Search found 422 matches

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by XRAYretired
Thu Jul 18, 2019 4:21 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Talking about additional delays after ET is pointless because it was already too late for quick fixes. 3-4 Month maybe is quick, but end of March would be full 5 month. Maybe I'm wrong, and they could not do it fast because they wanted to bundle up a whole bunch of fixes into a single update, inste...

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by XRAYretired
Thu Jul 18, 2019 11:13 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

But not on technical level. What is happening now has to happen the way it does and it is good that they are taking a close look at the processes, but on technical level this problem is easy to handle, maybe not easy given the current hardware on the 737MAX, but that is solely Boeing´s problem and ...

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by XRAYretired
Wed Jul 17, 2019 2:04 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The FAA+EASA 5 "things" for the 737-8/9 are directly related to certification requirement non-conformity that Boeing must address now, instead to having addressed them at the right time: before releasing the 737-8/9 for commercial flight. Those "things" are not only design error...

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by XRAYretired
Mon Jul 15, 2019 3:45 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I don't know why EASA is calling manual trim system "aisle stand trim switches". Could be what Boeing is referring to manual trim system in their submitted document The EASA document does specifically refers to trim wheel later in the same cited paragraphs Reckon they just got their 'whee...

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by XRAYretired
Mon Jul 15, 2019 1:18 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Is an MCAS type event (accident) more or less likely when the MAX-8 flies empty to a storage airport? Boeing are still flying these new builds around the US daily. The "MCAS type event" we have are both due to faulty Angle of Attack sensors causing the flawed MCAS 1.0 system to kick in, a...

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by XRAYretired
Sun Jul 14, 2019 7:21 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I find it rather strange that BOEING has only publicly stated they have set aside 1 billion for this fiasco... it will be in the several billions It can wait. For the time being Boeing will fix the plane and have it certified so they can deliver planes again. $1B is plenty of money for that. At som...

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by XRAYretired
Sat Jul 13, 2019 5:42 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Well, so the telephone was invented in the USA? Tell that to Alexander Graham Bell… And if it is the measure of the quality of the editorial, well… It just reminds me that time, in the early years of A.net, when a piece directly from Boeing's PR was reproduced here, which said that Boeing had inven...

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by XRAYretired
Sat Jul 13, 2019 6:51 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Interesting new lawsuit pulling Southwest into the mix. https://www.prnewswire.com/news-releases/pierce-bainbridge-files-rico-and-consumer-fraud-class-action-against-southwest-and-boeing-in-connection-with-the-max-8-and-max-series-300884228.html Ray The lawsuit that was recently filed against WN an...

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by XRAYretired
Mon Jul 08, 2019 9:24 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

737-8/9 MAX flight computer processor is likely to be a 80286. Single core. https://www.moonofalabama.org/2019/06/boeings-software-fix-for-the-737-max-problem-overwhelms-the-planes-computer.html#more https://en.wikipedia.org/wiki/Boeing_737_MAX_groundings#Flight_control_data_processing_issue I and ...

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by XRAYretired
Sun Jul 07, 2019 7:59 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

It's puzzling that Boeing's proposed fix is to use multiple processors instead of a higher throughput processor. If 2 cores isn't enough, use 4 cores, or 6 cores, or 8 cores, or 10 cores. Multiple CPUs add overhead. For redundancy, a second x-core processor, rather than four, 2-core processors. 737...

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by XRAYretired
Sun Jul 07, 2019 1:30 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The most interesting thing about the article being discussed is that EASA has provided a list of things Boeing needs to address. Up to this point their concerns were open ended if not nebulous. From my point of view this probably bounds the amount of time that 737 will be grounded. Their list of co...

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by XRAYretired
Fri Jul 05, 2019 7:03 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Perhaps the poster meant to link todays Bloomberg. https://www.bloomberg.com/news/articles/2019-07-05/europe-sets-out-demands-for-boeing-before-max-can-fly-again Ray And this is going to be a pain... EASA’s checklist includes the potential difficulty pilots have in turning the jet’s manual trim whe...

