A preliminary report by the National Transportation Safety Board says that the flight crew of a Southwest Airlines plane that took off from a temporarily closed runway at the Portland Jetport last month did not realize the runway was closed on that day.The Federal Aviation Administration said Southwest Airlines Flight 4805 to Baltimore departed from a temporarily closed runway on Tuesday, June 25, at about 5:45 a.m. An airport vehicle left the runway just before the plane began its takeoff. No one was hurt.According to a preliminary report on the incident, the flight crew reviewed a Southwest Airlines briefing packet that included weather reports and other notices, including that Jetport runway 29 would be closed from June 19 to July 24. The briefing also noted that the runway would be closed from 10:30 p.m. to 5:45 a.m. Monday through Friday and from midnight to 5:45 a.m. on Saturday and Sunday.”The flight crew also reviewed the (briefing) and noted that runway 29 was closed on Saturdays and Sundays until (5:45 a.m.) The captain incorrectly assumed that any additional days for the runway closure would be in the same (set of notes). The flight crew members did not see the separate (note) addressing the runway closure on the other days of the week,” the report states. That information “was underneath another application”, the report said.The report said that during the week of July 8, NTSB investigators interviewed the incident flight crew members and the dispatcher.The investigation is continuing.

A preliminary report by the National Transportation Safety Board says that the flight crew of a Southwest Airlines plane that took off from a temporarily closed runway at the Portland Jetport last month did not realize the runway was closed on that day.

The Federal Aviation Administration said Southwest Airlines Flight 4805 to Baltimore departed from a temporarily closed runway on Tuesday, June 25, at about 5:45 a.m. An airport vehicle left the runway just before the plane began its takeoff. No one was hurt.

According to a preliminary report on the incident, the flight crew reviewed a Southwest Airlines briefing packet that included weather reports and other notices, including that Jetport runway 29 would be closed from June 19 to July 24. The briefing also noted that the runway would be closed from 10:30 p.m. to 5:45 a.m. Monday through Friday and from midnight to 5:45 a.m. on Saturday and Sunday.

“The flight crew also reviewed the (briefing) and noted that runway 29 was closed on Saturdays and Sundays until (5:45 a.m.) The captain incorrectly assumed that any additional days for the runway closure would be in the same (set of notes). The flight crew members did not see the separate (note) addressing the runway closure on the other days of the week,” the report states. That information “was underneath another application”, the report said.

The report said that during the week of July 8, NTSB investigators interviewed the incident flight crew members and the dispatcher.

The investigation is continuing.

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