We pick this accident apart every mountain course. http://www.youtube.com/watch?v=NHinFTxLVss
Ideas??? Obviously LTE
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About Me
- helimountainpilot
- I have been flying in Colorado's mountains since 1996 and have over 5000 hours of flight time there. I have ratings in helicopters, airplane single engine and multiengine as well as my CFI rating. I enjoy sharing the love of helicopter flight with my scenic tour customers.
FROM nais26 (User comment on the video)
ReplyDeleteReply LTE is Loss of tail rotor effectiveness, it is a condition where the tail rotor thrust can't oppose the yaw produced from the main rotor due to a few possible reasons.. One of the most common is a vortex ring state situation, where the airframe yaw stability is lost due to the horizontal stabilizer becoming erroneous when the aircraft slows for landing, loss of translational lift demands more power on landing and the mix of slow airspeed and increased power presented in a turbulent environment.
Another user comment is quite the explanation in my opinion as to what happened...."All you have to do is listen to the audio, all the information is there".
I think those are great words of advice to any helicopter pilot. We have to listen to the aircraft and she will tell us what's wrong with her!
As far as any other added factors in this accident, I'm think wind shift coming off the top of the ridgeline. Downdarft or wind shear?
Also note the increase in ground speed, burbles and wind shear sounds as it crosses the ridge. Landing with a tail wind is always a bad idea. Landing with a tail wind while crossing a ridgeline...
ReplyDeleteShould have executed a go around. I was looking for indications of the wind on the ground and the clouds as they came over the ridgeline as well but nothing of value.
ReplyDeleteAhhh, the wind circle (kind of like executing a high/low level lz recon first) would have come in quite handy...before landing,
ReplyDelete