(ANSA) - WASHINGTON, 31 MAR - Tragedia sfiorata nei cieli di San Francisco dove un Boeing 777 della United non e' per poco entrato in collisione con un monomotore. I due velivoli sono arrivati ad una distanza compresa tra i 90 e i 60 metri l'uno dall'altro. Lo ha reso noto il National Transportation Safety Bureau (NTSB), l'organismo aereo che si occupa della sicurezza nei trasporti, che ha aperto un'inchiesta. Subito sul boeing e' scattato l'allarme anti-collisione.
San Francisco, evitata collisione aerea
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Small plane, jet too close for comfort near SFO
Henry K. Lee, Chronicle Staff Writer
Wednesday, March 31, 2010Print E-mail Share Comments Font | Size:
(03-30) 19:01 PDT SAN FRANCISCO -- An air traffic controller allowed a small plane to come dangerously close to a commercial jetliner taking off from San Francisco International Airport over the weekend, federal officials said Tuesday.
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The United Airlines Boeing 777 with 251 passengers and 17 crew members, bound for Beijing, left SFO at 11:15 a.m. Saturday and had just been cleared to climb to 3,000 feet when the near-collision happened, the National Transportation Safety Board said.
Shortly after United Flight 889 took off, an air traffic controller warned the pilot of a single-engine Cessna 182 to "maintain visual separation" from the larger plane - which was climbing at 500 feet - and to "pass behind that aircraft," according to a recording of the incident at liveatc.net.
The Cessna pilot confirmed that the United jet "is in sight" and that the smaller plane would "pass behind him."
But moments later, as the jet reached 1,500 feet, its automated traffic collision avoidance system issued an audible warning of, "Traffic traffic."
That's when the pilot and first officer saw the Cessna making a hard left turn to the right of the airliner, the safety board said.
The first officer promptly leveled off the jet, and both crew members watched as the Cessna passed 1,500 feet to the side and 200 to 300 feet overhead, officials said.
The jet continued to China without further incident, but not before one of the United pilots, her voice clearly shaken, told the air traffic controller, "OK, that set off the (the collision avoidance system). We need to talk," according to the recording.
"Roger," the controller replied.
The Federal Aviation Administration generally keeps planes separated by at least 500 feet vertically and 1 1/2 miles horizontally in the airspace around major airports, said agency spokesman Ian Gregor.
The two planes were 600 feet apart vertically but less than six-tenths of a mile apart horizontally when the controller first contacted the pilots, officials said. Gregor said the unidentified controller, who is still working, should have noticed earlier that the small plane was too close to the jet.
"The FAA is investigating this incident and is taking strong measures to make sure something similar does not occur in the future," Gregor said.
The Cessna, built in 1985, is owned by Larry Dale Jackson of San Francisco, records show. Jackson could not be reached for comment.
Non ho tempo di cercare ma le registrazioni dovrebbero essere qui : www.liveatc.net
E-mail Henry K. Lee at hlee@sfchronicle.com.
Small plane, jet too close for comfort near SFO
Henry K. Lee, Chronicle Staff Writer
Wednesday, March 31, 2010Print E-mail Share Comments Font | Size:
(03-30) 19:01 PDT SAN FRANCISCO -- An air traffic controller allowed a small plane to come dangerously close to a commercial jetliner taking off from San Francisco International Airport over the weekend, federal officials said Tuesday.
Video
View Larger Size
More Bay Area News
Probe of PG&E SmartMeters to begin soon 03.31.10
State lawmakers' pay tops in U.S., study shows 03.31.10
What's open, closed on Cesar Chavez Day 03.31.10
The United Airlines Boeing 777 with 251 passengers and 17 crew members, bound for Beijing, left SFO at 11:15 a.m. Saturday and had just been cleared to climb to 3,000 feet when the near-collision happened, the National Transportation Safety Board said.
Shortly after United Flight 889 took off, an air traffic controller warned the pilot of a single-engine Cessna 182 to "maintain visual separation" from the larger plane - which was climbing at 500 feet - and to "pass behind that aircraft," according to a recording of the incident at liveatc.net.
