mjgbtv wrote:I got the impression from the FAA briefing that they had seen some video.
What do the experts say about the audio transcription (IF it is accurate as reported here)? Is it SOP for the controller to ask so many questions rather than facilitate an expedient return? Say what? Listening to the ATC recordings (assuming they were posted to the newspaper web site complete) the ...Jump to post
https://www.seattletimes.com/business/boeing-aerospace/boeing-pushed-faa-to-arelax-737-max-certification-requirements-for-crew-alerts/ quote: Boeing’s state-of-the-art system Early in the development of the 737 MAX, Boeing considered equipping the flight deck with its state-of-the-art flight-crew a...Jump to post
Sorry but statistically you're going to have to on 50% of the flights you fly on, whether you like it or not. Because that's how averages work. :roll: Sorry but that's how median works, not average. If the distribution can be biased -- by better selection processes, better training, a better pool o...Jump to post
From an AP story -- " He [WN pilot union chairman for training] said the FAA is considering revising a half-dozen pilot checklists related to MCAS and flight-control computers, which he said would take at least 30 days ." https://www.yahoo.com/sports/southwest-pilots-see-february-march-224...Jump to post
You may want to also note NTSB's push back on the FAA's four second reaction time with 100% accuracy standard, and its desire to shift to the ill-defined "average pilot" standard instead, which is troubling because forty nine percent of pilots are below average. 49% of pilots are below th...Jump to post
Does this mean that a software limit was added to MCAS to not allow the pilot to electrically trim out all of the MCAS input? IF that is the case, then the runaway stabilizer NNC as written would not work once the MCAS runaway progressed beyond a certain point. It's likely the runaway pitch trim NN...Jump to post
We have 2 opposite requirements (1)think before pushing random switches - which is a generic approach for complex systems. (2) 3 second response required by MCAS - response to high threat situation. If you see a lion, lion also sees you... Think about what works best in modern world. What works bes...Jump to post
One of the main points to control speed is elevator and trim. Speed is controlled with the thrust levers. The ET crew -- for whatever reason -- failed to use them. There has been a narrative growing on this thread amongst the large number of "crew apologists" (to be distinguished from the...Jump to post
but I wait to read the accident investigation reports. I read mist AAIB ones. The reports you refer to will not be coming from the AAIB (or the NTSB either). I realise that it will not be AAIB or NTSB - but if you read those you should understand how these things are written. I do read them and adm...Jump to post
They should not even mention the pilots, who are unable to defend themselves from any blame. I say lets go one better. Let's make this retroactive. Change all previous official accident reports concluding that some form of pilot error was involved where the crew did not survive to eliminate any ref...Jump to post
I really wonder, why the FAA did not insist on test flights with the MCAS switched off too. Schrödingers 737 cat: If you don't look the cat is still alive. When the MAX starts flying again everybody, their brother, and his dog will be watching and the waveform collapses. Boeing has been burned very...Jump to post
I believe Boeing would be better off not betting on a staggered RTS but in waiting for full global RTS and approval by not just the FAA but also EASA, CAAC and others for the max. That would show the world that safety comes before profit and that they've learnt from this horrible mistake. Reality l...Jump to post
In the airline industry, VFR as visiting friends and relatives is probably actually used more than visual flight rules since there is far more discussion over market forces, routes and traffic levels than there is over actual clear-day operating conditions. How many airline operations are done Visu...Jump to post
I imagine EASA will be flying MCAS-off stall test points to inform their opinion. Why would they do this? The aerodynamic stall characteristics of the MAX were determined during the original flight test campaign. MCAS would not have had any effect on that. Or, if MCAS (1.0 or 2.0) does somehow alte...Jump to post
Parts carriers for the auto industry, always a dodgy deal. What makes you say that? Just curious? Well, when I flew checks we lost 4 planes and pilots in 3 years. Guys in the check flying business thought auto parts was a cutthroat, marginal operation. I’ve seen operators that still in the business...Jump to post
no read the EASA documents are already postet here in that thread its written word by word "... has a tendency to pitch up..." and "... has a tendency to stall at about 16% (or 16 degree) AoA ..." That document also calls MCAS an Anti-Stall system. It's like EASA developed it's ...Jump to post
You do not use every tiny bit of structure capabilities in routine operation. This is something called "safety margin" - to account for imperfections, wear, statistical variation etc. Correct. My post was about certification, though. Based on some replies it sounds like the airplane will ...Jump to post
asdf wrote:a fail @ 99% of the 150% load is simply bad luck
I agree that the two main aviation authorities - FAA and EASA - should stand in unison when it comes to these things. But I think there was a break of trust between them after the 737 MAX saga. Which is understandable. The FAA will not wait too long for other sovereign aviation authorities to agree...Jump to post
But at the same time no "silly walks" about stick feedback preventing the pilot from flying the plane. I am no pilot or aeronautical engineer, but my understanding is that stick force requirements are in the regulations so that pilots can recognize a seriously out of trim situation and fi...Jump to post
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