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by hivue
Mon Jul 01, 2019 10:08 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 4380
Views: 670949

Re: Boeing 737MAX Grounded Worldwide Q3 2019

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 ...

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by hivue
Mon Jul 01, 2019 5:49 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 4380
Views: 670949

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 hivue
Mon Jul 01, 2019 2:04 am
Forum: Civil Aviation
Topic: Ten dead after King Air crashes shortly after takeoff
Replies: 71
Views: 19322

Re: Ten dead after King Air crashes shortly after takeoff

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...

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by hivue
Mon Jul 01, 2019 1:57 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 4380
Views: 670949

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 hivue
Sun Jun 30, 2019 7:23 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 4380
Views: 670949

Re: Boeing 737MAX Grounded Worldwide Q3 2019

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


MCAS works through the trimmable horizontal stabilizer, not the elevators.

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by hivue
Sat Jun 29, 2019 1:04 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

smartplane wrote:
The old adage, 'do it once, do it right' applies especially to commercial aviation safety, which Boeing needs to re-learn.


"Measure twice, cut once" would have been better advice for Boeing to have followed from the get-go.

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by hivue
Fri Jun 28, 2019 6:55 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Fri Jun 28, 2019 12:24 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

PixelFlight wrote:
In fact the FAA did communicate:


That communication communicates nothing. The FAA had to say something officially after the preliminary details were leaked -- apparently by one of their own.

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by hivue
Thu Jun 27, 2019 10:01 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Thu Jun 27, 2019 9:16 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

https://www.cnbc.com/video/2019/06/27/b ... issue.html?

The 2:50 mark.
-->

Revelation wrote:
Leak? Boeing itself made a statement to the capital markets which is not a leak but is the whole dam busting!


But it was leaked before that -- and Boeing didn't leak it:

https://www.cnbc.com/video/2019/06/27/b ... issue.html?

The 2:50 mark.

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by hivue
Thu Jun 27, 2019 1:34 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

CNBC were emphasizing this morning that the fact that the FAA chose to leak the microprocessor issue is very significant (sorry, no link to that story yet). I have to agree.

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by hivue
Sun Jun 23, 2019 8:57 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Sat Jun 22, 2019 2:34 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 1441
Views: 373213

Re: Boeing 777X Testing Thread - 2019

morrisond wrote:
If it's longevity would that hold them back from a first flight?


They know changes to the engine are needing to be made. They may want to run as much of the test campaign with as near the production spec engine as they can.

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by hivue
Thu Jun 20, 2019 10:13 pm
Forum: Technical/Operations
Topic: Stuck two nights in LIT: Can't push back
Replies: 23
Views: 3717

Re: Stuck two nights in LIT: Can't push back

GalaxyFlyer wrote:
I’d like to see a link to the story, this doesn’t pass the smile test. Probably a 757 or 737.


The story was told by the person I mentioned under the circumstances I noted. There is no link.

It's hard to imagine that LIT wouldn't have a tow bar that could handle a 757 (let alone a 737).

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by hivue
Thu Jun 20, 2019 8:27 pm
Forum: Technical/Operations
Topic: Benefits of a 2 blade rotor
Replies: 15
Views: 4014

Re: Benefits of a 2 blade rotor

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.

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by hivue
Thu Jun 20, 2019 8:17 pm
Forum: Technical/Operations
Topic: Stuck two nights in LIT: Can't push back
Replies: 23
Views: 3717

Stuck two nights in LIT: Can't push back

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....

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by hivue
Tue Jun 18, 2019 5:54 pm
Forum: Civil Aviation
Topic: Business Risk for Boeing: The A321XLR
Replies: 410
Views: 50603

Re: Business Risk for Boeing: The A321XLR

]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...

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by hivue
Thu Jun 13, 2019 8:41 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Wed Jun 12, 2019 3:52 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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 ...

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by hivue
Mon Jun 10, 2019 9:49 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Tue Jun 04, 2019 3:44 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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 ...

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by hivue
Mon Jun 03, 2019 6:09 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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...

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by hivue
Tue May 21, 2019 7:08 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

https://www.youtube.com/watch?v=E42NN1rU93o

RIP Niki.
-->

Off topic, but (sadly) timely and not completely irrelevant to the arguments here over Boeing's corporate attitude and responsibility toward these accidents --

https://www.youtube.com/watch?v=E42NN1rU93o

RIP Niki.

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by hivue
Thu May 16, 2019 8:19 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

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.


