Bell 206 N295AE accident near Hydro, Oklahoma

Probable cause

The helicopter’s inflight collision with cackling geese, resulting in an inflight breakup.

NTSB analysis

The helicopter was en route back to the crew’s home airfield when it encountered a flock of geese during the night flight. The helicopter was in cruise flight about 500-600 ft above ground level and at 110 knots groundspeed when the encounter occurred. The bird strike resulted in an inflight breakup of the helicopter and subsequent impact with terrain.

Examination of the helicopter did not reveal any preimpact anomalies that would have contributed to the accident. Bird strike signatures were located on the main rotor pitch change links, which were both fractured in overload. Loss of a main rotor pitch change link would result in the loss of main rotor blade pitch directional control, vibrations, and excessive blade flapping. DNA testing found that all remains were consistent with female cackling geese, which have an average mass of 4.2 pounds

Preflight mission planning for the flight would likely not have detected a risk for a bird strike. A review of military and civilian bird hazard websites showed that at the time of the accident, the probability of bird strike in that area was deemed to be low. In addition, historic migration data also estimated the probability of a bird strike at the time of the accident as low.

Text from the NTSB. Open the NTSB docket for CEN24FA094 for the full record.