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by XRAYretired
Fri Jul 05, 2019 6:00 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Europe (EASA) just outlined its own demands before it will let the MAX fly in Europe https://www.businessinsider.com/boeing-737-max-europe-requirements-plane-return-2019-5 Apparently they won;t be trusting FAA's soothing words any more. The article is dated from 22 May 2019, 14:10. An update would ...

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by XRAYretired
Fri Jul 05, 2019 1:45 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

https://leehamnews.com/2019/07/05/bjorns-corner-cutting-corners-in-aerospace-costs-a-fortune/#more-30604 His story leans heavily on a statement that is opposite of what other sources say, namely: An aerodynamic solution to the problem could have been made but a software fix was easier and cheaper t...

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by XRAYretired
Thu Jul 04, 2019 8:29 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

https://www.flightglobal.com/news/artic ... ue-459465/

Ray
-->

I see fixing the latest processor hang up problem is to 'reduce pilot workload', as well as the MCAS fix is - Boeing CEO. Thought this guy was supposed to be an engineer?
https://www.flightglobal.com/news/artic ... ue-459465/

Ray

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by XRAYretired
Thu Jul 04, 2019 7:09 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I wonder how much Boeing will ask in compensation from Rockwell-Collins. I wonder whether Boeing will compensate the airlines for the missed fuel burn delta. The business case of buying and operating the MAX is currently not working out for the airlines. They have a competitive disadvantage vs. the...

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by XRAYretired
Wed Jul 03, 2019 8:21 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

You are missing the point, the problem is the MCAS behaviour during a malfunction in the system. The actual designed function of MCAS was not the problem, the undesired side effect of a faulty sensor was. False actuation malfunction probability is strongly reduced with 2 sensor approach, and severi...

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by XRAYretired
Wed Jul 03, 2019 8:13 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I hope you don’t mind, Ray, but I’m going to quickly summarize the most important details of your writeup, in slightly less technical language. With function AOA sensors: When the sensors read above a certain level, MCAS 2.0 will activate once. If all is well with the plane, MCAS will reduce the AO...

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by XRAYretired
Wed Jul 03, 2019 6:06 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

It sure is rare event and single pilot is unlikely to encounter it ever. However that does not mean anything whether MCAS is a needed functionality on a plane. There are multiple other systems on a plane that one pilot is never going to need but they still better be onboard for the next pilot that ...

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by XRAYretired
Wed Jul 03, 2019 1:38 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The assumption behind MCAS single-shot design is that it is rarely, if ever, needed in flight. That makes some sense, actually; the airplane is not supposed to go into outer edges of the envelope. Most what I heard so far, MCAS is for extreme collision-avoidance manuring and few similar situations....

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by XRAYretired
Wed Jul 03, 2019 11:17 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

More bad press! https://www.businessinsider.com/boeing-737-max-victims-families-say-received-no-support-apology-2019-6 And meanwhile in India, engineers are protesting at being even associated with the max. https://interestingengineering.com/indian-engineers-call-foul-after-being-connected-to-boein...

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by XRAYretired
Wed Jul 03, 2019 9:19 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

OK, I see and agree. It is important to distinguish between failure to work, and false activation. I agree that the second apple(s) will still prevent false activation when the first apple(s) fails. Thanks. Good O. Just rough estimates of course cos we dont have the real numbers. We could put a bet...

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by XRAYretired
Wed Jul 03, 2019 8:49 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

In my mind, but that may just be me, single-sensor thing correlates to each parameter. If MCAS x.x needs AoA and G to do its thing, that would be two parameters. But if one (or both) of these parameters only rely on one sensor (i.e. one AoA sensor), its architecture is still what I would call, sing...

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by XRAYretired
Tue Jul 02, 2019 3:58 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The single sensor STS thing seems to come up periodically as some sort of justification for changing to a single sensor MCAS or avoiding having a two sensor MCAS post V0.0. In my mind, but that may just be me, single-sensor thing correlates to each parameter. If MCAS x.x needs AoA and G to do its t...

