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Boeing Engineers Lost Control of the Company

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201–210 of 234 posts

Re: Boeing Engineers Lost Control of the Company

#201

Earlier quoted context omitted.

Stab trim cutout has been the response item for a long time. Before the stab trim was turned on again the plane was climbing. "unstoppable MCAS" * Leave stab trim cut * Hold electric trim up * Control airspeed * etc... AoA senor is not a single point of failure. The 737 is not a fully automatic / flight protected plane. ie, the plane will continue flying with very little sensor input at all - you can even dispatch wi…

Thank goodness it's so safe! I am glad we are only talking about theoretical crazy combinations of events that can lead to a crash... You brought up faulty replacement parts yourself as a contributing cause, but when challenged you switch to methods to stop the unstoppable, undocumented MCAS. To which faulty part were you referring? The unimportant, non-SPOF AOA sensor?

The cosmic ray bit-flip of the 5 independent critical bits is very unlikely. We are being told right here on HN and in the news that this means the plane can't fly.

In the US there were close calls, but fewer. If you beleive in the chain of safety better maintenance and pilot response may have saved the day a few times when faced with the MCAS problems. The safety reports from US pilots certainly sound scary (nose down on takeoff GPWS alerts etc).

I brought up maintenance as a contributing cause in the 737MAX crashes. I didn't realize I had been challenged on this. I would really encourage you to read some of the source reporting.

The FAA had a safety notice on this precise topic

"FAA has determined it is necessary to advise operators of the importance of performing proper operations and maintenance on AOA sensors”

This is the detail on the previous lionair flight before the crash flight - from wikipedia to save time:

"it had problems maintaining a constant altitude, with passengers stating that it was like "a roller-coaster ride".[109] The chief executive officer of Lion Air, Edward Sirait, said the aircraft had a "technical issue" on Sunday night, but this had been addressed in accordance with maintenance manuals issued by the manufacturer. Engineers had declared that the aircraft was ready for takeoff on the morning of the accident.[110][111] A later report claimed that a third pilot was on the flight to Jakarta and told the crew to cut power to the stabilizer trim motors which fixed the problem. This method is a standard memory item in the 737 checklist.[112] Subsequently, the National Transportation Safety Committee confirmed the presence of an off-duty Boeing 737 MAX 8 qualified pilot in the cockpit but did not confirm the role of the pilot in fixing the problem.[113]

Even worse is the history before that flight - REPEATED problems with the senor.

We are also now hearing that evidence submitted by lion air supposedly showing the proper fix for the sensor may have been faked.

https://www.seattletimes.com/business/questions-raised-about...

In terms of faulty replacement parts - my point was issues occur overseas that do not seem to happen within the US MROs. I'll do a quick recent example:

https://www.pressreader.com/south-africa/sunday-times-1107/2...

This follows the ex-president of south africa appointing a school teacher to head SAA (who also ran his private foundation and rumors around their relationship existed).

I'm not sure why you claim AoA is unimportant. In the chain of safety you want every advantage you can get, the more accurate data the better. So you want the AoA working. This reduces risks from MCAS. You are correct - AoA is not a single point of failure system (system is not working / plane falls from sky). There was a poster here claiming that it was.

Re: Boeing Engineers Lost Control of the Company

#202

Earlier quoted context omitted.

If Boeing (management, or board, or shareholders) wants to give part of the company to the employees, that's their business. But if Sanders makes them, that's taking the company from the shareholders. That's nationalization. The fact that he then gives it to the employees doesn't change the fact that the government took it in the first place.

That's patently absurd, and you know it. >Nationalization: >the transfer of a major branch of industry or commerce from private to state ownership or control. Employee ownership is not state ownership. By this logic, the US already has state-owned healthcare, since the government mandates that employers provide health coverage. Do you also believe that the US government is seizing business revenue by requiring that e…

> That's patently absurd, and you know it.

Sure, let's go with the personal attack and the claim of bad faith when we don't like someone's position. (That's against site guidelines, by the way.)

> Employee ownership is not state ownership.

But who gave it to the workers? Who made the current owners give up control? The state. (That's almost certainly still a "taking" within the meaning of the Fifth Amendment. That means "just compensation" for the current owners. Where are you going to get the money?)

> By this logic, the US already has state-owned healthcare, since the government mandates that employers provide health coverage. Do you also believe that the US government is seizing business revenue by requiring that employers pay wages?

Your "logic" here is non-existent. It doesn't follow from my position whatsoever.

> You're just desperate to find a snarl-word...

False. Again the accusation of bad faith.

> you can attach to this obviously reasonable...

