Mulugeta Ayene / AP
Boeing says it has a software fix for its 737 MAX aircraft, which will be unveiled on Wednesday to officers, pilots and aviation authorities around the world as the aircraft manufacturer works to restore the trust of its customers and the flying public Two deadly crashes of aircraft in recent months.
Meanwhile, these crashes and the relationship between Boeing and its regulatory agency are being discussed on Wednesday in a hearing by the US Senate Subcommittee on Aeronautics. The testimony will be provided by the Heads of the Federal Aviation Administration and the National Transportation Safety Board, as well as the Inspector General of the Transportation Department, who will examine how the FAA has certified the 737 MAX to be airworthy and if the regulators rely too much on Boeing to provide their own safety ratings in their review ,
These developments occur as Ethiopian transport authorities prepare to release preliminary results on the cause of the crash of a Boeing 737 MAX 8 aircraft from Ethiopian Airlines, killing all 157 people aboard. 19659008] A spokesman for the Ethiopian Ministry of Transport told the Associated Press: "No date has been set, but (the preliminary report) will be published later this week." According to the spokesman of the US National Transportation Safety Board, the French aviation investigation authority (BEA) and the Ministry of Transport in Ethiopia, the investigation was conducted jointly.
Investigators said there were striking similarities between the crash on March 10 outside the Ethiopian capital Addis Ababa and the crash of a Lion Air Boeing 737 MAX 8 in October in Indonesia in the Java Sea in Indonesia. Both planes crashed shortly after launch and both followed similar unpredictable airborne footprints indicating that the pilots might have tried not to bring the planes into Nosedives.
The plane crash of Lion Air on 29 October, in which all were killed According to the Indonesian investigators were 189 people on board. An automated flight control system that responded to erroneous data from a faulty sensor repeatedly pushed down the nose of the aircraft. This system, known as MCAS, for maneuvering the augmentation system for features will prevent the aircraft from stalling. But the Lion Air pilots apparently did not know how to counter or shut down the system, and were in a vain battle to regain control of the plane.
After the Lion Air crash, many pilots complained that they had not been made aware of the MCAS system, as it did not exist in previous versions of the 737, and had not been trained on what to do when the system engages and the nose of the aircraft unexpectedly presses down.
It's still not clear if something similar happened Airplane Ethiopian Airlines took place, but the company's CEO said pilots had been trained on the new system after the crash of Lion Air.
According to official Boeing employees, the company has completed the development of software upgrades for MCAS to prevent such incidents in the US future. The system will no longer force the nose of the aircraft repeatedly, but only once, when it detects the aircraft entering an aerodynamic standstill. And the MCAS system relies on data from the two angle of attack sensors in the plane rather than just one.
Also, a warning light that alerts the pilot when the pitch sensors do not match becomes a more expensive option for airlines to buy the aircraft and is added to the entire fleet of 737 MAX aircraft for free.
A Boeing official says the software upgrades have undergone extensive laboratory and simulator testing, with the pilots in a simulator in front of an airplane faced with a series of errors and errors, including sensor errors and other erroneous inputs.
The Boeing official says the FAA participated in the evaluation and even demonstrated the software upgrades during a test flight on March 12th.
It is unlikely that the FAA will respond quickly in the certification of software upgrades and other fixes, especially considering the review of the certification process that comes from Congress and others. Regulators in Canada, Europe, China and other countries say that they will no longer rely on FAA data and will conduct their own MCAS software update testing before returning the Boeing 737 MAX aircraft to the MCA Let air. Some experts say it may take months for the aircraft to be put back into service.