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Delta Airlines Hits UFO ..ok here we go

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Delta Airlines Hits UFO ..ok here we go

Old 28th Oct 2017, 15:32
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Delta Airlines Hits UFO ..ok here we go

Seems A Delta 752 while on descent to Chicago struck something interesting.

Nose cone / radome...all safe

On today's early news feed from RT...

My apologies couldn't load the pic, 28 Oct.
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Old 28th Oct 2017, 15:52
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Originally Posted by G-CPTN View Post

Seems a basketball team was on board... Took a punch on the nose
'What possibly could we have hit?': Rough flight for Steven Adams - NZ Herald
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Old 28th Oct 2017, 18:25
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Well, did they count the birds and one is missing?

Certainly does not look like a bird strike, even less a drone strike. Despite the opinion of "Aviation commentator Peter Clark" (in the nzherald story), based on that picture I am willing to bet that this dome collapsed spontaneously.
No traces, no apparent impact point, paint missing only on the places where it is bent, no hail traces, almost exactly symmetric collapse... This happened all by itself, no reason to suspect the feathered colleagues.

Maybe they chose the budget "made from re-used plastic bottles" spare part provider for the plastic caps on their 757s
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Old 28th Oct 2017, 19:00
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Yeah, where are the blood and guts?
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Old 28th Oct 2017, 20:10
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If the aircraft entered cloud or rain the remains of a bird is washed away.

Domes do not collapse " spontaneously" , ever!

Seagulls is my preferred pray, record is 10 in one go. Just after V1.

Moto; Better 10 on the wings then one in the engine!

Remarkably little left to clean up when checking for damage.

My money is on a small bird, five cents worth.
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Old 28th Oct 2017, 20:19
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Just typical " expert journalist", article stated somewhere thru FL300 was the strike. High flyers, if that's the case
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Old 28th Oct 2017, 20:47
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Originally Posted by BluSdUp View Post
If the aircraft entered cloud or rain the remains of a bird is washed away.

Domes do not collapse " spontaneously" , ever!

Seagulls is my preferred pray, record is 10 in one go. Just after V1.

Moto; Better 10 on the wings then one in the engine!

Remarkably little left to clean up when checking for damage.

My money is on a small bird, five cents worth.
You should google “Boeing 757 nose cone collapse”. You may want to retract the “ever” comment.
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Old 28th Oct 2017, 21:53
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One of many examples is this old PPRuNe thread:

http://www.pprune.org/rumours-news/334094-jet-nose-cone-caves-mid-flight.html


Sounds like an old problem of structural collapse of B757 radomes.
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Old 29th Oct 2017, 04:31
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had one on a 767, not struck by anything, defect caused delamination and subsequent collapse..
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Old 29th Oct 2017, 04:51
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If it was bird, if was IFR on GPS as it struck exactly on the middle ! Aerodynamics + initial examination of the damage would indeed suggest a radome collapse,rather than hitting something.
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Old 29th Oct 2017, 08:34
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Shape of collapse practically identical to the cited earlier NW event. Investigation will reveal whether it was simple material failure, or perhaps the delayed effect of an earlier damage (a small bird may not leave any readily recognisable traces, especially in summer when radome also full of insect impacts, during the visual will appear ok, possibly for weeks or months until this happens).
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Old 30th Oct 2017, 08:58
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Possibly detrimental to airspeed indications (both sides affected).
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Old 30th Oct 2017, 10:40
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Originally Posted by alldaysushi View Post
Just typical " expert journalist", article stated somewhere thru FL300 was the strike. High flyers, if that's the case
Highest verified bird-strike was FL370 with a vulture over Africa (Ivory Coast I think). There have been unverified reports of birdstrikes even higher than that.
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Old 30th Oct 2017, 14:34
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Originally Posted by BluSdUp View Post
If the aircraft entered cloud or rain the remains of a bird is washed away.

Domes do not collapse " spontaneously" , ever!

Seagulls is my preferred pray, record is 10 in one go. Just after V1.

Moto; Better 10 on the wings then one in the engine!

Remarkably little left to clean up when checking for damage.

My money is on a small bird, five cents worth.

If evidence is washed away after a plane enters a cloud or rain why do big remains stay on airplanes for days, weeks, months, or years? Why does bird strike evidence stay on airplanes stay on for days? I doubt many airliners go days and days without flying through a cloud or rain.
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Old 30th Oct 2017, 16:06
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Depends on how you define "remains"

Basically the big pieces wash or are blown off

What remain days later in some cases are goop streaks of dry blood and tissue in dead air zones. ultra-violet light reflects back as yellow-green. After a scrape and a filtration wash of what looks like a finger-nail scraping a puff of down feather may pop out and presto the bird species and maturity is confirmed. Works for other foreign material like, dirt or blue-ice as well.
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Old 30th Oct 2017, 19:37
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Or may be they hit a weather balloon.
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Old 30th Oct 2017, 21:20
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My vote is with the 'expert' opinions of the passengers...

"Must've been a pretty big bird — a Pterodactyl maybe," Thunder forward Nick Collison said.


NBA team Oklahoma City Thunder stunned after plane damaged by bird strike - ABC News (Australian Broadcasting Corporation)

Perhaps someone in SEA is still mad about them leaving...
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Old 30th Oct 2017, 21:58
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Is there any correlation between the aircraft descent and the collapse on these incidents?

I'm getting a gut feeling that there was a peaking of negative pressure in the nosecone relative to ambient.
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Old 31st Oct 2017, 16:26
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Looking at the image, along with the location of the pitot tubes, what kind of airspeed accuracy would you get?
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Old 31st Oct 2017, 16:29
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Very good point. I suspect one would see a differential since the cave-in is to one side.
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