Anonymous ID: 941501 March 12, 2019, 4:21 p.m. No.5647875   🗄️.is đź”—kun   >>7885 >>7923 >>8134 >>8150 >>8333 >>8484

>>5647539 /lb

 

sauce from Anons post lb:

 

Boeing to Make Key Change in 737 MAX Cockpit Software

 

Updated March 12, 2019 4:44 p.m. ET

 

Boeing Co. BA -6.15% is making an extensive change to the flight-control system in the 737 MAX aircraft implicated in October’s Lion Air crash in Indonesia, going beyond what many industry officials familiar with the discussions had anticipated.

 

The change was in the works before a second plane of the same make crashed in Africa last weekend—and comes as world-wide unease about the 737 MAX’s safety grows.

 

The change would mark a major shift from how Boeing originally designed a stall-prevention feature in the aircraft, which were first delivered to airlines in 2017.

 

U.S. aviation regulators are expected to mandate the change by the end of April.

 

Boeing publicly released details about the planned 737 MAX software update on its website late Monday. A company spokesman confirmed the update would use multiple sensors, or data feeds, in MAX’s stall-prevention system—instead of the current reliance on a single sensor.

An investigation has been launched after an Ethiopian Airlines Boeing 737 MAX 8 crashed shortly after takeoff on Sunday, killing all on board. WSJ aerospace reporter Robert Wall discusses the possible focus of the investigation, and more. Photo: Getty Images

 

The change was prompted by preliminary results from the Indonesian crash investigation indicating that erroneous data from a single sensor, which measures the angle of the plane’s nose, caused the stall-prevention system to misfire. Then, a series of events put the aircraft into a dangerous dive.

 

Focus on the update has taken on greater urgency as aviation regulators and airlines around the world have grounded their MAX fleets, following the Ethiopian crash over the weekend—despite no links being made between the two crashes by investigators.

 

The MAX software change is expected to take about an hour for each plane, a Boeing spokesman said Tuesday. He declined to offer other details about how the system would weigh the multiple data inputs.

 

“For the past several months and in the aftermath of Lion Air Flight 610, Boeing has been developing a flight control software enhancement for the 737 MAX, designed to make an already safe aircraft even safer,” Boeing said late Monday in a statement.

 

The FAA has decided to allow the 737 MAX to continue flying, a break with counterparts in countries including the U.K., Australia and Singapore, which grounded the model in recent days.

 

The investigation into the Oct. 29 Lion Air crash is continuing, but has focused on the stall-prevention system, apparent maintenance lapses and potential pilot error. Investigators have revealed little about the circumstances leading up to the Ethiopian crash, but have found cockpit voice and data recorders.

 

When the plane was first designed, engineers determined that using a single sensor—measuring what is technically known as the angle of attack—would be simpler and was in line with the plane maker’s long-held philosophy to keep pilots at the center of cockpit control, a person familiar with the matter said.

 

That earlier design of the system, known as MCAS, has puzzled some pilots and safety experts, who wondered why the system didn’t rely on multiple feeds.

 

Mike Michaelis, chairman of the safety committee at American Airlines Group Inc.’s pilot union, welcomed news of the coming Boeing software fix.

 

“That’s the way it should have been in the first place,” he said.

 

Part 1 of 2

 

https://www.wsj.com/articles/boeing-to-make-key-change-in-max-cockpit-software-11552413489

Anonymous ID: 941501 March 12, 2019, 4:21 p.m. No.5647885   🗄️.is đź”—kun   >>7923 >>8150 >>8333 >>8484

>>5647875

 

In the wake of the Lion Air crash, Boeing and the FAA emphasized that an existing procedure allows pilots to disable the MAX stall-prevention system when flying the airplane. U.S. airlines and unions have since expressed confidence in their pilots to safely operate the airplane.

More on the Boeing 737 MAX

 

More Jets Are Idled Across Globe

The Middle Seat: Boeing 737 MAX–The Latest Example of a Passive DOT

The Middle Seat: What You Need to Know About Flying On a 737 MAX

The FAA Has No Current Plans to Ground Boeing’s 737 MAX After Deadly Crash

U.N. Staff, Nigerian Writer Among Victims

Safety Fears Put Boeing on the Defensive

A Boeing Pacesetter, the 737, Confronts Trying Times

 

A software fix to the MCAS flight-control feature by the FAA and Boeing had been expected early in January, but discussions between regulators and the plane maker dragged on, partly over differences of opinion about technical and engineering issues, according to people familiar with the details. Officials from various parts of Boeing and the FAA had differing views about how extensive the fix should be.

 

U.S. officials have said the federal government’s recent shutdown also halted work on the fix for five weeks.

 

The FAA concluded the delay was acceptable because its experts agreed with Boeing that there was no imminent safety threat, according to one person briefed on the discussions. The FAA also determined that steps taken after the Lion Air crash to inform pilots world-wide about the system’s operation were adequate to alleviate hazards.

 

Since the 737 MAX is a derivative of an earlier model, certification rules allowed regulators to give the plane maker credit for the safety record of those earlier planes. And to some extent, government and industry officials have said, government scrutiny of certain systems typically is less intense for derivatives than for brand-new designs.

 

With design work on the original 737 planes dating back some five decades, “there is no other jet in the world that has so many derivatives over such a long period of time,” according to John Cox, an industry consultant and former senior safety official for North America’s largest pilots union.

 

Boeing also told the FAA it had extensive experience with the reliability of the same type of sensors on other models, according to industry officials familiar with the details, and that using multiple sensors to feed the flight-control system would have been more complex.

 

A Boeing spokesman didn’t immediately respond to a request for comment regarding discussions about the fix.

 

The anticipated fix also will limit the extent of the flight-control system’s downward push on the plane’s nose. And it will rely more on technical safeguards than memorized pilot responses if the system misfires. Boeing said the change would come with updates to pilot displays, operation manuals and crew training.

 

Part 2 of 2

 

https://www.wsj.com/articles/boeing-to-make-key-change-in-max-cockpit-software-11552413489

Anonymous ID: 941501 March 12, 2019, 4:37 p.m. No.5648194   🗄️.is đź”—kun   >>8222 >>8333 >>8484

>>5648134

 

Baker looks like moar than 23 times Q has linked to "This video will get Trump elected".

 

re: >5647897 23=PAIN: 23rd time Q has linked to the video "This video will get Trump elected"

 

checked claim via sauce: https://qanon.pub/?q=G2qIXXafxCQ

 

Odd though, bug in qanon.pub? Search shows 23 but I counted 31 manually using ctrl-F

Anonymous ID: 941501 March 12, 2019, 4:44 p.m. No.5648326   🗄️.is đź”—kun   >>8484

>>5647897

 

see here (op), could you ACK/confirm?

 

>>5648134

>looks like moar than 23 times Q has linked to "This video will get Trump elected".

>Odd though, bug in qanon.pub? Search shows 23 but I counted 31 manually using ctrl-F

 

Even stranger, if I count each posts individually (and not each link individually) I get only 20