Okay… about pilot training, here’s my question to all poster here. Was it reasonable for Boeing to design MCAS v1 as it did, with the justification that the pilots should know how to save the plane? " Well, it seemed like a good idea at the time ." anon. Yes, it was reasonable. The proble...Jump to post
tu204 wrote:(with a buzz)
I almost thought I could fly the thing. I am good at turning nobs. You just about could. Engage LNAV and VNAV right after gear up, get no curve balls thrown at you by ATC en route, no unpredicted weather, an airplane and a runway equipped for auto-land, someone to point to the right knobs and just ...Jump to post
It is truly remarkable that there is zero official info coming from Boeing on that new issue from June. The only thing that came from Boeing is that "new issue has been identified by FAA" and "it will be fixed in September". Why can't they elaborate just a little bit so that the...Jump to post
I still don't quite understand the reason for the "stick lightening," though I believe the issue has to do with an FAR specifying that in certain situations stick forces must increase with increasing airspeed, something like 1 lb per 6 kts increase or something like that. The MAX apparent...Jump to post
par13del wrote:Ever thought we could be grateful the 737 was not full FBW, this would be it, imagine rewriting that much code for deployment and testing in 3 months.
par13del wrote:planecane wrote:they also have a requirement to ensure that failures are contained right?
NYT suggests that Boeing management is pressuring engineers to keep costs low to keep the stock price high, presumably because management bonuses are often stock grants or options. Management remuneration (not just bonuses) often is heavily influenced by stock price period. If the (major, at any ra...Jump to post
So building MAX simulators is also on hold by the FAA? There is no "building" of anything that is "on hold" by the FAA. MAXs are still being built at a rate of 40 or so per month (at least until Q4). Sim builders can build as many MAX sims as they want. Of course, they'll have t...Jump to post
blueglacier737 wrote:I'm a mechanic on the 737 MAX final assembly in Renton, Washington.
For those predicting financial doom for Boeing or wondering why its stock price has held up as well as it has -- https://www.barrons.com/articles/how-much-boeing-stock-worth-if-737-max-never-flies-again-51563305527?siteid=yhoof2&yptr=yahoo EDIT: This link may work better -- https://finance.yahoo...Jump to post
Until the final repot on the ET crash, I won't categorize it as "bad luck." You've missed my point entirely. The two crashes definitely were not due to "bad luck." The bad luck enters due to the two crashes occurring so close to each other and under virtually identical circumsta...Jump to post
I totally agree, my point is that the pain of the Max grounding is bad, but imagine if it was 1,500 planes or 20% of the current in service fleet, that would be a disaster for aviation. not shure if they would have grounded it then .... Right. Hours/cycles would be a better measure, but these two c...Jump to post
The thread title is incorrect. It's through October... plus a couple of days in November.
The situation is bad enough without any exaggeration.
The cost of the eventual fix and the compensation payments must have wiped out any profit Boeing could hope to make on these birds. I'm going to go waaaaaaaaay out on a limb ( :D ) and predict that the MAX eventually will end up just as much a cash cow for Boeing as its ancestors have been. Boeing ...Jump to post
Boeing should add a safety mechanism to the 737 MAX that will disable MCAS if the plane is descending too quickly in order to avoid another tragedy similar to JT 610 or ET 302. This safety mechanism should be designed at safety level A (catastrophic failure condition), and this safety mechanism sho...Jump to post
Without reading through 8 million posts, how hard would it be for Boeing to convert the already built or nearly built MAXs to NGs should the MAX program be cancelled or severely postponed?... then market them to airlines with existing MAX orders at further discounts. Boeing likely would end up with...Jump to post
I'm shocked that they are still building 40 frames a month in Renton. It shows loyalty to their workers but at some point they'll have to stop. Loyalty to their workers likely has little to do with it. Boeing's stock has remained relatively stable (give the circumstances) but, per what I've heard o...Jump to post
I don't know. To me this argument sounds like "the purpose of a wall switch is to provide current to the light bulb, not to turn the light on". That argument would be valid except for the fact there are real stall prevention systems -- systems that actually prevent the pilot from stalling...Jump to post
It appears that some people still believe Boeing without hard data at hand. I (along with a number of others) have been making the "MCAS is not stall prevention" point often in these threads. But if I'm wrong and MCAS is a Boeing alpha prot/alph floor equivalent, minus the FBW, I will gen...Jump to post
If you hit a strong microburst in a bad weather approach you might be toast without MACS. Imagine you are on approach, before flaps are down at around 5000ft agl and you are hit by a strong microburst. Autopilot is immediately off and when you realized what happened you are 3500ft agl descending. Y...Jump to post
I have a question for those with the expertise to answer it: Exactly how do-able is safe recovery from a failure of the critical engine at precisely the most critical instant of takeoff in a King Air 350 being properly operated, heavily (not over-) loaded, in benign weather? Should any fully qualifi...Jump to post
