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Qantas 744 Depressurisation

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Qantas 744 Depressurisation

Old 25th Jul 2008, 11:47
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Frame broken

The frame being taken out shows that some force was applied to it, corrosion no chance underpants, lets talk force to do this type damage and its not a decompression.

OXY or a bomb thats for sure. iside the AKE can i would say

The B744 is the brick s*ithouse of the sky....
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Old 25th Jul 2008, 11:47
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CNN have amateur video taken by a pax with the seat back screen showing the a/c at 10,000ft. The masks are down and the pax seem calm and the cabin crew doing a trolley service. There is the inevitable round of applause after touchdown.
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Old 25th Jul 2008, 11:52
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The stuff hanging out of the aircraft is not pax baggage from bins and looks more like cargo off a pallet, you can see the rope style tie downs off the pallet in the picture showed, it could be mail, cargo or pax bags on a metal pallet possibly, if there were ULD's in there I think you would see them showing possibly?
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Old 25th Jul 2008, 12:02
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The stuff hanging out of the aircraft is not pax baggage from bins and looks more like cargo off a pallet, you can see the rope style tie downs off the pallet in the picture showed, it could be mail, cargo or pax bags on a metal pallet possibly, if there were ULD's in there I think you would see them showing possibly?
I though that originally, but the straps you can see on the black bag are just on that bag, there are no pallet straps so I think you can discount that theory. Plus the straps on pallets are stress tested to enormous loads, there is no way they would allow the baggage to move like that, and it would be shrink-wrapped if it were pax bags on a PMC.

There is the possibility that the bags are from an AKC that didn't have a bin in front of it, and the curtain wasn't shut or failed. I'd love to see the load sheet for this aircraft

I can't see this investigation being too difficult, plenty of evidence, and thankfully an intact (mostly) aircraft.
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Old 25th Jul 2008, 12:12
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Damage?

How long would this aircraft be held out of service???
How long would it take to repair this???
What costs would be incurred ???
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Old 25th Jul 2008, 12:17
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Originally Posted by wrobinsyd
The frame being taken out shows that some force was applied to it, corrosion no chance underpants, lets talk force to do this type damage and its not a decompression.
Yes, lets talk about force to do this kind of damage. Try this for size from UAL 811:

The Real Unfriendly Skies, Saga of Corruption, Rodney Stich, picture

Plenty of frame taken out there, but no "other" forces - just a failed door, and decompression.
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Old 25th Jul 2008, 12:19
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VH-OJK

Serial number 25067 LN57
Type 747-438
First flight date 21/05/1991
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Old 25th Jul 2008, 12:21
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My money would be on the fibre-glass honeycomb fairing failing first. As has been described by Mechanical Man (747 engineer), the fairing is screwed on. In the close-up photo, you can see the fairing at the front has failed (cracked or been pulled away from the screws) along the screw line. At the rear edge the screw holes are still there. However there is a bracket/strap still attached to the hull - lower centre. Is this used to attach the fairing in any way? (Perhaps mechanical man might confirm?) Is there a corresponding bracket on the upper half (where no metal exists now)? There is a scenario that the fairing came off due to wind pressure, and due to damage or failure of the leading edge screws. Once on the move, with the bottom bracket/strap already failed, the only retainer left would be this upper bracket ??? (if it exists) that, if it is like the lower one, seemingly is attached direct to the fuselage. (Maybe the fairing flailed around for some seconds) Coupled to a degree of corrosion at the same point, the force could be enough to initiate/propogate a crack, cause pressure failure and the rupture of the alu as seen.
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Old 25th Jul 2008, 12:23
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Worrisome!

Anyone have any info on just how much of the cabin floor collapsed? As I recall, the infamous Turkish DC10/cargo door crash occurred due to the explosive decompression collapsing part of the aft floor, through which controls to the tail section were routed. I think (please correct me if I'm wrong!) that due to the high placement of the 747 cockpit, the flight controls are routed along the upper fuselage and not the floor in the area of this plane's damage.
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Old 25th Jul 2008, 12:25
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true a 12 ft x 8 ft flap of a fwd cargo door applies no force at all, get real???


look at the skin its all blown out frame broken and torn the the decompression would not do this, have you never seen myth busters?

diff press wont do this
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Old 25th Jul 2008, 12:26
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I'm with you IF789. There's no sign of charring on the exposed luggage which says to me there probably wasn't an initiating explosion. More likely a bit of the skin failed first and the decompression did the rest of the damage.
(NB statement made with no professional expertise, just eyes and a brain)
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Old 25th Jul 2008, 12:26
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PHOAAARRR! That photo from Afterposten is good. You can see how the honeycomb ripped away from its attachments on the body and the wing, especially above the rivet line (on the wing). The fairing detached almost cleanly below that same rivet line. That does leave some puzzling questions.

My kudos to the f/crew for getting QF30 down safely, and to the passengers for keeping calm in what clearly was a serious situation.

S.
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Old 25th Jul 2008, 12:28
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For f sake boeing..sort it out!
This has happened too many times over the years!

If this was a 'eastern' a/c the entire fleet would be grounded. I expect the FAA wil find a way to stop the Boeing/US economy taking a hit on this one!

AAAARRRHHH!!
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Old 25th Jul 2008, 12:29
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I'm curious about the discoloration and apparent distortion of the inner skin around the forward edge of the (departed) fairing. Any suggestions?

Last edited by SVR; 25th Jul 2008 at 12:33. Reason: error
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Old 25th Jul 2008, 12:32
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The longitudinal laopjoint (the one that cause the Aloha incident on a 737) is running right acros the center of the hole. Worth thinking about when looking for the initial failure...

However, congratulations to the crew for a well done emergency procedure.
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Old 25th Jul 2008, 12:35
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Jewitts,
Surely the failure of the wing/body fairing could not precipitate that apparent damage? I'm only a humble B2 engineer so willing to be corrected.
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Old 25th Jul 2008, 12:36
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The discolouration should be normal.

S.
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Old 25th Jul 2008, 12:38
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small explosion

Could have been an (illegally carried) camping gas cartridge or some sort, that went up in the bag (from underpressure or heat). Looks a bit like an explosion, though not strong enough to have come from a real bomb. Pictures from Lockerbie come back...
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Old 25th Jul 2008, 12:38
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More passenger accounts at the BBC

BBC NEWS | World | Asia-Pacific | Eyewitness: Qantas flight drama
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Old 25th Jul 2008, 12:39
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Isn't there a Fire bottle behind the sidewall here?

If so - can't see it or it's mounts?

also - can see a vertical support frame for the sidewall curtain on the fwd stub fuselage frame intact! (directional explosion???? maybe)

Can see screw heads still on fuselage skin where leading edge of fairing attaches, (brown strip on fuse)

Discolouration is corrosion preventative solution.
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