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https://edition.cnn.com/2019/06/26/politics/boeing-737-max-flaw/index.html
New flaw discovered on Boeing 737 Max, sources say
By Shimon Prokupecz, Drew Griffin and Gregory Wallace, CNN
Updated 0014 GMT (0814 HKT) June 27, 2019
(CNN)A new flaw has been discovered in the computer system for the Boeing 737 Max that could push the plane downward, according to two sources familiar with the testing, an issue that is expected to further delay the aircraft's return to service.
A series of simulator flights to test new software developed by Boeing revealed the flaw, according to one of the sources.
737 Max pilot sues Boeing for career damage, 'severe emotional and mental stress'
The latest versions of Boeing's popular jet were grounded in March after two crashes -- Lion Air flight 610 and Ethiopian Airlines flight 302 -- that killed 346 people.
While the crashes remain under investigation, preliminary reports showed that a new stabilization system pushed both planes into steep nosedives from which the pilots could not recover. The issue is known in aviation vernacular as runaway stabilizer trim.
Boeing announced it could break the chain of events that led to both crashes by developing a software fix that would limit the potency of that stabilization system.
In simulator tests, government pilots discovered that a microprocessor failure could push the nose of the plane toward the ground. It is not known whether the microprocessor played a role in either crash.
When testing the potential failure of the microprocessor in the simulators, "it was difficult for the test pilots to recover in a matter of seconds," one of the sources said. "And if you can't recover in a matter of seconds, that's an unreasonable risk."
This is the flight simulator and manual used to train pilots of doomed Ethiopian Airlines flight
Boeing engineers are now trying to address the issue, which has led to another delay in recertifying the 737 Max.
"The safety of our airplanes is Boeing's highest priority," the company said in a statement.
Boeing said that the Federal Aviation Administration "identified an additional requirement that it has asked the company to address through the software changes that the company has been developing for the past eight months."
"Boeing agrees with the FAA's decision and request, and is working on the required software," the company said, adding that "Boeing will not offer the 737 MAX for certification by the FAA until we have satisfied all requirements for certification of the MAX and its safe return to service."
The sources say Boeing engineers are trying to determine if the microprocessor issue can be fixed by reprogramming software or if replacing the physical microprocessors on each 737 Max aircraft may be required.
Pilot training also undergoing update
In preparation for the airplane's return to service, Boeing and the FAA are also working out details of additional training for 737 MAX pilots, which could include additional simulator time, the sources said.
Boeing and the FAA are working with the European, Brazilian and Canadian civil aviation authorities.
Boeing has proposed computer-based training which could be completed quickly and on an iPad. Pilots unions, as well as "Miracle on the Hudson" hero Chelsey Sullenberger, have said such training cannot be adequately experienced on an iPad.
The FAA is still actively considering whether more time consuming and expensive simulator training will be required, according to both sources.
Gregory Martin, an FAA spokesman, said Wednesday the regulator "is following a thorough process, not a prescribed timeline, for returning the Boeing 737 Max to passenger service."
"The FAA will lift the aircraft's prohibition order when we deem it is safe to do so," the spokesman said. "We continue to evaluate Boeing's software modification and we are still developing necessary training requirements."
