Air traffic control contacted the flight crew and when the captain asked the senior stewardess to inspect the right landing gear area, she was then told of the loss by passengers.
And some nations, notably Brazil and Senegal, which were handling Air France Flight 447, don't yet have modern oceanic air-traffic-control systems.
WSJ: How New Air-Traffic Control Systems Operate Over Oceans
Contact with Flight KQ507 was lost by air traffic control shortly after take-off at 0005 local time (0105 GMT).
So we are beginning today discussions with our unions to likely close more than 100 air traffic control towers at airports with fewer than 150, 000 flight operations per year.
"That guy passed us now and that was not good, " the pilot of American Airlines flight 951 told the controllers at New York Air Traffic Control Center, the country's busiest.
They also received objections from Sport England, who said the turbines may impact on existing sports pitches on the site, and East Midlands Airport, who said the site lay on a flight path and the turbines may interfere with air traffic control radars.
The flight attendants contacted the pilot, who contacted UK air traffic control authorities, who then scrambled the fighter jets, he said.
Cuts to the FAA would likely result in more flight cancellations, delays, and the complete elimination of air traffic control services in parts of the country.
WHITEHOUSE: President Obama Speaks at the Associated Press Luncheon
Any flight outside of these very tight parameters requires permission from the air traffic control.
Actual flight performance has gotten more unpredictable because of problems in the air-traffic control system.
Michael Boyd, president of Colorado aviation consulting firm Boyd International Group, is critical of the recommendation, saying the country could handle the current flight demand -- and cut delays -- by improving its air traffic control system.
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