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by XRAYretired
Tue Jul 02, 2019 3:23 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Single point of failure is probably what your talking around. 2 input signals are of little use except in declaring your system is broken - you don't know how its broken or what specific part is broken - you just know its broken as they disagree. 2 sensor is fail safe when compared, except when bot...

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by XRAYretired
Tue Jul 02, 2019 3:04 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Single point of failure is probably what your talking around. 2 input signals are of little use except in declaring your system is broken - you don't know how its broken or what specific part is broken - you just know its broken as they disagree. 2 sensor is fail safe when compared, except when bot...

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by XRAYretired
Tue Jul 02, 2019 2:55 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Single point of failure is probably what your talking around. 2 input signals are of little use except in declaring your system is broken - you don't know how its broken or what specific part is broken - you just know its broken as they disagree. 2 sensors compared is fail safe. I sensor is not - e...

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by XRAYretired
Tue Jul 02, 2019 2:50 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Single point of failure is probably what your talking around. 2 input signals are of little use except in declaring your system is broken - you don't know how its broken or what specific part is broken - you just know its broken as they disagree. 2 sensor is fail safe when compared, except when bot...

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by XRAYretired
Tue Jul 02, 2019 11:06 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

There is nothing wrong with using single sensor, STS also relies on single air speed signal. The key is to limit control authority so that elevator still can overpower stab in fault condition From the Bloomberg article: "During the crashes of Lion Air and Ethiopian Airlines planes that killed ...

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by XRAYretired
Mon Jul 01, 2019 6:08 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Sorry, you cant say the deign isn't the design. Except you just did! Relax. The poster I quoted was trying to provide the summary of "known facts" that a previous poster had requested for part 1 this new thread. I was just trying to clean up the "known facts" part in the interes...

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by XRAYretired
Mon Jul 01, 2019 2:55 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Seriously - there is an opportunity to make the plane safer with two sensors AND limiting authority But people are proposing just limit the authority next time and just accept more fault conditions in the future rather than less? Why? Really - that's the approach to safety now is it? On a plane thi...

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by XRAYretired
Mon Jul 01, 2019 1:58 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

(3). Per an anonymous Boeing employee interview (see 60 Minutes Australia), MCAS 1.0 was intentionally designed to use exactly one AOA sensor. I believe this is not correct. MCAS 0.0 was designed with two sensor inputs: one AoA and G. When it was discovered during flight test that the "stick l...

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by XRAYretired
Mon Jul 01, 2019 11:26 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

1) I seriously doubt the tasks you described regarding MCAS are outlier among all other tasks FCC has to do. It has to monitor the flight anyway, so MCAS 2.0 could be only the last straw that broke the camel's back, and not the dominant CPU hogger, IF the problem appeared first with MCAS 2.0. I ser...

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by XRAYretired
Mon Jul 01, 2019 10:00 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 828
Views: 118783

Re: Boeing 737MAX Grounded Worldwide Q3 2019

So if adding MCAS fix caused the overload of FCC computer(s), and MCAS is part of STS, can we say that STS is not a separate LRU but has been merged into FCC? But I think it was Captain Carey who, in the recent congressional hearing, stated that MCAS was a federated system. Also, do we know if the ...

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by XRAYretired
Sat Jun 29, 2019 6:40 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

I believe Boeing did not use HCL or Cyient for MCAS. However I remember reading from somewhere months ago that MCAS SW was subcontracted to some other company which I cannot remember else than it had a respected American company name. Whether that other company used 9$ engineers is another discussi...

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by XRAYretired
Sat Jun 29, 2019 12:00 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Incredible. 737MAX, designed by third world engineers. The Cheapest. The software was, not the MAX itself. It’s disgraceful enough without your hyperbole Wait, did anyone actually read the article? If you did, you'd find it is click bait using the MAX tragedy as a vehicle to vent frustration about ...

