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.
Pilot induced engine overspeed by declutching rotors above 1600 RPM. Engine overspeed fractured lower pulley shaft.
As the FAA filed it
PILOT INDUCED ENGINE OVERSPEED BY DECLUTCHING ROTORS ABOVE 1600 RPM. ENGINE OVERSPEED FRACTURED LOWER PULLEY SHAFT.
Other reports on N9668F · 1
Matched to the same aircraft by N-number and date.