A wing section measuring 4 by 5 feet dislodged near Baltimore at 27,000 feet on a flight to Philadelphia from Orlando, Fla. The section struck several windows, cracking one, but the plane landed with no injuries.
Three clips attaching the wing section to the plane had fatigue cracks, the National Transportation Safety Board said. US Airways discovered cracked clips on seven of 18 757s inspected after the incident, the board said.
The Federal Aviation Administration is considering an inspection requirement, a spokeswoman said.