[NSRCA-discussion] 747 Snap Entry?

[Keith Hoard]

Well, I guess they did do a couple Split-S's, sucked to be those guys . . .

I tend to discount incredible aviation stories that are passed down thru the
ages. .  . (no offense to our more elderly aviators on the list). . . .


On Tue, Jul 1, 2008 at 6:43 PM, Martin X. Moleski, SJ <moleski at canisius.edu>
wrote:

> rcmaster199 at aol.com wrote:
>
>  A few of us were discussing just such an occurrence recently which
>> apparently happened by accident and darned near crashed the plane. Dean
>> remembered the details which went something like this:
>>
>
>  The pilot of the 727 about 20 years ago had the plane trimmed as far aft
>> as possible and had inputed a bit of flap to use fuel most efficiently. The
>> co-pilot, soon after returning from a visit to the loo, saw the trimmed flap
>> and flipped the switch to return the flap to neutral. This action
>> immediately made the plane too tail heavy which made the plane do a pretty
>> violent half snap to inverted. ...
>>
>
> TWA Flight 841, 04 APR 1979.  Harvey G. "Hoot" Gibson.
>
> The NTSB says one LE slat failed to retract fully, causing the
> plane to roll to the right:
>
> Final report:
> http://aviation-safety.net/database/record.php?id=19790404-0
>
> Accident report:
> http://amelia.db.erau.edu/reports/ntsb/aar/AAR81-08.pdf
>
> The Accident report notes that the pilot erased all of the
> cockpit voice recorder data (CVR) after the plane landed
> in Detroit.  Although the pilot and copilot denied actuating
> the flaps, the NTSB concluded that they could not have
> deployed by accident and suggests that the crew was trying
> to get 2 degrees extension of the trailing edge flaps.
>
> If all of the leading edge slats had retracted or if the
> pilot had responded to the second roll to the right sooner,
> there wouldn't have been a problem.
>
> "After recognizing the right roll condition, the captain rolled the
> aircraft
> to a near wings-level upright position; thereafter, through untimely use
> of the flight controls, he permitted the aircraft to roll to the right into
> an uncontrollable attitude. The captain probably was distracted
> immediately after restoring the aircraft to near level flight by his
> efforts in attempting to rectify the source of the control problem."
>
> They went from 39,000 feet to 5,000 feet in 63 seconds.
>
> Hmm.  I'm going to add these links to the Wikipedia article:
> http://en.wikipedia.org/wiki/TWA_Flight_841_(1979)<http://en.wikipedia.org/wiki/TWA_Flight_841_%281979%29>
> .
>
>                                Marty
>
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-- 

Keith Hoard
Collierville, TN
khoard at gmail.com
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