What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) N427DM was being marshalled out of a tight parking space at signature FBO at iad between a Learjet and a falcon 900 with a marshaller in front and a wingwalkter on each wing. N427DM'S right wing impacted the nose of the falcon. The pilot was wtaching the left wing, answering a radio call and observed the wingwalker on the right displaying the thumbs up sign. N427DM and the falcon both sustained minor damage. No injuries.
As the FAA filed it
(-23) N427DM WAS BEING MARSHALLED OUT OF A TIGHT PARKING SPACE AT SIGNATURE FBO AT IAD BETWEEN A LEARJET AND A FALCON 900 WITH A MARSHALLER IN FRONT AND A WINGWALKTER ON EACH WING. N427DM'S RIGHT WING IMPACTED THE NOSE OF THE FALCON. THE PILOT WAS WTACHING THE LEFT WING, ANSWERING A RADIO CALL AND OBSERVED THE WINGWALKER ON THE RIGHT DISPLAYING THE THUMBS UP SIGN. N427DM AND THE FALCON BOTH SUSTAINED MINOR DAMAGE. NO INJURIES.