From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
At an undetermined time and phase of flight, two helicopters, in a formation flight of four cobras, touched rotor blade tips in flight while conducting an air show exhibition. The damage on the rotor tips of the two helicopters involved caused vibrations that prompted the pilots to land and end the exhibition.
As the FAA filed it
AT AN UNDETERMINED TIME AND PHASE OF FLIGHT, TWO HELICOPTERS, IN A FORMATION FLIGHT OF FOUR COBRAS, TOUCHED ROTOR BLADE TIPS IN FLIGHT WHILE CONDUCTING AN AIR SHOW EXHIBITION. THE DAMAGE ON THE ROTOR TIPS OF THE TWO HELICOPTERS INVOLVED CAUSED VIBRATIONS THAT PROMPTED THE PILOTS TO LAND AND END THE EXHIBITION.