The Cessna pilot confirmed that the United jet "is in sight" and that the smaller plane would "pass behind him."
But moments later, as the jet reached 1,500 feet, its automated traffic collision avoidance system issued an audible warning of, "Traffic traffic."
That's when the pilot and first officer saw the Cessna making a hard left turn to the right of the airliner, the safety board said.
The first officer promptly leveled off the jet, and both crew members watched as the Cessna passed 1,500 feet to the side and 200 to 300 feet overhead, officials said.
The jet continued to China without further incident, but not before one of the United pilots, her voice clearly shaken, told the air traffic controller, "OK, that set off the (the collision avoidance system). We need to talk," according to the recording.
"Roger," the controller replied.
The Federal Aviation Administration generally keeps planes separated by at least 500 feet vertically and 1 1/2 miles horizontally in the airspace around major airports, said agency spokesman Ian Gregor.
The two planes were 600 feet apart vertically but less than six-tenths of a mile apart horizontally when the controller first contacted the pilots, officials said. Gregor said the unidentified controller, who is still working, should have noticed earlier that the small plane was too close to the jet.
"The FAA is investigating this incident and is taking strong measures to make sure something similar does not occur in the future," Gregor said.
The Cessna, built in 1985, is owned by Larry Dale Jackson of San Francisco, records show. Jackson could not be reached for comment.
Non ho tempo di cercare ma le registrazioni dovrebbero essere qui : www.liveatc.net
E-mail Henry K. Lee at hlee@sfchronicle.com.
Mi ricorda l' incidente di tipo 30 anni fa quando, mi pare proprio in California, un 727 entrò in collisione con un Cessna
Inanzitutto non erano 60/90 metri, ma un po' di più...
E poi bisogna vedere che classificazione ha lo spazio aereo di SFO...
Fosse B o C è evidente la pirlata del controllore, fosse D al massimo si può parlare di leggerezza, ma la responsabilità ricadrebbe più sul pilota del Cessna...
Dal forum di LiveATC.net si può scaricare la registrazione delle comunicazioni. Breve estratto:
United: "Ok, that set off the TCAS, that was...er...we need to talk"
ATC: "Roger"
United: "Ok, that set off the TCAS, that was...er...we need to talk"
ATC: "Roger"
Osservando la cartina VFR della TMA su questo fantastico sito
http://www.runwayfinder.com/?loc=SFO
direi che lo spazio aereo attorno a SFO è di classe B.
Poi il fatto che il controllore istruisca il cessna a mantenere own separation e to pass behind fa capire che i due aeroplani dovevano essere separati e non soltanto informati.
Il resto è da vedere, così a naso sembra più un errore del pilota del cessna però bisogna essere lì per capire...
http://www.runwayfinder.com/?loc=SFO
direi che lo spazio aereo attorno a SFO è di classe B.
Poi il fatto che il controllore istruisca il cessna a mantenere own separation e to pass behind fa capire che i due aeroplani dovevano essere separati e non soltanto informati.
Il resto è da vedere, così a naso sembra più un errore del pilota del cessna però bisogna essere lì per capire...
Proprio a quello stavo pensando! Era a San Diego, il 727 veniva da Los Angeles o San Francisco, non me lo ricordo di preciso. Fu un errore dell'ATC, se non sbaglio, a causare l'incidente.
Fatevi due risate con questo video. http://www.youtube.com/watch?v=tNVOS1HB7OA
I sottotitoli che hanno messo alle registrazioni ATC sono allucinanti. Pregevole la trascrizione di questo passaggio: "70E maintain zero separation".
Ho provato a trascrivere meglio: http://www.youtube.com/watch?v=COVQoQojQ38
I sottotitoli che hanno messo alle registrazioni ATC sono allucinanti. Pregevole la trascrizione di questo passaggio: "70E maintain zero separation".
Ho provato a trascrivere meglio: http://www.youtube.com/watch?v=COVQoQojQ38