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波音737MAX测试期间又出新问题 复飞计划恐再度推迟
2019-06-27 07:42
中新网6月27日电 综合报道，美国联邦航空管理局(FAA)26日表示，该机构在波音737 MAX系列飞机上发现新的“潜在风险因素”，该风险可能导致飞机向下俯冲。FAA告诉波音公司，必须在解决新风险后，才能批准737 MAX复飞。
【737 MAX飞机复飞计划恐推迟】
报道称，知情人士透露，FAA上周在模拟器测试中发现了新的风险。新问题意味着波音公司最早不会在7月8日前进行认证试飞。消息人士还说，FAA将至少花两至三周时间审查结果，然后再决定是否让飞机重新投入使用。
资料图：波音737 MAX 8。
FAA代表表示，该机构非常认真地对待检查737 MAX新软件的过程。他强调称，尚未确定波音737 MAX复飞期限，当该机构认为其安全时，就会取消737 MAX飞机的飞行禁令。
5月，FAA的代表告诉航空业的成员，最早可能会在6月底批准737 MAX系列飞机复飞。6月9日，美国航空公司曾宣布，波音737 MAX继续停飞，取消该机型的航班时刻将延长至今年9月3日。
【波音：以安全方式修复飞机问题】
当被问及有关新的潜在风险时，波音公司称其“正在与FAA密切合作，以安全的方式进行MAX系列飞机的修复工作”。
波音737 Max客机去年10月和今年3月接连发生两起空难，造成346人丧生。之后，波音公司一直在致力于升级一款名为MCAS的防失速系统，该系统也被认为是酿成上述两起事故的主要原因。
路透社援引两位知情此事的人话称，上周在模拟器测试期间，一名FAA试飞员激活测试MCAS失速预防系统，在一次激活实验期间，飞行员发现需要一段时间来恢复用于控制飞机稳定器的系统。
目前尚不清楚这种情况是否可以通过软件更新来解决，或者是否有其他办法，但波音对FAA表示，他们认为可以通过软件升级的方式解决问题。如果需要修复硬件问题，则可能会增加飞机维修的时间，从而延长停飞的计划。返回搜狐，查看更多
https://www.slashgear.com/another-boeing-737-max-flaw-tipped-to-delay-upcoming-test-flight-26581888/
Another Boeing 737 MAX flaw tipped to delay upcoming test flight
Brittany A. Roston - Jun 26, 2019, 4:48 pm CDT
0
The Federal Aviation Administration has identified another alleged risk with Boeing’s grounded 737 MAX aircraft, a new report claims. This alleged additional risk will need to be fixed before the company can conduct a certification test flight, the sources claim, ensuring there aren’t any future tragedies associated with the jets. Assuming the leak is correct, the test flight won’t happen until July 8 at the earliest.
READ: Boeing 737 MAX MCAS updated to prevent future crashes
The information comes from Reuters, which claims the FAA discovered a second flaw with the Boeing 737 Max during a simulator test conducted last week. The claim comes from unnamed sources — neither the FAA or Boeing have commented on the leak at this time.
Because of the alleged new risk, Boeing’s certification test flight will be delayed until July 8 at the earliest, the leak claims. In contrast, the last official word from the FAA was that Boeing’s jets may get approval by late June.
The Boeing 737 MAX jets were grounded globally following the latter of two deadly crashes related to the aircraft’s MCAS stall-prevention system. The first crash, which happened in Indonesia in October, may have been the result of software that kept pushing the plane’s nose down.
The new alleged risk, the report claims, was discovered by an FAA test pilot as part of a simulator test. That simulation reportedly ran scenarios that could activate the MCAS system, one of which is claimed to have resulted in the plane taking a longer time to recover the jet’s stabilizer trim system.
https://www.nytimes.com/2019/06/26/business/boeing-737-max-faa-test.html
Boeing’s 737 Max Suffers Setback in Flight Simulator Test
A 737 Max at the airport near Boeing’s plant in Washington State. Nearly 500 of Boeing’s Max jets remain grounded across the globe.CreditRuth Fremson/The New York Times
Ima
A 737 Max at the airport near Boeing’s plant in Washington State. Nearly 500 of Boeing’s Max jets remain grounded across the globe.CreditCreditRuth Fremson/The New York Times
By Natalie Kitroeff and Tiffany Hsu
In a flight simulator last week, F.A.A. pilots tested erroneous activations of anti-stall software that pushes down the nose of the Max, two people with knowledge of the matter said. The software, known as MCAS, was involved in two crashes that killed 346 people.
In at least one instance, an F.A.A. pilot was unable to quickly and easily follow Boeing’s emergency procedures to regain control of the plane. The pilot rated that failure as catastrophic, meaning it could lead to the loss of an aircraft midflight, the people said. The situation that was tested is highly unlikely to occur during a typical passenger flight, but the regulator is still requiring Boeing to make a fix, one of the people said.
