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-   -   Boeing Resisted Pilots Calls for Steps On MAX (https://www.pprune.org/rumours-news/621524-boeing-resisted-pilots-calls-steps-max.html)

ImbracableCrunk 14th May 2019 21:54

Boeing Resisted Pilots Calls for Steps On MAX
 
“The worst thing that can ever happen is a tragedy like [Lion Air], and the even worse thing would be another one.” - Mike Sinnett, Boeing VP.

https://www.nytimes.com/2019/05/14/b...ane-crash.html

Australopithecus 14th May 2019 22:02

I was wondering who was going to be the fall guy. The federal grand jury has subpoenaed American and Southwest communications with Boeing over this issue.

GlobalNav 15th May 2019 00:11

These accidents and the design features that led to them are looking like the tip of the proverbial iceberg. The corporate (executive/management) cultures of the manufacturer and the regulator(s) are what really need to be corrected.

Jet Jockey A4 15th May 2019 00:16

WOW, just WOW!

Bend alot 15th May 2019 00:37


Originally Posted by Australopithecus (Post 10471396)
I was wondering who was going to be the fall guy. The federal grand jury has subpoenaed American and Southwest communications with Boeing over this issue.

Could be some nasty stuff there - Who was the first to mention no more than an hour!
And the back ground of - $1,000,000 per aircraft, if extra training is required.

my salami 15th May 2019 02:06

[QUOTE=ImbracableCrunk;10471393]“The worst thing that can ever happen is a tragedy like [Lion Air], and the even worse thing would be another one.” - Mike Sinnett, Boeing VP.

I don’t see a bright future for Mr. Sinnett...

MS

Zeffy 15th May 2019 03:01

WSJ
 
https://www.wsj.com/articles/faa-saw...sk-11557831723


...Boeing’s description of MCAS came up in talks with pilot unions after the first MAX crash in October in Indonesia. In contrast to the company’s early stance that the system wasn’t deemed critical for safety, Boeing executive Mike Sinnett described it as “flight-critical software” in explaining to American Airlines pilots why a software fix shouldn’t be rushed, according to the group’s president, Capt. Dan Carey, who reviewed a recording he made of the November meeting.
A Boeing spokesman said Mr. Sinnett disagreed with Mr. Carey’s characterization.

fgrieu 15th May 2019 05:08

From that NYT article (emphasis mine):

(..) Mr. Sinnett and Mr. Bomben, explained that the company did not believe that pilots needed to know about the software, because they were already trained to deal with scenarios like the one on the doomed Lion Air flight. All pilots are expected to know how to take control of an aircraft when the plane’s tail begins moving in an uncontrolled way because of a malfunction, nudging the aircraft toward the ground.

“The assumption is that the flight crews have been trained,” Mr. Sinnett said in the meeting. He added later: “Rightly or wrongly, that was the design criteria and that’s how the airplane was certified with the system and pilot working together.”
Part of him already knew that betting safety on that assumption was dubious!

wonkazoo 15th May 2019 05:30

“We don’t want to rush and do a crappy job of fixing the right things and we also don’t want to fix the wrong things,” Mr. Sinnett said, later adding, “For flight-critical software, I don’t think you want us to rush, rush it faster.”

Ummm, if you want me to go fly that thing and it has an issue with a "flight critical" item, well yes, yes I do want you to rush the fix. And if you fix a few things along the way that do not need fixing well that's OK too. Because if, for God's sake you send me out in an airplane with a critical or fatal flaw in a piece of flight-critical software and it goes south I am going to be very unimpressed. Full Stop.

If accurate that recording is going to cost Boeing billions in damages and may end the MAX program for all time, cast under a cloud of suspicion regarding its certification from within which it cannot escape.

The reason??

Sinnett is tacitly admitting months prior to the ET crash that there is "something" that needs "fixing" on the MAX in a flight critical system. This as a part of his argument that the airplane should keep on flying.

If your jaw didn't hit the floor read it again.

"That left fetzer valve switch?? Well we placarded it against any use with a warning that "Flipping this switch may result in your death" because we weren't sure what it does or how it works. After all, if you really needed it you'd know what it was and why it was there right?? But whatever, if you do accidentally hit that switch just use these other two nifty switches over here to stop the bad behavior. You do that and all will end well."

Uh huh...

Cheers-
dce

Australopithecus 15th May 2019 05:55


Originally Posted by wonkazoo (Post 10471528)
“We don’t want to rush and do a crappy job of fixing the right things and we also don’t want to fix the wrong things,” Mr. Sinnett said, later adding, “For flight-critical software, I don’t think you want us to rush, rush it faster.”

Ummm, if you want me to go fly that thing and it has an issue with a "flight critical" item, well yes, yes I do want you to rush the fix. And if you fix a few things along the way that do not need fixing well that's OK too. Because if, for God's sake you send me out in an airplane with a critical or fatal flaw in a piece of flight-critical software and it goes south I am going to be very unimpressed. Full Stop.

If accurate that recording is going to cost Boeing billions in damages and may end the MAX program for all time, cast under a cloud of suspicion regarding its certification from within which it cannot escape.

The reason??

Sinnett is tacitly admitting months prior to the ET crash that there is "something" that needs "fixing" on the MAX in a flight critical system. This as a part of his argument that the airplane should keep on flying.

