A Lufthansa Airbus A330-300 collided with a Colgan Air Bombardier Dash 8 Q400 at Washington Dulles International Airport on 10 August.
No one was injured in the incident, which took place at about 15:15 local time, says the National Transportation Safety Board.
The A330, registration D-AIKE, was taxiing for takeoff at the time of the incident, while the Colgan Q400, registration N341NG, was stationary and waiting for ramp workers to assist with parking at gate A1C. While taxiing, the right wing of the A330 collided with the rudder and vertical stabiliser of the Q400, says French investigation agency BEA.
The Q400, which was operating as United Express, received substantial damage to its rudder and vertical stabiliser, while the A330 received minor damage to its right wingtip, says the NTSB.
"Visual meteorological conditions prevailed at the time of the accident," it adds.
French investigation authority BEA says the flight recorders from both aircraft have been removed for download.