PIC : ANA B787 landing gear problem

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ggmeese
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PIC : ANA B787 landing gear problem

Post by ggmeese »

The crew had to lower the undercarriage manually after the fly by :
http://flyteam.jp/photo/ANA/Boeing-787-881/131323/L

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sn26567
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Re: PIC : ANA B787 landing gear problem

Post by sn26567 »

ggmeese wrote:The crew had to lower the undercarriage manually after the fly by
And luckily it worked, unlike the LOT 767 at WAW!
André
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sn26567
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Re: PIC : ANA B787 landing gear problem

Post by sn26567 »

First incident, already, with the 787 as reported in The Aviation Herald:

Incident: ANA B788 at Okayama on Nov 6th 2011, unsafe gear

An ANA All Nippon Airways Boeing 787-800, registration JA801A performing flight NH-651 from Tokyo Haneda to Okayama (Japan) with 249 people on board, was on approach to Okayama when the crew did not received a gear down indication for all gear struts due to a hydraulic problem and aborted the approach, a visual inspection confirmed only the nose gear had been extended. Following working the checklists all gear was down and locked and the aircraft concluded the flight with a safe landing.
André
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sn26567
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Re: PIC : ANA B787 landing gear problem

Post by sn26567 »

First incident, already, with the 787 as reported in The Aviation Herald:
Incident: ANA B788 at Okayama on Nov 6th 2011, unsafe gear

An ANA All Nippon Airways Boeing 787-800, registration JA801A performing flight NH-651 from Tokyo Haneda to Okayama (Japan) with 249 people on board, was on approach to Okayama when the crew did not received a gear down indication for all gear struts due to a hydraulic problem and aborted the approach, a visual inspection confirmed only the nose gear had been extended. Following working the checklists all gear was down and locked and the aircraft concluded the flight with a safe landing.
Boeing and All Nippon Airways investigate landing gear problem on the 787 Dreamliner.
André
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Stij
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Re: PIC : ANA B787 landing gear problem

Post by Stij »

Imagine the gear wouldn't have come down... it would have been a real PR disaster, not dash 8 q 400 style,, but Comet-style (the plane, not the member! ;-) )

Bralo20
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Re: PIC : ANA B787 landing gear problem

Post by Bralo20 »

Stij wrote:Imagine the gear wouldn't have come down... it would have been a real PR disaster, not dash 8 q 400 style,, but Comet-style (the plane, not the member! ;-) )
On the other hand it would have been "nice" to see a gear-up landing of the 788 to see how the plane will hold itself. AFAIK the FAA & co politely requested an actual gear-up landing during certification because of the lower ignition point of the used composite materials. Something that was obviously declined by Boeing which stated that computer simulations proved that it was no issue. Since there were no legal ground to order an actual gear-up landing they approved it with the simulations.

I still wonder how the plane will hold itself during such a "landing"...

But yes, it would have been a PR disaster... Even when the outcome would have been good...

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earthman
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Re: PIC : ANA B787 landing gear problem

Post by earthman »

I imagine it would work quite well. The composite B-1B also did some gear up landings. The composite material would probably completely disintegrate, taking a lot of energy out of the landing. I do imagine the damage to the plane would be considerable. I recall some crash tests of formula 1 carbon composites, the material disintegrated on impact, absorbing more energy than any crumple zone would.

tsv
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Re: PIC : ANA B787 landing gear problem

Post by tsv »

Gear deployment probs are reasonably common but the fact that is has happened on one of the first 787's produced and so soon after EIS at that doesn't do much to inspire confidence in the aircraft.

Think I'll avoid flying on a 787 for a few years. Admittedly this won't be too hard unless delivery rates dramatically increase. ;)

regi
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Re: PIC : ANA B787 landing gear problem

Post by regi »

tsv wrote:Gear deployment probs are reasonably common but the fact that is has happened on one of the first 787's produced and so soon after EIS at that doesn't do much to inspire confidence in the aircraft.

Think I'll avoid flying on a 787 for a few years. Admittedly this won't be too hard unless delivery rates dramatically increase. ;)
Maybe a prototype - pre serial production type of equipment failure ?
Guess 1: a valve that was blocked because of metallic particle contamination ( the valve block could have been not well cleaned after machining)
Guess 2: a valve that had a seal problem.
Guess 3: a sensor which was malfunctioning. Quite possible because those sensors are not off the shelve and serial production for small components is completely different than for prototypes.
Guess 4: hydraulic fluid problem because of low temperature or contamination.
Guess 5: computer problem. Which is the worst possible cause IMHO.

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