Excuse me? Obviously reasonable? I call BS.

> and largely undisruptive plan.

That's quite an assumption there. Or as they say in court: "Objection, your honor. Assumes facts not in evidence."

You're mighty free with what you're going to require other people to do with their property. I don't own that much property, but I deny your right to order me to give half of it to those that you think should own it.

Re: Boeing Engineers Lost Control of the Company

#203

I don't understand how this was a software failure. From everything I've ever read about this issue, including this piece, the failure seems very much like a model & design failure. It seems like a systems & human factors engineering failure. Not a software failure.

There were absolutely software design failures - to have two sensors but only read the value of one of them and to not even apply sanity checks to check the sensor is working (e.g. is the sensor saying that the aircraft is pointing towards the sky when it's on the ground?).

It's simply crazy. The only plausible explanation is that Boeing did not perceive MCAS to be safety critical, even though it had control of the aircraft, and so they didn't bother to apply any redundancy to it. Boeing seemed to wrongly assume that any failure modes would appear as a runaway trim.

Re: Boeing Engineers Lost Control of the Company

#204

Earlier quoted context omitted.

Is this the five independent bit flips in worst possible order and combination from cosmic rays failure? First -> if this is your worst failure mode (ie, worse than pilot error, mechanical fatigue and failure, engine failures, fueling issues, crazy passengers etc) then you have a plane and overall safety system that is incredible. Second -> this wild set of events again does not crash the plane - though it would put…

>First -> if this is your worst failure mode (ie, worse than pilot error, mechanical fatigue and failure, engine failures, fueling issues, crazy passengers etc) then you have a plane and overall safety system that is incredible. Or would be, if it didn't violate design constraints that demand no single point of failure can have the capability to result in loss of the aircraft. I.e. components with failure profiles of…

There's lots of potential for failure that the planes allow when flying.

Some quick examples - they could have sensors around gas quality but do not - they rely on the folks providing the avgas to have good fuel. They could do built in weight and balance calcs with sensors - they do not, they rely on poor estimates for that. etc.

Boeing in particular ALLOWS pilots to fly planes outside of most flight envelope limits. They do this in part because historically they didn't trust the computer as much and trusted pilots more.

Airbus by contrast doesn't let you do this unless you take air data totally offline or something crazy to force alternative law. I suspect boeing will be moving towards the airbus model which is probably right. Airbus had arguably less local myopia when designing their planes - ie, future pilot populations come from a big group and making the plane as error proof as possible is best. Airbus had some issues around their automation without pilot override initially but I think those are resolved by now.

If you want a scary video - check out this early A320 flying - first fly by wire / autothrottle:

https://www.youtube.com/watch?v=YAg-WauGrLU

Can't have been a good feeling as that pilot. Note that the A320 is now considered a very safe plane.

Aircraft have evolved from systems with almost no built in redundancy or safety. The design of the 737 is pretty old - 1967 or so. Let that sink in for a bit, consider what type of tech they had back in. This is not a 777 generation plane or even A320.

Re: Boeing Engineers Lost Control of the Company

#205
post #197

Earlier quoted context omitted.

I don't disagree, it is grating, but I read it more as an observation than as an intent. When you are in senior management, you make decisions based on their overall effect on the company's financial health or future growth. That is your job, just like it is the engineer's job to make decisions based on overall safety and reliability or future capability. The debate, or perhaps the proof, is what happens next. Every…

>When you are in senior management, you make decisions based on their overall effect on the company's financial health or future growth. That is your job, just like it is the engineer's job to make decisions based on overall safety and reliability or future capability. I find this statement very troubling. You seem to be absolving the corporate/C-level class of any moral or ethical culpability when it comes to the co…

My intent is not to absolve anyone of anything. Rather I was illustrating the process by which individual choices can lead to a collective decision of prioritizing profits over safety.

Re: Boeing Engineers Lost Control of the Company

#206
post #74
post #2

> Why did Boeing buy McDonnell-Douglas? Because the airplane manufacturing industry is consolidating, and Boeing is pursuing profit at the expense of human lives. Was it really necessary to add the second part to explain why the merger occured? 'industry is consolidating' seems reason enough. The mixing of explanation with moralism in every sentence is grating. Put the moralism and ethics in it's own paragraph so we…

>The mixing of explanation with moralism in every sentence is grating. At the fundamental level, Engineering is a social/ethical process, not a technical one. Yes, engineers tend to have technical skills but when you use those skills to design a bridge you must always keep society (the users of your product) at the forefront of your mind. What separates engineers from "skilled people" is professional ethics. An engin…

What would you call the process by which the defense sector designs and builds weapons? This cannot be "engineering" by your definition, as the people involved are not consulted on the foreign policy objectives their work will serve, but it's probably what others in the thread think the word means.