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by XRAYretired
Sat Jun 29, 2019 11:29 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

to me, it has always been completely irrelevant that MCAS was intermittent. The big failure that was missed is that the same thing that would cause MCAS cause a runaway stabilizer ALSO caused other issues simultaneously. This factor is the reason that I believe the lack of documentation of MCAS and...

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by XRAYretired
Fri Jun 28, 2019 9:00 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Many, including me, attest to the belief that the system design and safety analysis was incompetent (for whatever reasons). There has been no indication anywhere that the software design, implementation and validation was not complaint with DO-178 or in any way had a 'glitch', was 'flawed' or any o...

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by XRAYretired
Fri Jun 28, 2019 3:32 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

I think given the MCAS disaster and the history of Boeing regarding non compliance, undue pressures on FAA-appointed, Boeing-employed inspectors the proper certification of anything should not been taken for granted. MCAS has shown that anything could be circumvented by declaring that issue has dif...

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by XRAYretired
Fri Jun 28, 2019 1:35 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

"DO-178C, Software Considerations in Airborne Systems and Equipment Certification is the primary document by which the certification authorities such as FAA, EASA and Transport Canada approve all commercial software-based aerospace systems." https://en.wikipedia.org/wiki/DO-178C I think g...

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by XRAYretired
Fri Jun 28, 2019 1:27 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

For the first time media mentions possibility of return to service in April 2020. https://www.forbes.com/sites/petercohan/2019/06/28/runaway-stabilizer-condition-could-delay-boeing-737-maxs-return-to-2020/#1594cdc14206 I can see that. If a new system needs to be developed, tested, certified and pro...

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by XRAYretired
Fri Jun 28, 2019 1:14 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

I think you’ve quoted the wrong person here. That’s not quote. I’ll also say that everything I’ve said there is true and I’ve been developing software for real-time safety related systems for two decades. I’m intimately familiar the vast majority of real-time OSs out there, having deployed applicat...

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by XRAYretired
Fri Jun 28, 2019 10:54 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

So to speculate, the ET pilots understood it was MCAS, initiated the appropriate NNC but when the response was not immediate they moved on? IF the problem was in the original software, not introduced with MAX 2.0. Either way this is potentially worse than MCAS issue: 1) IF the original firmware had...

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by XRAYretired
Fri Jun 28, 2019 10:43 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

No need to find the QRH as the response to a Stab Trim Runaway is a memory item, as stated many times on this thread.. I don't think you understand the situation. The problem is that the pilots may do the right action and not see the plane respond quickly enough because the computer is overloaded. ...

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by XRAYretired
Fri Jun 28, 2019 9:21 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Also, from the article I posted above it sounds like the FAA went looking for this failure mode and were not really surprised when the aircraft didnt react as it was supposed to With bot Lion and ET investigation still ongoing and this being unprecedented situation for a long time, perhaps they got...

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by XRAYretired
Thu Jun 27, 2019 7:25 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Is 3 seconds sufficient to recognize a runaway trim in a stand-alone failure scenario (leaving aside that usually other issues be present at the same time)? If we look at MCAS, it has a 9 second cycle. Should pilots be expected to disable MCAS after only 3 seconds, or should they allow at least a f...

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by XRAYretired
Thu Jun 27, 2019 6:23 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Just imagine for a moment spending a few seconds finding the QRH which then tells you to repond within 3 seconds. No it doesnt, nor does the EID because it is ludicrous. Ray No need to find the QRH as the response to a Stab Trim Runaway is a memory item, as stated many times on this thread.. Just a...

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by XRAYretired
Thu Jun 27, 2019 6:20 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

As I read it, the 3 seconds is about control response to an upset, e.g. pulling the stick back and getting a relevant response when the nose drops unexpectedly, within 3 seconds. It has nothing to do or say about identifying an airframe or system cause of the upset in the first place or doing somet...

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by XRAYretired
Thu Jun 27, 2019 6:12 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 383132

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Its more likely that the issue is having only 2 rather than 3 sensors Boeing have had to add a whole bunch of processing logic to determine which one is good / bad (are they both bad?) and are doing this by comparing with other instruments / processes. This iterative process has to run often and is...

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