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Post by kevin5345179 on Sept 29, 2019 18:49:16 GMT 1
Whether or not there is a difference in design, no P8 (probably) or MAX (certainly) has logged a number of cycles that could trigger the issue. I don't think Boeing said the problem could not appear on these types in a distant future. Boeing said the issue will not appear on the P8 or MAX, they did not talk about them being to young. It would imply, that the pickle fork was changed. And if the pickle fork was changed, the question would be why the pickle fork with a lifetime of 90 K cycles, was changed on a grandfathered design, if there was no problem. MTOW wingload related ? obvious thing is they saw in the simulation that current design isn't sufficient to support -> they reinforce the structure |
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philidor
in service - 6 years
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Post by philidor on Sept 29, 2019 23:51:32 GMT 1
if the pickle fork was changed, the question would be why the pickle fork with a lifetime of 90 K cycles, was changed on a grandfathered design, if there was no problem. There may have been reasons that we cannot guess. Complex trade-offs are involved when developing a new variant. |
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Post by kevin5345179 on Sept 30, 2019 21:25:31 GMT 1
so that's basically 20% based on the amount of sampling
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Baroque
in service - 2 years
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Post by Baroque on Sept 30, 2019 22:40:50 GMT 1
Of course, with costs passed onto Boeing, they continue to haemorrhage on what's supposed to be their bread-and-butter aircraft.
I have to wonder, what does this all mean to those loyal customers who are "defiantly" Boeing given how quality is evidently no longer part of Boeing's culture.
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Sept 30, 2019 23:48:50 GMT 1
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Post by kevin5345179 on Oct 1, 2019 0:51:03 GMT 1
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Post by kevin5345179 on Oct 1, 2019 7:46:00 GMT 1
Boeing cannot catch a break this year ! Hopefully this is just a manufacturing defect on a small number of planes, but it's far too early to tell ... The cracking comes unexpected, if it would be connected to a certain know batch of frames, it would have been expected and especially checked for. I think they have to check quite a lot of frames, even to find out it to being only connected to a certain small batch. and if this should be wider problem on the NG, why should it not crop up on the MAX? according to Leeham, wing attachment design was different between NG and MAX leehamnews.com/2019/09/30/boeings-737-in-another-pickle/leehamnews.com/2019/09/30/boeings-737-in-another-pickle/ |
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mjoelnir
in service - 2 years
Posts: 4,089
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Post by mjoelnir on Oct 1, 2019 10:27:46 GMT 1
So the P8 should than also have a different design compared to the NG. |
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Post by kevin5345179 on Oct 8, 2019 20:42:48 GMT 1
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Post by fanairbus on Oct 9, 2019 4:51:25 GMT 1
...and the misery mounts  Surely some heads are being examined for rolling? |
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Surely some heads are being examined for rolling?