PC12 down in Nevada

[Concours77]

Both spars spliced at same rib? Sounds....wrong

[Seat4A]

Juan's notes with his most recent video post

"Mar 4, 2023
This Audio collected from a security camera (Dave from Stagecoach NV.) within 1/4 mile of the crash site provides a mountain of data to NTSB Accident Investigators. There was no video of the crash- too dark and snowy. Let's break it down..."

You Tube

[fdr]

Originally Posted by Seat4A

Juan's notes with his most recent video post

the 3:49-3:59 part is interesting, but the analysis is going to be complex, the aspect of the aircraft, air speed, and engine RPM are variables that will make analysis more complex than an onboard CVR recording. A sonogram of the last 10 seconds should show periodic aspect changes.

[421dog]

Originally Posted by fitliker

Any tips on maintaining minimum ice speed in the climb for this particular model ?
Any thoughts on Va, Vb for this particular model ?
Some aircraft have very large differences between cruise and Va , Vb this particular model may fall into that group . If the tracking speeds are accurate he was already forty knots over Va in an area of reported light to moderate chop turbulence and an area forecast to have moderate to severe turbulence warning .

I’ve only got a few hrs in 12/45, but it I’m pretty sure it doesn’t have a Va per se, and, by definition, as it isn’t a transport category aircraft, it doesn’t have a Vb, Vc etc.
what I do recall is a Vo (max operating maneuvering speed) of 166 (I think, looking at my notes from ground school).

[lossiemouth]

Appears the company has quite a recent history.

https://eu.rgj.com/story/news/2023/0...n/69947131007/

[FUMR]

Originally Posted by lossiemouth

Appears the company has quite a recent history.

https://eu.rgj.com/story/news/2023/0...n/69947131007/

Are they all their own aircraft though? I'm not sure but I think that they have several operators flying on their behalf.

[rigpiggy]

Originally Posted by okipoki

An ex Life Guard pilot in the same area as this accident happened. Among many flying jobs I have done, I believe air ambulance job is the most rewarding as well as demanding. Except some air ambulance operators in Canada which use Metro or B1900, almost all turboprop aircrafts in this industry are flown by single pilot. In some cargo operations, B1900 was approved for single pilot ops as well in the US as far as I know. So, it can be done. I am afraid the industry won't change their practice of single pilot in PC-12 after this accident.

Sad day, indeed.

Nope every medevac in country(Canada) I know uses 2 crew ops. Some opsin flat country use.pc12s but most everyone else uses KA200/250/350s

In other news
C-FKAB, a Pilatus PC-12/45 aircraft operated by Air Bravo Corp., was conducting flight PCO1414
from Kenora (CYQK), ON, to Thunder Bay (CYQT), ON, with 2 crew onboard. During final
approach into CYQT at approximately 9 nautical miles from Runway 12, the flight crew powered
back the engine and the aircraft's engine started vibrating. The flight crew pitched the nose up to
gain altitude and observed abnormally high engine internal turbine temperature (ITT) and high NG
(gas generator) on the engine gauges with no corresponding increase in engine power. The crew
acknowledged the abnormality, declared an emergency and manually shutdown the engine. The
crew continued the glide and landed the aircraft safely on Runway 12. The pilot taxied off the
runway with remaining momentum. There were no reported injuries and no further damage to the
aircraft. The aircraft was towed to the hangar for further inspection.
The operator's maintenance inspection indicated that blades separated from the PT2 disc at the
root. The engine is being sent to Pratt & Whitney Canada for further inspection.

This is why I don't fly seifr

[fdr]

Originally Posted by Concours77

Both spars spliced at same rib? Sounds....wrong

It is a common design on others, and has been seen on in flight failures. There is an interesting video of a King Air 350 with symmetrical failure of both wings at outboard attachment points. While it neatly fit into the swimming pool at impact, it didn't end well. Whether the wing has a single, 2, 3 or 5 joins in the spar is dependent on the designers balance of requirements at the start.