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submitted 8 months ago by Stopthatgirl7@lemmy.world to c/news@lemmy.world

Boeing is having a rough time of it right now, with parts falling off its planes left, right and center. Just last week, a wheel came loose and smashed through a car, and earlier this year the door from a 737 Max aircraft broke off mid-flight. That mid-air disaster sparked an audit from the Federal Aviation Administration, which has gone far from well.

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[-] skilltheamps@feddit.de 26 points 8 months ago* (last edited 8 months ago)

How does this part (which is what the headline refers to and presumably the most outrageous inspection finding)

At one point during the examination, the air-safety agency observed mechanics at Spirit using a hotel key card to check a door seal [...]. In another instance, the F.A.A. saw Spirit mechanics apply liquid Dawn soap to a door seal “as lubricant in the fit-up process,” according to the document. The door seal was then cleaned with a wet cheesecloth

have anything to do with the opening of the article

Just last week, a wheel came loose and smashed through a car, and earlier this year the door from a 737 Max aircraft broke off mid-flight

???

The article misses the whole point, which is that the audit did not uncover the sources of these incidents.

[-] solrize@lemmy.world 17 points 8 months ago

The part about the crappy QA process explains why the delivered planes keep having problems.

[-] skilltheamps@feddit.de 9 points 8 months ago

Not to me. Absence of QA allows faulty parts to make it into a plane, it does not explain why there are faults in the first place. For doors and wheels popping off there have to be either lethal part design mistakes, parts made from play doh instead of aluminium/steel, or the people on the assembly line throwing fasteners in the bin instead of putting them on. It's not like a door pops of because its seal touched soap once and somebody poked an unverified piece of plastic at it. Especially in aviation, where you need to have redundancies.

[-] themeatbridge@lemmy.world 3 points 8 months ago

I think it's an issue of tolerance. They should be using gauges to test the fit, because hotel keycards can vary in thickness. Gauges are stupid cheap compared to the cost of the plane. It's evidence of cost-cutting bullshit.

Same with using dish soap as a lubricant. It's the wrong material for the job. Soap leaves a residue, and dissolves other lubricants. If there's supposed to be lubricant in the door, the soap is a bad choice. If there isn't supposed to be a lubricant in the door, then soap is a bad choice. It's like Schrodinger's lubricant. You won't know if it's a problem until it's a problem.

No manufacturing process or material design is perfect. You get as close as possible, and then QA catches the mistakes.

For Boeing, it sounds like they didn't try very hard to perfect their processes, and then didn't bother with QA.

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this post was submitted on 13 Mar 2024
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