EA772LR From United States, joined Mar 2007, 1772 posts, RR: 7 Posted (1 year 9 months 2 weeks 4 days 5 hours ago) and read 10841 times:
This just in form Flight Global:
787 certification one-third complete: Boeing
By Stephen Trimble
Boeing's 787 programme has completed the first one-third of test and certification requirements for the US FAA in advance of the flight-test phase.
The airframer's chief executive, Jim McNerney, confirmed last week that about 35% of the 787's requirements to obtain airworthiness certification are complete. "Seventy per cent of the certification doesn't have to come from the flight-test programme," said McNerney, addressing Boeing's full-year financial results. "It can come from things we are doing today and we've got about half of that done. We're feeling pretty good about it."
But Boeing still has a heavy workload when the flight test phase begins in June, if it remains on the latest schedule. Boeing plans to complete about 3,100h of flight tests and 3,700h of ground tests to complete certification.
The flight-test programme must not only certificate two new engines, but also qualify the aircraft to perform extended-range, twin-engine operations. The 787 also features new advances in materials, with a mostly composite airframe, and in systems. Boeing plans to build six aircraft for the flight-test phase and to obtain certification in early 2009.
This seems like a breath of fresh air for the Boeing boys. I hope they can continue to say on track.
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Ikramerica From United States, joined May 2005, 18434 posts, RR: 60 Reply 2, posted (1 year 9 months 2 weeks 4 days 4 hours ago) and read 10642 times:
This is the part people sort of don't understand. They kept saying the entire certification program was compressed and thus there is no way Boeing could pull it off. But between ground tests and systems tests, the part of certification that involves actual flying is smaller than most realize. 4 planes can get quite a lot of hours in to certify the frame and one engine, and the other 2 can pick up the slack to certify the second engine and do route proving and airport compatibility.
Of course, Boeing still needs to get the planes into the air...
Of all the things to worry about... the Wookie has no pants.
Steeler83 From United States, joined Feb 2006, 7355 posts, RR: 20 Reply 4, posted (1 year 9 months 2 weeks 4 days 1 hour ago) and read 9977 times:
Quoting Ikramerica (Reply 2): They kept saying the entire certification program was compressed and thus there is no way Boeing could pull it off.
What ever...
Quoting Ikramerica (Reply 2): But between ground tests and systems tests, the part of certification that involves actual flying is smaller than most realize. 4 planes can get quite a lot of hours in to certify the frame and one engine, and the other 2 can pick up the slack to certify the second engine and do route proving and airport compatibility.
How many planes did they use for certification of the triple-7? I don't get what qualms people have with the 787...
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Rheinbote From Germany, joined May 2006, 1554 posts, RR: 47 Reply 5, posted (1 year 9 months 2 weeks 4 days ago) and read 9792 times:
"Seventy per cent of the certification doesn't have to come from the flight-test programme," said McNerney, addressing Boeing's full-year financial results. "It can come from things we are doing today and we've got about half of that done. We're feeling pretty good about it."
That's lots of meaningless words. There may be hundreds of requirements that need no flight testing at all and take an hour each to check. But there are a handful that take months of proof-testing and analysis and may fail in numerous ways. "We're feeling pretty good"...sheesh
Sphealey From United States, joined May 2005, 296 posts, RR: 0 Reply 6, posted (1 year 9 months 2 weeks 4 days ago) and read 9722 times:
Quoting Rheinbote (Reply 5): That's lots of meaningless words. There may be hundreds of requirements that need no flight testing at all and take an hour each to check. But there are a handful that take months of proof-testing and analysis and may fail in numerous ways. "We're feeling pretty good"...sheesh
Are you implying that "70%" is not an earned value measure but a numerical checkoff? I would tend to think that it is an earned value measure.
Ikramerica From United States, joined May 2005, 18434 posts, RR: 60 Reply 9, posted (1 year 9 months 2 weeks 3 days 20 hours ago) and read 8153 times:
Quoting Rheinbote (Reply 5): But there are a handful that take months of proof-testing and analysis and may fail in numerous ways.
Yes, and many of those are still done on the ground. Some are even continued even after certification is granted. The A380 is still undergoing tests...
This is not the say that you could fly 20 planes and finish flight testing in 1 month. But scheduled correctly, you can do it in 6 months.
Quoting Steeler83 (Reply 4): How many planes did they use for certification of the triple-7?
I'm sure someone knows more info, but it wasn't as high as 6. And that was with 3 engine families to certify, not 2.
Of all the things to worry about... the Wookie has no pants.
Kanban From United States, joined Jan 2008, 49 posts, RR: 0 Reply 10, posted (1 year 9 months 2 weeks 3 days 18 hours ago) and read 6536 times:
Consider that there is both a production certificate and a airworthiness certificate... I would not be surprised that they are 50% or better on the production certificate... The production certificate is mostly processes and procedures, manufacturing plans, engineering drawings, Quality Assurance processes, test standards etc. and the ability to produce the same results over and over and over with any mechanic/vendor etc.
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