Even in bridge building, the balancing of human civilization's advantages against its environmental cost is a matter of public policy. Engineers may be consulted to assess environmental impact or to provide lower-impact options, but "should we have a bridge here or not" is ultimately a question for political leaders, not engineers.

Re: Boeing Engineers Lost Control of the Company

#207
post #193
post #74

Earlier quoted context omitted.

>The mixing of explanation with moralism in every sentence is grating. At the fundamental level, Engineering is a social/ethical process, not a technical one. Yes, engineers tend to have technical skills but when you use those skills to design a bridge you must always keep society (the users of your product) at the forefront of your mind. What separates engineers from "skilled people" is professional ethics. An engin…

>why they find this comment so inappropriate It is just wrong. >Engineering is a social/ethical process, not a technical one This is just bizarre. >Yes, engineers tend to have technical skills ... tend to have??? >What separates engineers from "skilled people" is professional ethics I'd argue that it is specialized education > when you use those skills to design a bridge >An engineer... who does not consider the ethi…

>I'd argue that it is specialized education

Part of which in many programs includes familiarization with ethics coincidentally.

>A bridge is usually designed by a team of engineers... how do you bring ethics into calculating the amount of rebar in your concrete slab??

You are not a calculator. You are responsible for ensuring your specific part is correct, yes; but being conferred with the power to halt something that isn't up to snuff or to reject a plan for unsoundness also implies a responsibility to exercise that discretion. You (as the engineer) have those technical chops that others do not.

If you bow out and rubber stamp without a thought to the consequences of your actions, you aren't fulfilling your duty to the Public. With a bridge it's more straightforward, so it doesn't necessarily avail the civil engineer of the opportunity to exercise that discretion, but it is nevertheless there.

Re: Boeing Engineers Lost Control of the Company

#208
post #74

Earlier quoted context omitted.

>The mixing of explanation with moralism in every sentence is grating. At the fundamental level, Engineering is a social/ethical process, not a technical one. Yes, engineers tend to have technical skills but when you use those skills to design a bridge you must always keep society (the users of your product) at the forefront of your mind. What separates engineers from "skilled people" is professional ethics. An engin…

What would you call the process by which the defense sector designs and builds weapons? This cannot be "engineering" by your definition, as the people involved are not consulted on the foreign policy objectives their work will serve, but it's probably what others in the thread think the word means. Even in bridge building, the balancing of human civilization's advantages against its environmental cost is a matter of…

I believe if you go back and read my comment you'll find I said engineers need to consider the ethical ramifications of their work.

I neither prescribed a particular ethical conclusion nor required consultation for my definition. There are lots of people who choose not to work in Defense because of the ethical considerations. There are others whose personal senses of ethics are not offended by the idea of making weapons, or at least are assuaged by the money. I would argue the same interplay between ethics and compensation is at work in e.g. Facebook and other surveillance firms. Quite obviously some people don't mind working for Facebook, even though I personally would find that repugnant.

What I'm not saying is that someone who works for Facebook "isn't an engineer" because I happen to disagree with their ethical choices. I'm saying that if you call yourself an engineer and you don't consider/ignore the ethical consequences of your work then you are an impostor.

The link to the topic at hand/reason I brought this up is that the 737 MAX issue (or the MCAS issue) isn't a technological problem so much as an ethical problem. Considering the technical faults in isolation ("putting the moralism and ethics in their own paragraph") is deliberately blinding one's self to the crux of the issue.

Re: Boeing Engineers Lost Control of the Company

#209
post #180

Earlier quoted context omitted.

Amazon is a case of purposely cultivating long-term investors and analysts. Somehow they made a case that their intangible NPV is much larger than other companies with similar profits. However, history indicates that a CFO will soon take over, start outsourcing, and they will be more profitable, but their long-term investors will sell to short-term investors and give them short-term valuations (lower NPV).

Jeff would never give up any control, at least not until there are O'neil cylinders in orbit.

He is selling Amazon stock every year to fund Blue Origin. I sure hope he can start turning a profit on his space company and gets his O'Neill cylinders before he runs out of cash.

Re: Boeing Engineers Lost Control of the Company

#210
Didn’t get to read the full article, but it sounds like a case of snakes in suits. Did the leaders and managers in charge at the time the poor engineering took place get any sort of reprimanding or blame, or have they walked away with accolades of their quarterly performance and cost savings with continued increases in salaries and public reputation?
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