Because they learned their lesson after their MCAS 1 slap-dash patch and decided to take time to do it right for MCAS 2?

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by hivue
Wed May 15, 2019 8:41 pm
Forum: Civil Aviation
Topic: Why weren’t the A330s grounded after the pitot tube issues?
Replies: 94
Views: 17832

Re: Why weren’t the A330s not grounded after the pitot tube issues?

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...

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by hivue
Sun May 12, 2019 2:19 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

This i probably old news, but the claim that MCAS relied on only one AoA sensor was a deliberate design choice in order to avoid extra training for pilots, since new two-sensor features would require just that, is horrifying. https://youtu.be/QytfYyHmxtc?t=35m23s And doesn't make any sense, especia...

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by hivue
Wed May 08, 2019 10:09 pm
Forum: Technical/Operations
Topic: Direct mode charachteristics and currency
Replies: 12
Views: 2275

Re: Direct mode charachteristics and currency

Starlionblue wrote:
the only two reasons to end up in Alternate or Direct Law would be either if some malfunction triggers a reversion, or if some line in an ECAM/QRH procedure you have to perform triggers a reversion.


For functional check flights following mx are Alternate and Direct law behavior never tested?

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by hivue
Tue May 07, 2019 10:15 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Redactions to see if the pilot, who (perfectly reasonably) ignored checklists would be trashed for not following those. They didn't ignore checklists. They ran the only one that was close to applicable. The Captain did order the APU on prior to reaching that item in the checklist, which is one of t...

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by hivue
Tue May 07, 2019 9:45 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

BTW, an interesting quote from one serious accident investigation report in somewhat similar situation: According to {companyname}, the {whathappened} Failure checklist was originally developed “based on the highest probability in time of exposure that a {whathappened} failure would occur.” Because...

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by hivue
Tue May 07, 2019 4:43 pm
Forum: Civil Aviation
Topic: Updated: Aeroflot 1492 SSJ100 fire at Moscow (SVO) - 40+ confirmed dead
Replies: 832
Views: 157238

Re: Updated: Aeroflot 1492 SSJ100 fire at Moscow (SVO) - 40+ confirmed dead

I'm also quite suspicious of the pilot's initial statement that he didn't notice anything wrong with the landing, when the video clearly shows the horrific bounce. And after the bounce a failure to abort a landing attempt that long ago had gone pear shaped. Here is a fascinating first hand account ...

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by hivue
Mon May 06, 2019 8:24 pm
Forum: Civil Aviation
Topic: Updated: Aeroflot 1492 SSJ100 fire at Moscow (SVO) - 40+ confirmed dead
Replies: 832
Views: 157238

Re: Updated: Aeroflot 1492 SSJ100 fire at Moscow (SVO) - 40+ confirmed dead

The pilots had serious control problems on landing. High speed, bounce, then the nose went down and just before the plane touched down hard the nose was raised rather steeply to avoid a nosewheel first landing (overreaction?), causing the airplane to hit the runway with the center of gravity furthe...

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by hivue
Tue Apr 30, 2019 7:46 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 416268

Re: Boeing 737MAX Grounded Worldwide Q2 2019

deltacto wrote:
And THANK YOU for creating this new thread !
At 125 pages, the old one was way too big !


Right. All the repetitious posts in the original thread were starting to look, well, real repetitious. Now all the repetitious posts will look new. :duck:

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by hivue
Mon Apr 29, 2019 6:11 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Interested wrote:
The whole driving force for the crash was MCAS


This remains to be determined. To recycle a type of post seen often on anet in response to simple, universal conclusions like this: OK, you can shut down the investigation. We can all go home now. It's been figured out.

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by hivue
Mon Apr 29, 2019 3:42 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

XRAYretired wrote:
he Southwest notice has confused the issue. It mixes references to STS and MCAS so it no longer adequately reflects the previously published MCAS fix description.

I hope the pilots can understand it.


Ray


I believe that MCAS is implemented as an extension of STS.

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by hivue
Fri Apr 26, 2019 4:41 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

That is a better way to say it as there is a chance that a pilot could screw it up and although loss of life would be small as no passengers - it would be an expensive way to find out a pilot is lacking basic skills. The same argument applies to small GA airplanes, but stalls are done in them for t...

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by hivue
Fri Apr 26, 2019 3:45 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Unstalling a 737 is essentially the same as an Basic Trainer. It is not difficult and no pilot should ever forget. Commercial Pilots don't practice stall recovery as I believe in practice check rides aren't done in actual planes. I would seriously question a lot of this, although I stand to be corr...

