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Wednesday, February 16, 2011

United grounds its Boeing 757 fleet


United is checking the air data computers on its 96 Boeing 757s.
United is checking the air data computers on its 96 Boeing 757s.
STORY HIGHLIGHTS
  • The planes' modified computer system is getting maintenance checks
  • Some flights will be delayed or canceled, a spokesman says
  • The flight schedule should be back to normal Wednesday, he says
(CNN) -- United Airlines has grounded 96 Boeing 757 airliners for "unscheduled maintenance," an airline spokesman said Tuesday.
The grounding meant that some of the airline's flights would be canceled or delayed Tuesday night and Wednesday, spokesman Rahsaan Johnson said.
"Specifically ... United is performing follow-up maintenance checks starting today to the air data computers on its 96 Boeing 757s," Johnson said. "All of the air data computers are fully functional. The checks are necessary as part of a modification process to the system."
Johnson, who said the checks have already begun, said the procedures takes about 60 to 90 minutes per aircraft and that the airline should be ready to return to full service within the next 12 to 24 hours.
The Federal Aviation Administration said United's action involves its compliance with an airworthiness directive issued in 2004 that required a modification to the air data computer system to ensure that flight crews would be able to stop an overspeed or stall warning that sounded in error.
"This is a voluntary action on United's part, and we will follow up as necessary," said the FAA's Laura Brown.

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