"Boeing 737: Hur världens mest framgångsrika plan blev det mest problemförföljda"
Så har CNN valt att sätta rubriken på en artikel som på ett bra sätt beskriver 737ans historia, från 1960-talet till idag när Boeing som en följd av 737 MAX-debacklet fått problem stora med ekonomin och i snart två år kämpat för att övertyga kontrollmyndigheter som FAA och EASA om att planet går att få säkert.
Artikeln publicerades idag, 2020-12-25.
Här är ett par citat från artikeln.
Boeing 737: How world's most successful airplane became its most troubled
«In total, the Next Generation family received over 7,000 orders, helping the 737 to become the first commercial aircraft to surpass 10,000 orders, in 2012.
By then, nearly a third of all commercial flights were operated by a 737, and one would take off or land somewhere in the world every two seconds.
During the rollout of this redesign, Boeing again started work on an all-new replacement for the now aging 737, a project codenamed Y1.
The idea was shelved once again, however, due to the success of yet another partial upgrade and the continued pressure from the fast-selling Airbus A320.»
«The Boeing 737 Max was announced in 2011, the fourth generation of the aircraft.
"Boeing needed to combat what Airbus were doing with the A320neo, a version of the plane with a new engine that was quite substantially more fuel efficient," says Simons.
To do so, however, the company ran into a problem it had encountered before: the new, much bigger engines it wanted for the 737 Max wouldn't fit under the plane's low wings -- an issue Airbus didn't have, because the A320 was already a much taller plane than the 737.
The solution was to add some length to the front landing gear and mount the engines further forward and higher on the wings, giving them the clearance they needed.
But, as Boeing later found out in simulators, this altered the plane's aerodynamics, making it tilt up dangerously in certain situations.
To counter the problem, the company devised a safety system called MCAS, which would immediately push the 737's nose down if it tilted too high.
Because MCAS was designed to make the 737 Max fly just like previous 737s, and because Boeing believed that it would come into action only in extreme flying circumstances, it was kept almost secret.
Boeing decided against including it in the brief lesson that pilots already certified for previous 737s needed to take to fly the 737 Max.
Furthermore, MCAS relied on a single sensor, a heresy in aviation where redundancy is always preferred.
Airlines liked the 737 Max, because it was more economical to operate and didn't require expensive simulator training for their pilots.»
(min rödmarkering)
https://edition.cnn.com/travel/artic...aft/index.html
När det står "found out in simulators" ovan menas troligen "found out in wind tunnel".
Kankse har den här historiebeskrivningen brister, men i stora drag sammanfattar det bakgrunden till varför Boeing började leverera farliga flygplan och hur det ledde till ett långt flygförbud som allvarligt skadat Boeings ekonomi. En skada som betydligt försämrat företagets förmåga att rida ut den storm som nu lagts ovanpå 737 MAX-debacklet, när flygandet minskat med, ofta 80-90%. Som en följd av pandemin.
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Så har CNN valt att sätta rubriken på en artikel som på ett bra sätt beskriver 737ans historia, från 1960-talet till idag när Boeing som en följd av 737 MAX-debacklet fått problem stora med ekonomin och i snart två år kämpat för att övertyga kontrollmyndigheter som FAA och EASA om att planet går att få säkert.
Artikeln publicerades idag, 2020-12-25.
Här är ett par citat från artikeln.
Boeing 737: How world's most successful airplane became its most troubled
«In total, the Next Generation family received over 7,000 orders, helping the 737 to become the first commercial aircraft to surpass 10,000 orders, in 2012.
By then, nearly a third of all commercial flights were operated by a 737, and one would take off or land somewhere in the world every two seconds.
During the rollout of this redesign, Boeing again started work on an all-new replacement for the now aging 737, a project codenamed Y1.
The idea was shelved once again, however, due to the success of yet another partial upgrade and the continued pressure from the fast-selling Airbus A320.»
«The Boeing 737 Max was announced in 2011, the fourth generation of the aircraft.
"Boeing needed to combat what Airbus were doing with the A320neo, a version of the plane with a new engine that was quite substantially more fuel efficient," says Simons.
To do so, however, the company ran into a problem it had encountered before: the new, much bigger engines it wanted for the 737 Max wouldn't fit under the plane's low wings -- an issue Airbus didn't have, because the A320 was already a much taller plane than the 737.
The solution was to add some length to the front landing gear and mount the engines further forward and higher on the wings, giving them the clearance they needed.
But, as Boeing later found out in simulators, this altered the plane's aerodynamics, making it tilt up dangerously in certain situations.
To counter the problem, the company devised a safety system called MCAS, which would immediately push the 737's nose down if it tilted too high.
Because MCAS was designed to make the 737 Max fly just like previous 737s, and because Boeing believed that it would come into action only in extreme flying circumstances, it was kept almost secret.
Boeing decided against including it in the brief lesson that pilots already certified for previous 737s needed to take to fly the 737 Max.
Furthermore, MCAS relied on a single sensor, a heresy in aviation where redundancy is always preferred.
Airlines liked the 737 Max, because it was more economical to operate and didn't require expensive simulator training for their pilots.»
(min rödmarkering)
https://edition.cnn.com/travel/artic...aft/index.html
När det står "found out in simulators" ovan menas troligen "found out in wind tunnel".
Kankse har den här historiebeskrivningen brister, men i stora drag sammanfattar det bakgrunden till varför Boeing började leverera farliga flygplan och hur det ledde till ett långt flygförbud som allvarligt skadat Boeings ekonomi. En skada som betydligt försämrat företagets förmåga att rida ut den storm som nu lagts ovanpå 737 MAX-debacklet, när flygandet minskat med, ofta 80-90%. Som en följd av pandemin.
–