AviatorInsight]

One of the consequences with feathering is the engine torque will also reduce to prevent the engine over torque due to reduced propellor load from the feathering. How long would it have taken for engine torque to increase if feathering was corrected? I can't imagine it would be instant

I can’t say how long but yes it definitely would have taken some time to come out of feather and spool up again. It is definitely not instant.

 

[jb747]

I can’t say how long but yes it definitely would have taken some time to come out of feather and spool up again. It is definitely not instant.

There was a gap of about 30 seconds between the time the condition levers were selected (instead of flap) and the time where the flaps were actually taken to 30. I'm sure it would have seemed like hours waiting to the props to provide power, but you'd have to expect it would only a few seconds. Any power at all would have delayed things... I guess we'll eventually find out.

This does continue to fit in with a theory that I think I wrote about a year or two ago. Protection, whether it be training, or hardware and software, has taken away the causes of many historic accidents. So, now, we're left with the outliers. Events that we look at and just wonder how it was done.

 

[Quickstatus]

outliers

the ones where the circumstances are so far outside the operational norms that any available protection becomes moot?

 

[NM]

This does continue to fit in with a theory that I think I wrote about a year or two ago. Protection, whether it be training, or hardware and software, has taken away the causes of many historic accidents. So, now, we're left with the outliers. Events that we look at and just wonder how it was done.

This is looking more and more like you previously indicated ... questioning how much recent time the (instructing) Captain (originally Pilot Monitoring) had operating in the right seat. Normally operating as a captain (in left seat) he would be using his right hand to manipulate the flaps control, but in this situation and in an unusual position he was using his left hand, so perhaps the "muscle memory" didn't kick in to identify the mistake?

 

[albatross710]

@jb747 what do you think about the final stages of the flight in which the aircraft was stalled. Would it have been better to nose down to stay in control. still a likely bad outcome but better than freefalling in to the ground.

 

[jb747]

@jb747 what do you think about the final stages of the flight in which the aircraft was stalled. Would it have been better to nose down to stay in control. still a likely bad outcome but better than freefalling in to the ground.

You're always going to be better off if you arrive at the ground under some semblance of control. Missing that ravine might have helped too.

 

[Quickstatus]

Here is a Youtube commentary about this accident by an ATR pilot