The discovery may erode confidence in Boeing’s assertions, in conversations with regulators, airlines and aviation unions, that well-trained pilots can easily handle a software malfunction based on their understanding of standard emergency procedures.
Subscribe to With Interest
Catch up and prep for the week ahead with this newsletter of the most important business insights, delivered Sundays.
It also adds to the roadblocks that have kept pushing back the Max’s return to flight. Nearly 500 Max jets have remained grounded across the globe since March, as the company faces a barrage of questions from the F.A.A. and international regulators.
In recent weeks, the F.A.A. has been testing a broad array of potential failures involving the anti-stall software, partly to ensure that the fix Boeing has developed does not introduce new problems.
In a statement on Wednesday, Gordon Johndroe, a Boeing spokesman, said the company had been working for eight months to provide a comprehensive update to the software. “The safety of our airplanes is Boeing’s highest priority,” Mr. Johndroe said.
He added, “Boeing will not offer the 737 Max for certification by the F.A.A. until we have satisfied all requirements for certification of the Max and its safe return to service.”
Boeing hopes to have the Max back in the air early in the fall. Several airlines have canceled flights on the plane into early September.
Editors’ Picks
A Year in Paris That Transformed Jacqueline Kennedy Onassis
She’s 103 and Just Ran the 100-Meter Dash. Her Life Advice? ‘Look for Magic Moments’
‘As We Approached My Stop, I Did Something I Hadn’t Anticipated’
During a congressional hearing last week, aviation leaders criticized Boeing’s conduct after the two deadly accidents — a Lion Air flight in Indonesia in October and an Ethiopian Airlines flight in March. They also questioned the design, certification and production of the Max and discussed whether foreign pilots had sufficient training.
New flaw discovered on Boeing 737 Max, sources say
By Shimon Prokupecz, Drew Griffin and Gregory Wallace, CNN
Updated 0014 GMT (0814 HKT) June 27, 2019
(CNN)A new flaw has been discovered in the computer system for the Boeing 737 Max that could push the plane downward, according to two sources familiar with the testing, an issue that is expected to further delay the aircraft's return to service.
A series of simulator flights to test new software developed by Boeing revealed the flaw, according to one of the sources.
737 Max pilot sues Boeing for career damage, 'severe emotional and mental stress'
The latest versions of Boeing's popular jet were grounded in March after two crashes -- Lion Air flight 610 and Ethiopian Airlines flight 302 -- that killed 346 people.
While the crashes remain under investigation, preliminary reports showed that a new stabilization system pushed both planes into steep nosedives from which the pilots could not recover. The issue is known in aviation vernacular as runaway stabilizer trim.
Boeing announced it could break the chain of events that led to both crashes by developing a software fix that would limit the potency of that stabilization system.
In simulator tests, government pilots discovered that a microprocessor failure could push the nose of the plane toward the ground. It is not known whether the microprocessor played a role in either crash.
When testing the potential failure of the microprocessor in the simulators, "it was difficult for the test pilots to recover in a matter of seconds," one of the sources said. "And if you can't recover in a matter of seconds, that's an unreasonable risk."
This is the flight simulator and manual used to train pilots of doomed Ethiopian Airlines flight
Boeing engineers are now trying to address the issue, which has led to another delay in recertifying the 737 Max.
"The safety of our airplanes is Boeing's highest priority," the company said in a statement.
Boeing said that the Federal Aviation Administration "identified an additional requirement that it has asked the company to address through the software changes that the company has been developing for the past eight months."
"Boeing agrees with the FAA's decision and request, and is working on the required software," the company said, adding that "Boeing will not offer the 737 MAX for certification by the FAA until we have satisfied all requirements for certification of the MAX and its safe return to service."
