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re: NTSB releases preliminary report from Lafayette plane crash on 12/28

Posted on 1/7/20 at 7:08 pm to
Posted by Mohican
Member since Nov 2012
7118 posts
Posted on 1/7/20 at 7:08 pm to
How reliable are ground witnesses stating that both engines were at max rpm? Not very I would presume. Being in the soup at low altitude with an engine failure would be about as bad as it gets.

The one thing we do know is that someone was trying to save themselves by leveling the wings.

Fingerprints of spacial disoreintation are all over NTSB reports with conditions like those at time of the crash. You can assume that most likely played a role.


Posted by slackster
Houston
Member since Mar 2009
91838 posts
Posted on 1/7/20 at 7:10 pm to
Perhaps one of our resident pilots can help - wouldn't a 35-70 degree roll be noticeable in the cockpit, regardless of cloud cover?

ETA - wouldn't you be able to feel it?
This post was edited on 1/7/20 at 7:11 pm
Posted by Mohican
Member since Nov 2012
7118 posts
Posted on 1/7/20 at 7:17 pm to
quote:

Perhaps one of our resident pilots can help - wouldn't a 35-70 degree roll be noticeable in the cockpit, regardless of cloud cover?


It would be noticeable in the form of G’s, not necessarily which ways up. A 70 degree roll would feel very much like pulling the yoke straight back to do a steep vertical climb if you have no horizon. It’s hard to know what’s going on when there’s no reference. You just know you’re feeling heavy G’s.


Posted by EA6B
TX
Member since Dec 2012
14754 posts
Posted on 1/7/20 at 7:25 pm to
A plane can be in a 70 degree bank and turning, and fell like it is flying straight and level. Without some type of visual reference of the horizon, or using the attitude indicator in the instrument panel it is impossible to tell what attitude the plane is in just by “feeling”. Not using or trusting your instruments when there is no outside visual references and relying on what your brain tells u is straight and level is exactly what causes spacial disorientation and the resulting loss of control:crash.
Posted by hubertcumberdale
Member since Nov 2009
7323 posts
Posted on 1/7/20 at 8:17 pm to
quote:

A plane can be in a 70 degree bank and turning, and fell like it is flying straight and level. Without some type of visual reference of the horizon, or using the attitude indicator in the instrument panel it is impossible to tell what attitude the plane is in just by “feeling”. Not using or trusting your instruments when there is no outside visual references and relying on what your brain tells u is straight and level is exactly what causes spacial disorientation and the resulting loss of control:crash.


I have no clue about planes but one would think they would have some kind of instrumentation on board to tell them this information in the event you dont have visual references?
Posted by TigerstuckinMS
Member since Nov 2005
33687 posts
Posted on 1/7/20 at 8:25 pm to
quote:

I have no clue about planes but one would think they would have some kind of instrumentation on board to tell them this information in the event you dont have visual references?

They do. It's called an artificial horizon or an attitude indicator and shows the plane's orientation relative to the sky and the earth. The primitive parts of a pilot's brain can take over, though, and cause the pilot to disregard what the indicator is telling them over what their inner ear and proprioreceptors are telling them.

Once outside references go away, pilots and the people flying with them die all the time because the pilot trusts what their body (which is evolved to sense position and body attitude on stable ground, not moving through the air and subject to dynamic loads) is telling them and completely disregards what the instrument is telling them. In essence, they get convinced the instrument is faulty and then splat because they trust their untrustworthy senses. By the time they regain an external reference and realize their body is lying to them, it's often too late to recover.
This post was edited on 1/7/20 at 8:31 pm
Posted by sicboy
Because Awesome
Member since Nov 2010
79568 posts
Posted on 1/7/20 at 8:28 pm to
quote:

I was thinking the pilot got spatial disorientation from the low cloud bank that they flew in


I have a friend who just got his license and he was telling me about some training he did where the instructor told him to close his eyes and try to fly the plane by feel with the instructor telling him when to open his eyes or he would take over when he had to. Said it's so easy to end up sideways and/or in a dive if you're not going by instrumentation.