Personally, I would like to see the test run again with line Max pilots not FAA Pilots. It's not beyond the scope for this to have been an attempt to "see we are being tough" by the FAA. I would not put this past them given their current quandary. There is simply too much of a disconnect ...Jump to post
In other words, if Boeing had bitten the bullet of the additional training costs associated with the pilot training that would have been required by the different handling characteristics of an NG and a MAX without MCAS, the MAX would still have been a highly fuel efficient plane and attractive to ...Jump to post
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...Jump to post
Have you ever seen a plane a twin lose an engine on take off? They're uncontrollable, there's no way to try and avoid something. I don't think any twin can be certified today if it can't fly with one engine out, even at the most critical point of takeoff. There may have been other issues. Ten peopl...Jump to post
(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...Jump to post
SteinarN wrote:So, we see, with these numbers, that we put in a positive 25.6 percent elevator travel going from 10 degrees to 14 degrees AOA, but at the same time MCAS puts in AND negative 71 percent worth of elevator travel
What happened? Did the FAA just fly the simulator and find a response problem with everything in normal operation, or did they simulate a broken piece of hardware by physically disabling part of the electronics? That is what we all like to know. They apparently, during the course of comprehensively...Jump to post
I don't think that the FAA "chose to leak", there are now expected to promptly communicate to the others administrations any important finding on the subject and consequently would loss credibility if there are not the first to announce the finding to the public. So why did they leak it i...Jump to post
Revelation wrote:Leak? Boeing itself made a statement to the capital markets which is not a leak but is the whole dam busting!
Seattle Times? version of MCAS design and development story, subtly different to the NYT version. Apologies if already posted. https://insurancenewsnet.com/oarticle/the-inside-story-of-mcas-how-boeings-737-max-system-gained-power-and-lost-safeguards#.XQ9DdfZFw2x Ray Great read. Very informative. Bo...Jump to post
GalaxyFlyer wrote:I’d like to see a link to the story, this doesn’t pass the smile test. Probably a 757 or 737.
Cost is a major factor, right? Two blade semi-rigid rotors likely are cheaper but still work very well. Of course they are susceptible to mast bumping, but then three blade systems are susceptible to ground resonance issues that, I think, two blade systems don't have.Jump to post
My apologies for the lack of detail, but I heard this story from someone while riding in a car with him and a number of other people. I could squeeze in only so many tech type questions during breaks in the conversation. This person was, within the last couple of weeks, flying AA Puerto Rico to DFW....Jump to post
]They've done their studies and found out that there is no market for a clean sheet MoM, or NSA, or whatever marketing name they'll come up with next. All their talk has been nothing but trying to trick Airbus into launching their own clean sheet, which as they know would be a commercial failure. P...Jump to post
There a lot of undelivered MAXs parked at Boeing Field and Everett. Obviously they were not trucked there from Renton. What are the precise circumstances under which the FAA allows MAXs to be flown (aside from test/certification flights)? Can Boeing move undelivered frames out of Washington state fo...Jump to post
My claim was that the ap could no longer fly the plane. you're saying this is wrong??? Say what? The bird strike occurred less than 4 minutes after departure. The AP would not have been on in the first place. The crew made 2 decisions that likely save everyone on board: ditch in the Hudson instead ...Jump to post
It’s interesting that this idea is found only in forums, and has never been reported in any media I can find. Why is that, do you suppose? Because the media can't realize any advertising dollars off such non-sensational information. The most damning article I have ever found is this one: https://ww...Jump to post
Not heard much from our aerodynamics guys since the NYT article. I'm struggling with a number of aspects of what we have now read and I'm sure others would find it useful to be able better grasp the nuances. Perhaps, If I elucidate. It is reported MCAS V0.0, that as well as AOA high triggered, was ...Jump to post
Reading this article, assuming that it is a true representation of what happened around MCAS, one could believe that rank amateurs are working at Boeing on safety critical issues. On the contrary, this information seems to answer one of the great mysteries surrounding these events: why presumably t...Jump to post
Off topic, but (sadly) timely and not completely irrelevant to the arguments here over Boeing's corporate attitude and responsibility toward these accidents --
14ccKemiskt wrote:Since Boeing themselves said that a fix was in the works already in november, it apparently took them at least six (!) months to implement. One wonders why it took so long time.
If we are revisiting lack of grounding, I'm surprised the RR 777s werent grounded after BA 038. The issue with the FOHE was dangerous. Hardly. BA038 was as close as you're going to see to a major airplane accident with no cause: no pilot error, no mechanical issue, no design flaw, no bad fuel, no b...Jump to post