The sources say Boeing engineers are trying to determine if the microprocessor issue can be fixed by reprogramming software or if replacing the physical microprocessors on each 737 Max aircraft may be required.
Pilot training also undergoing update
In preparation for the airplane's return to service, Boeing and the FAA are also working out details of additional training for 737 MAX pilots, which could include additional simulator time, the sources said.
Boeing and the FAA are working with the European, Brazilian and Canadian civil aviation authorities.
Boeing has proposed computer-based training which could be completed quickly and on an iPad. Pilots unions, as well as "Miracle on the Hudson" hero Chelsey Sullenberger, have said such training cannot be adequately experienced on an iPad.
The FAA is still actively considering whether more time consuming and expensive simulator training will be required, according to both sources.
Gregory Martin, an FAA spokesman, said Wednesday the regulator "is following a thorough process, not a prescribed timeline, for returning the Boeing 737 Max to passenger service."
"The FAA will lift the aircraft's prohibition order when we deem it is safe to do so," the spokesman said. "We continue to evaluate Boeing's software modification and we are still developing necessary training requirements."
https://www.sammyboy.com/javascript:void(0);
http://www.sohu.com/a/323245987_123753?spm=smpc.home.top-news3.5.1561595747894lY1gaIi
中国新闻网
77万文章 463亿总阅读
查看TA的文章>
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波音737MAX测试期间又出新问题 复飞计划恐再度推迟
2019-06-27 07:42
中新网6月27日电 综合报道，美国联邦航空管理局(FAA)26日表示，该机构在波音737 MAX系列飞机上发现新的“潜在风险因素”，该风险可能导致飞机向下俯冲。FAA告诉波音公司，必须在解决新风险后，才能批准737 MAX复飞。
【737 MAX飞机复飞计划恐推迟】
报道称，知情人士透露，FAA上周在模拟器测试中发现了新的风险。新问题意味着波音公司最早不会在7月8日前进行认证试飞。消息人士还说，FAA将至少花两至三周时间审查结果，然后再决定是否让飞机重新投入使用。
资料图：波音737 MAX 8。
FAA代表表示，该机构非常认真地对待检查737 MAX新软件的过程。他强调称，尚未确定波音737 MAX复飞期限，当该机构认为其安全时，就会取消737 MAX飞机的飞行禁令。
5月，FAA的代表告诉航空业的成员，最早可能会在6月底批准737 MAX系列飞机复飞。6月9日，美国航空公司曾宣布，波音737 MAX继续停飞，取消该机型的航班时刻将延长至今年9月3日。
【波音：以安全方式修复飞机问题】
当被问及有关新的潜在风险时，波音公司称其“正在与FAA密切合作，以安全的方式进行MAX系列飞机的修复工作”。
波音737 Max客机去年10月和今年3月接连发生两起空难，造成346人丧生。之后，波音公司一直在致力于升级一款名为MCAS的防失速系统，该系统也被认为是酿成上述两起事故的主要原因。
路透社援引两位知情此事的人话称，上周在模拟器测试期间，一名FAA试飞员激活测试MCAS失速预防系统，在一次激活实验期间，飞行员发现需要一段时间来恢复用于控制飞机稳定器的系统。
目前尚不清楚这种情况是否可以通过软件更新来解决，或者是否有其他办法，但波音对FAA表示，他们认为可以通过软件升级的方式解决问题。如果需要修复硬件问题，则可能会增加飞机维修的时间，从而延长停飞的计划。返回搜狐，查看更多
https://www.slashgear.com/another-boeing-737-max-flaw-tipped-to-delay-upcoming-test-flight-26581888/
Another Boeing 737 MAX flaw tipped to delay upcoming test flight
Brittany A. Roston - Jun 26, 2019, 4:48 pm CDT
0
The Federal Aviation Administration has identified another alleged risk with Boeing’s grounded 737 MAX aircraft, a new report claims. This alleged additional risk will need to be fixed before the company can conduct a certification test flight, the sources claim, ensuring there aren’t any future tragedies associated with the jets. Assuming the leak is correct, the test flight won’t happen until July 8 at the earliest.
