FAA accident report · Hughes 269C · Clanton, AL · April 20, 1977
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.
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Helo developed severe vibrations.
HELO DEVELOPED SEVERE VIBRATIONS.
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.