The U.S. Federal Aviation Administration is investigating the uncontrolled reentry of part of a Falcon 9 rocket that delivered passengers to the International Space Station in a capsule that will return stranded astronauts Butch Wilmore and Suni Williams to Earth next year.

The incident prompted the U.S. Federal Aviation Administration to ground the rocket but Falcon 9 was back in the swing of things in no time, launching another batch of Starlink satellites three days later. August’s landing mishap ended a streak of 267 successful touchdowns and booster recoveries since February 2021.

NASA engineers are running checks to solve the mystery of why the Falcon 9's engine failed to perform a routine maneuver to lower the rocket's altitude.