READ: Boeing 737 MAX MCAS updated to prevent future crashes
The information comes from Reuters, which claims the FAA discovered a second flaw with the Boeing 737 Max during a simulator test conducted last week. The claim comes from unnamed sources — neither the FAA or Boeing have commented on the leak at this time.
Because of the alleged new risk, Boeing’s certification test flight will be delayed until July 8 at the earliest, the leak claims. In contrast, the last official word from the FAA was that Boeing’s jets may get approval by late June.
The Boeing 737 MAX jets were grounded globally following the latter of two deadly crashes related to the aircraft’s MCAS stall-prevention system. The first crash, which happened in Indonesia in October, may have been the result of software that kept pushing the plane’s nose down.
The new alleged risk, the report claims, was discovered by an FAA test pilot as part of a simulator test. That simulation reportedly ran scenarios that could activate the MCAS system, one of which is claimed to have resulted in the plane taking a longer time to recover the jet’s stabilizer trim system.
https://www.nytimes.com/2019/06/26/business/boeing-737-max-faa-test.html
Boeing’s 737 Max Suffers Setback in Flight Simulator Test
A 737 Max at the airport near Boeing’s plant in Washington State. Nearly 500 of Boeing’s Max jets remain grounded across the globe.CreditRuth Fremson/The New York Times
Ima
A 737 Max at the airport near Boeing’s plant in Washington State. Nearly 500 of Boeing’s Max jets remain grounded across the globe.CreditCreditRuth Fremson/The New York Times
By Natalie Kitroeff and Tiffany Hsu
- June 26, 2019
In a flight simulator last week, F.A.A. pilots tested erroneous activations of anti-stall software that pushes down the nose of the Max, two people with knowledge of the matter said. The software, known as MCAS, was involved in two crashes that killed 346 people.
In at least one instance, an F.A.A. pilot was unable to quickly and easily follow Boeing’s emergency procedures to regain control of the plane. The pilot rated that failure as catastrophic, meaning it could lead to the loss of an aircraft midflight, the people said. The situation that was tested is highly unlikely to occur during a typical passenger flight, but the regulator is still requiring Boeing to make a fix, one of the people said.
The discovery may erode confidence in Boeing’s assertions, in conversations with regulators, airlines and aviation unions, that well-trained pilots can easily handle a software malfunction based on their understanding of standard emergency procedures.
Subscribe to With Interest
Catch up and prep for the week ahead with this newsletter of the most important business insights, delivered Sundays.
It also adds to the roadblocks that have kept pushing back the Max’s return to flight. Nearly 500 Max jets have remained grounded across the globe since March, as the company faces a barrage of questions from the F.A.A. and international regulators.
In recent weeks, the F.A.A. has been testing a broad array of potential failures involving the anti-stall software, partly to ensure that the fix Boeing has developed does not introduce new problems.
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In a statement on Wednesday, Gordon Johndroe, a Boeing spokesman, said the company had been working for eight months to provide a comprehensive update to the software. “The safety of our airplanes is Boeing’s highest priority,” Mr. Johndroe said.
He added, “Boeing will not offer the 737 Max for certification by the F.A.A. until we have satisfied all requirements for certification of the Max and its safe return to service.”
Boeing hopes to have the Max back in the air early in the fall. Several airlines have canceled flights on the plane into early September.
Editors’ Picks
A Year in Paris That Transformed Jacqueline Kennedy Onassis
She’s 103 and Just Ran the 100-Meter Dash. Her Life Advice? ‘Look for Magic Moments’
‘As We Approached My Stop, I Did Something I Hadn’t Anticipated’
During a congressional hearing last week, aviation leaders criticized Boeing’s conduct after the two deadly accidents — a Lion Air flight in Indonesia in October and an Ethiopian Airlines flight in March. They also questioned the design, certification and production of the Max and discussed whether foreign pilots had sufficient training.