If your jaw didn't hit the floor read it again.

"That left fetzer valve switch?? Well we placarded it against any use with a warning that "Flipping this switch may result in your death" because we weren't sure what it does or how it works. After all, if you really needed it you'd know what it was and why it was there right?? But whatever, if you do accidentally hit that switch just use these other two nifty switches over here to stop the bad behavior. You do that and all will end well."

Uh huh...

Cheers-
dce

Fetzer Valve? I still keep 3-in-1 oil for that.

But yeah. The narrative has always had some gaping holes in it, now just a lot more...gaping.

Bend alot 15th May 2019 06:30

https://www.c-span.org/video/?460584...ify-boeing-737

I watched one of the other hearings - could be interesting in a few hours.

pilotmike 15th May 2019 06:46


Originally Posted by ImbracableCrunk (Post 10471393)
“The worst thing that can ever happen is a tragedy like [Lion Air], and the even worse thing would be another one.” - Mike Sinnett, Boeing VP.

https://www.nytimes.com/2019/05/14/b...ane-crash.html

Quoting the article directly, Mr Sinnett is quoted as being in total agreement that MCAS was the sole cause of both crashes, and that nobody concludes otherwise:


]“No one has yet to conclude that the sole cause of this was this function on the airplane,” Mr. Sinnett said, according to a recording of the Nov. 27 meeting reviewed by The New York Times.

Chesty Morgan 15th May 2019 07:45


Originally Posted by Jet Jockey A4 (Post 10471447)
WOW, just WOW!

I know! People are STILL calling it an anti stall system :rolleyes:

derjodel 15th May 2019 08:01


Originally Posted by Chesty Morgan (Post 10471618)
I know! People are STILL calling it an anti stall system :rolleyes:

While you are correct, it is basically impossible to exceed AoA in a Max, isn't it? E.g. AF447 could not have happened with a MCAS system operating (assuming it isn't switched off below certain IAS, as stall warning in Airbus is).

Australopithecus 15th May 2019 08:19


Originally Posted by derjodel (Post 10471635)
While you are correct, it is basically impossible to exceed AoA in a Max, isn't it? E.g. AF447 could not have happened with a MCAS system operating (assuming it isn't switched off below certain IAS, as stall warning in Airbus is).

Note again that the MCAS is there to correct for the light control forces at high angles of attack, not to directly prevent a stall. Even with MCAS version one a deliberate stall entry could (briefly) be possible. As I understand it, MCAS was developed to counter a forward shift in the net centre of pressure, which is kinda like a load shift aft in terms of affecting pitch control forces.


Cows getting bigger 15th May 2019 08:46

The UK RAF had a military Nimrod crash in 2006. One of the outcomes of the crash was Haddon-Cave which was a pretty scathing review of how the UK MoD had approached airworthiness. The review forced a complete change of military airworthiness oversight and regulation.


General malaise
11. The Nimrod Safety Case process was fatally undermined by a general malaise: a widespread assumption by those involved that the Nimrod was ‘safe anyway’ (because it had successfully flown for 30 years) and the task of drawing up the Safety Case became essentially a paperwork and ‘tick- box’ exercise. (Chapter 11)

LowObservable 15th May 2019 12:18

"The Boeing executives, Mr. Sinnett and Mr. Bomben, explained that the company did not believe that pilots needed to know about the software, because they were already trained to deal with scenarios like the one on the doomed Lion Air flight. All pilots are expected to know how to take control of an aircraft when the plane’s tail begins moving in an uncontrolled way because of a malfunction, nudging the aircraft toward the ground."

Where have we read similar statements recently? Just Fancy That, as the Eye would put it.

73qanda 15th May 2019 13:01


All pilots are expected to know how to take control of an aircraft when the plane’s tail begins moving in an uncontrolled way because of a malfunction, nudging the aircraft toward the ground."
Hmmmm, probably shouldn’t have constantly eroded required training standards over the last few decades then.
There is a real problem when non-pilots are rewarded for decreasing the training budgets, they don’t understand how close to the bone they can cut until they’ve hit it.

tucumseh 15th May 2019 13:34


Originally Posted by Cows getting bigger (Post 10471664)
The UK RAF had a military Nimrod crash in 2006. One of the outcomes of the crash was Haddon-Cave which was a pretty scathing review of how the UK MoD had approached airworthiness. The review forced a complete change of military airworthiness oversight and regulation.


And the evidence to Haddon-Cave included reference to Airworthiness Review Team reports by the RAF Director of Flight Safety. That of August 1992, on Chinook, criticised Boeing for not understanding how to act as a Design Authority. Two years later, Chinook ZD576 crashed with a FADEC controlled by Safety Critical Software which had not been certified. Nor did the instructions to aircrew describe adequately its operation.

OldnGrounded 15th May 2019 14:39


Yes, MCAS is not to prevent a stall. It's to prevent a pilot from pulling the nose up too quickly and getting into a too high AOA. Which would cause a stall.
Yup, exactly. I just can't imagine why people think it's an anti-stall system. ;^( And it's just a coincidence that MCAS was intended to meet the requirements of FAR §25.173 "Static longitudinal stability."

Obfuscation by reductio ad absurdum is an excellent skill for folks who want to evade the obvious to develop.




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