We Now Know What Caused the FAA Outage

After all flights in the U.S. were grounded early Wednesday morning over a system failure, the Federal Aviation Administration said it traced the issue back to a “damaged database file.” 

“The FAA is continuing a thorough review to determine the root cause of the Notice to Air Missions (NOTAM) system outage,” the FAA said in a statement Wednesday night. “Our preliminary work has traced the outage to a damaged database file.”

The Notice to Air Missions system provides safety information to flight crews. 

“At this time, there is no evidence of a...