The Federal Aviation Administration investigation after an evacuation slide fell off a plane and into a suburban Boston backyard.
Authorities say no one was hurt by the mishap as the jetliner, which was flying from Paris, France, approached Boston Logan International Airport.
Airline workers discovered that the right rear slide was missing from the plane after it landed.
A Delta Air Lines spokeswoman confirmed to the Boston Herald that the uninflated slide fell around noon on Sunday, local time.