The Federal Aviation Administration (FAA) and National Transportation Safety Board (NTSB) are investigating an incident involving a Southwest flight that took off from a temporarily closed runway last week.
The incident occurred in the early hours of June 25 at Portland International Jetport (KPWM), when a Southwest Boeing 737 took off on Runway 29 at 5:43 a.m.—two minutes before the runway and tower were set to open.
According to LiveATC.net, controllers made several attempts to warn the crew of Flight 4805 that the runway was still closed. At the time, an airport vehicle was on the runway conducting an inspection.