Said it takes a while before they allow you to get qualified for flying through cloud cover.
This post was edited on 1/7/20 at 8:30 pm
Posted by tigerpimpbot
Chairman of the Pool Board
Member since Nov 2011
69083 posts
Posted on 1/7/20 at 8:29 pm to
Horrific
Posted by LSUGrrrl
Frisco, TX
Member since Jul 2007
46368 posts
Posted on 1/7/20 at 8:29 pm to
I know this is true but thought it was once your inner ear recalibrated. Wouldn’t you feel such a bank when you’re just taking off?
Posted by Lithium
Member since Dec 2004
64237 posts
Posted on 1/7/20 at 8:48 pm to
quote:

I still don't understand why the pilot didn't respond to the air traffic controllers when alerted about low altitude?


aviate, navigate, communicate in that order
Posted by Lithium
Member since Dec 2004
64237 posts
Posted on 1/7/20 at 8:51 pm to
quote:

It's called an artificial horizon or an attitude indicator and shows the plane's orientation relative to the sky and the earth. The primitive parts of a pilot's brain can take over, though, and cause the pilot to disregard what the indicator is telling them over what their inner ear and proprioreceptors are telling them


Always trust your instruments. They are more likely right then you are. I've felt like I was turning in the clouds and the instruments tell me i'm not. I always believe the instruments and I'm still here
Posted by 777Tiger
Member since Mar 2011
92246 posts
Posted on 1/7/20 at 9:01 pm to
didn’t wade through everything on here yet but sounds the classic engine failure at a critical phase of flight and pic was overwhelmed and did not respond, all of this nonsense about, bank, inner ear, blah, blah, is nonsense, also doubt incapacity, this is just based of of OP
Posted by Lithium
Member since Dec 2004
64237 posts
Posted on 1/7/20 at 9:03 pm to
someone said both engines were running at impact
Posted by 777Tiger
Member since Mar 2011
92246 posts
Posted on 1/7/20 at 9:06 pm to
eye witness credibility has been proven to be almost worthless, doubt a lay eyewitness would know the difference of one v. two, much less piston, turbo prop, jet,
Posted by roguetiger15
Member since Jan 2013
17562 posts
Posted on 1/7/20 at 9:11 pm to
Buddy of mine oversees many of the hangers at Lafayette including the plane that went down. We also have a bunch of private pilot friends in our friend group -I’d met Ian a few times. According to my friend the left engine had been running a little hot for a few months. The pilots who flew the plane would throttle back when possible to sync up with the right engine temp when appropriate. That morning was extremely foggy and Ian was flying solo with the kid in the right seat. Upon takeoff he was told to take a 33something heading from L22 which would have been a left bank. Seems like the left engine failed during the left turn maneuver. His speed was probably not anywhere fast enough for the rudder to be of help. The extreme fog hitting the dead prop made matters worse. Ian most likely fought the plane to 200 feet which was the estimated fog height from ground level. It’s no coincidence, in my mind,that the plane found the only open field in the area. RIP Ian.

Just want to clarify- my buddy is not the mechanic. He oversees keeping the hangers clean/cleaning the planes/fueling the planes and making them ready for departure or stowing the planes back in the hangers
This post was edited on 1/7/20 at 9:13 pm
Posted by jcaz
Laffy
Member since Aug 2014
19292 posts
Posted on 1/7/20 at 9:13 pm to
quote:

I have a friend who just got his license and he was telling me about some training he did where the instructor told him to close his eyes and try to fly the plane by feel with the instructor telling him when to open his eyes or he would take over when he had to.


Unusual Attitude Recovery
Almost had me sick but we practice wings level and if it’s brown power out and pull up. If it’s blue power in and push down. Spatial disorientation is a serious issue and can get even the best pilots messed up.
Posted by northLAgoomba
Grand Cane, LA
Member since Nov 2009
3979 posts
Posted on 1/7/20 at 9:17 pm to
Whose the fricker that's down-voting every post?
Posted by 777Tiger
Member since Mar 2011
92246 posts
Posted on 1/7/20 at 9:33 pm to
Left 330 heading would have been an aggie vector although I will stipulate to noise abatement procedures, doubt it though , “thick fog” affecting performance, no
Posted by roguetiger15
Member since Jan 2013
17562 posts
Posted on 1/7/20 at 9:37 pm to
I didn’t say thick fog affected performance. I said thick fog hitting a dead prop did not help the situation
Posted by 777Tiger
Member since Mar 2011
92246 posts
Posted on 1/7/20 at 9:39 pm to
not a factor
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