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by hivue
Thu Apr 25, 2019 8:26 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

If MCAS is indeed fixed to behave, then pilots may safely ignore its existence as the only case where MCAS would encounter is when it is helping pilot, and pilot doesn't even have to know that. I'm getting a feeling of deja vu all over again. This almost certainly is the logic Boeing engineers used...

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by hivue
Wed Apr 24, 2019 5:54 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

They are eerily similar to QF72/71 where HAL tried to kill everyone on the flight but the crew(s) applied the proper procedures and saved both flights. BTW the Pilot on QF72 was a formal US Naval Aviator and had attended top gun... Both flights could have turned out a lot different with not well tr...

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by hivue
Wed Apr 24, 2019 1:43 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

BTW both Lionair and ET had no trouble counteracting MCAS initially - they just failed to continue to do so and did not follow the right procedures after the initial counteractions. Well, it's not like they didn't have other things to do. One of the main factors in both crashes may tun out to be th...

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by hivue
Mon Apr 22, 2019 10:56 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

LOL. Are you listening to yourself? It is like saying that collision avoidance system on my Subaru (that brakes automatically if I'm heading for an obstacle) is not really a collision avoidance system because I still can make a collision while driving this vehicle. Even when the system is activated...

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by hivue
Sun Apr 21, 2019 11:21 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Allow me to clarify. The MAX has a natural (inherent) tendency to pitch up at a higher AoA than other transport class aircraft, including its immediate predecessor due to design aspects specific to the MAX during normal operation. This further increases the likelihood of a stall. MCAS was designed ...

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by hivue
Fri Apr 19, 2019 8:28 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

No, they would have still got a fuel efficient new aircraft with probably >95% commonality, but just a little additional training on where Max differs from NG if MCAS was excluded If MCAS had been excluded and not replaced by some other strategy the airplane would not have met certification require...

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by hivue
Fri Apr 19, 2019 6:03 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Rather than an MCAS that appears to this aviation fan as a kludge, would FAA (and other agencies) have objected to just a warning device to the FOs that the plane was approaching that particular condition. Yes. MCAS was implemented to meet a certification requirement for increasing control column f...

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by hivue
Fri Apr 19, 2019 6:00 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Interested wrote:
are they serious and can they bring a plane down.


The fact that many/most airliners have similar switches prominently placed close to hand should answer that question for you.

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by hivue
Fri Apr 19, 2019 3:44 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

SomebodyInTLS wrote:
the intention of the system is to prevent the pilot initiating stall - *for certification purposes*.


But MCAS 1.0 can't do that. Nobody intended for it to be able to do that. MCAS 2.0 will not be able to do that. Nobody intends for it to be able to do that.

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by hivue
Fri Apr 19, 2019 4:08 am
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

There is no chance somebody said "the pilots are not going to know what to do so they'll end up crashing but we can't have a training requirement so it sucks to be on that flight." Agreed -- but I'm not so sure no Boeing engineer said, "I think the pilots are not going to know what t...

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by hivue
Thu Apr 18, 2019 7:47 pm
Forum: Civil Aviation
Topic: AA300 JFK-LAX Hits object on takeoff!
Replies: 209
Views: 75560

Re: AA300 JFK-LAX Hits object on takeoff!

Does anyone know how to look up the aircraft that departed immediately prior to this flight? My industry friend says it was an A380 but I'd like to confirm the info. Wake turbulence can cause a severe rolling moment where your flight controls may not have the authority to overcome, this may explain...

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by hivue
Tue Apr 16, 2019 8:02 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

Neither Ethiopian nor LionAir were not close in stall conditions and yet MCAS activated; This is getting a little weird -- like two ships passing in thick fog. Some posters keep insisting that MCAS is an anti-stall system. Others simultaneously are waving their arms wondering where in the "ave...

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by hivue
Tue Apr 16, 2019 3:51 pm
Forum: Civil Aviation
Topic: Ethiopian Airlines 737MAX crashes enroute to Nairobi Q1 2019
Replies: 5479
Views: 748984

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

widespread normalization of deviance @zeke I have cherry picked a short phrase from your very interesting post and am not trying represent any of this as your opinion (and I'm not trying to hijack this thread). I have seen a lot of cockpit videos on youtube and I often wonder if all that profession...

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by hivue
Mon Apr 15, 2019 9:58 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6476
Views: 752551

Re: B737MAX Grounded Worldwide

[*]

ArgentoSystems wrote:
I did not find any misinformation.


You would find no misinformation in an empty book either.

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