FAA blames 'damaged database file' for major NOTAM outage

There wasn't anything particularly sinister about the Notice to Air Missions (NOTAM) outage that prompted the Federal Aviation Administration to ground US flights on Wednesday — it appears to have been a relatively simple glitch. As part of its early investigation, the FAA has determined that the outage was prompted by a "damaged database file." The agency is still working to identify the exact causes and prevent repeat incidents, but says there's still "no evidence" of a cyberattack.