What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Aircaft departed bfi at 1205 headed north to vancouver, Canada. The pilot had climbed to approx. 1000 ft MSL and had an indicated airspeed of 10 KTS. Along the east side of lake union, just as he was going to call Seattle radio to open his flight plan, he heard a lound bang and felt vibrations in the main rotor system. He did not know he had hit another aircraft. He tool precautionary actions, not knowing the cause of the vibrations, and after determining he had control of the aircraft he made a precautionary landing at the medvac helipad at the university of Washington. He was notified on the ground of the mid air with N5735A no injuries and damage was primarily to the leading edge and top surface of one main rotor blade approx. 1 ft from tip blade.
As the FAA filed it
(-23) AIRCAFT DEPARTED BFI AT 1205 HEADED NORTH TO VANCOUVER, CANADA. THE PILOT HAD CLIMBED TO APPROX. 1000 FT MSL AND HAD AN INDICATED AIRSPEED OF 10 KTS. ALONG THE EAST SIDE OF LAKE UNION, JUST AS HE WAS GOING TO CALL SEATTLE RADIO TO OPEN HIS FLIGHT PLAN, HE HEARD A LOUND BANG AND FELT VIBRATIONS IN THE MAIN ROTOR SYSTEM. HE DID NOT KNOW HE HAD HIT ANOTHER AIRCRAFT. HE TOOL PRECAUTIONARY ACTIONS, NOT KNOWING THE CAUSE OF THE VIBRATIONS, AND AFTER DETERMINING HE HAD CONTROL OF THE AIRCRAFT HE MADE A PRECAUTIONARY LANDING AT THE MEDVAC HELIPAD AT THE UNIVERSITY OF WASHINGTON. HE WAS NOTIFIED ON THE GROUND OF THE MID AIR WITH N5735A NO INJURIES AND DAMAGE WAS PRIMARILY TO THE LEADING EDGE AND TOP SURFACE OF ONE MAIN ROTOR BLADE APPROX. 1 FT FROM TIP BLADE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.