ZHUHAI, CHINA/WASHINGTON: Boeing Co said on Wednesday it had issued a safety bulletin reminding pilots how you can care for erroneous data from a key sensor within the wake of last week's Indonesian jetliner crash.
The US planemaker said investigators probing the Lion Air crash off the coast of Indonesia, by which all 189 on board have been killed, had found that one of the vital "angle of attack" sensors at the brand-new Boeing 737 MAX jet had equipped erroneous data.
Experts say the angle of assault is a a very powerful parameter that is helping the airplane's computers understand whether its nostril is simply too prime relative to the current of air - a phenomenon that may throw the plane into an aerodynamic stall and make it fall.
Some modern airplane have techniques designed to proper the posture of the airplane robotically to keep flying safely.
There are also procedures for pilots to practice within the tournament of lacking data from damaged sensors at the fuselage, however it remains unclear how a lot time the team of flight JT610 had to reply at the fairly low altitude of round 5,000 ft.
An perspective of assault sensor were modified through mechanics at the flooring in Bali the day earlier than the crash, Indonesia's National Transportation Safety Committee (KNKT) said.
The captain and first officer flying from Bali to Jakarta the evening earlier than the crash had indicators displaying variations in perspective of 20 levels, KNKT said, but that flight landed safely in spite of the problems within the air.
COCKPIT PROCEDURE
Boeing said in a commentary gained at China's largest air display in Zhuhai that its word to airlines underscored "existing flight crew procedures" designed to deal with circumstances the place data entering the cockpit from the sensors used to be wrong.
The Boeing 737 MAX has three such blade-shaped sensors. Erroneous readings can in some circumstances motive the 737 MAX to indicate the nostril down sharply to keep air underneath the wings and keep away from a stall, according to a person briefed at the matter.
A source said on situation of anonymity that the Boeing bulletin related best to the 737 MAX, of which there are just over 200 in service.
Service announcements can also be followed through obligatory airworthiness directives through the U.S. Federal Aviation Administration.
Boeing has delivered 219 737 MAX jets to customers globally, with four,564 orders for jets yet to be delivered.
The Boeing 737 MAX is a extra fuel-efficient version of the manufacturer's best-selling single-aisle 737 series.
The Lion Air crash used to be the first involving the brand new version, which airlines introduced into service last yr.
Indonesian authorities have downloaded data from the flight data recorder that showed a cockpit indicator at the Lion Air jet used to be damaged for its last 4 flights.
A seek for the cockpit voice recorder, the second one so-called "black box", remains underway.
KNKT said it might attempt to reconstruct the jet's last flight using Boeing simulators in Seattle. The perspective of assault sensor replaced in Bali can be analysed at its position of manufacture in Chicago, the coincidence investigator said.
The US planemaker said investigators probing the Lion Air crash off the coast of Indonesia, by which all 189 on board have been killed, had found that one of the vital "angle of attack" sensors at the brand-new Boeing 737 MAX jet had equipped erroneous data.
Experts say the angle of assault is a a very powerful parameter that is helping the airplane's computers understand whether its nostril is simply too prime relative to the current of air - a phenomenon that may throw the plane into an aerodynamic stall and make it fall.
Some modern airplane have techniques designed to proper the posture of the airplane robotically to keep flying safely.
There are also procedures for pilots to practice within the tournament of lacking data from damaged sensors at the fuselage, however it remains unclear how a lot time the team of flight JT610 had to reply at the fairly low altitude of round 5,000 ft.
An perspective of assault sensor were modified through mechanics at the flooring in Bali the day earlier than the crash, Indonesia's National Transportation Safety Committee (KNKT) said.
The captain and first officer flying from Bali to Jakarta the evening earlier than the crash had indicators displaying variations in perspective of 20 levels, KNKT said, but that flight landed safely in spite of the problems within the air.
COCKPIT PROCEDURE
Boeing said in a commentary gained at China's largest air display in Zhuhai that its word to airlines underscored "existing flight crew procedures" designed to deal with circumstances the place data entering the cockpit from the sensors used to be wrong.
The Boeing 737 MAX has three such blade-shaped sensors. Erroneous readings can in some circumstances motive the 737 MAX to indicate the nostril down sharply to keep air underneath the wings and keep away from a stall, according to a person briefed at the matter.
A source said on situation of anonymity that the Boeing bulletin related best to the 737 MAX, of which there are just over 200 in service.
Service announcements can also be followed through obligatory airworthiness directives through the U.S. Federal Aviation Administration.
Boeing has delivered 219 737 MAX jets to customers globally, with four,564 orders for jets yet to be delivered.
The Boeing 737 MAX is a extra fuel-efficient version of the manufacturer's best-selling single-aisle 737 series.
The Lion Air crash used to be the first involving the brand new version, which airlines introduced into service last yr.
Indonesian authorities have downloaded data from the flight data recorder that showed a cockpit indicator at the Lion Air jet used to be damaged for its last 4 flights.
A seek for the cockpit voice recorder, the second one so-called "black box", remains underway.
KNKT said it might attempt to reconstruct the jet's last flight using Boeing simulators in Seattle. The perspective of assault sensor replaced in Bali can be analysed at its position of manufacture in Chicago, the coincidence investigator said.
Boeing issues advice for pilots after Indonesia crash
![Boeing issues advice for pilots after Indonesia crash]()
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November 07, 2018
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