Pilot Debrief

ROBINSON R44 near Tonopah, NV — 2009-08-21

Final reportWPR09LA411
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Date
2009-08-21
Location
Tonopah, NV, USA
Aircraft
ROBINSON R44
Registration
N19DV
Category
Helicopter
Highest injury
Serious
Fatalities
0
Phase of flight
Maneuvering

Probable cause

The pilot’s failure to maneuver the helicopter within its performance capabilities while at a low altitude in mountainous terrain and in high density altitude conditions.

NTSB narrative

The pilot was providing aerial surveillance of a car that was in an off-road rally race. A passenger recalled that they had just climbed over a hill, and made a low banking turn to get behind a car that was in the race. He saw a steep cliff-like ridge ahead, and was concerned about hitting it. As they cleared the ridge by about 20 feet, he heard the engine sound change pitch. The helicopter banked right, and slowed down. The passenger heard the pilot say "no" several times as well as “come on,” followed by the sounding of a horn. The helicopter collided with the ground, touching down on the skids. The helicopter turned as it went downhill, and rolled over onto its right side. A postaccident examination of the airframe and engine revealed no anomalies that would have precluded normal operation. The density altitude was calculated to be about 10,300 feet. Examination of the performance charts for the helicopter indicated that, at the weather parameters for this flight, the power required for the maneuvers attempted exceeded the power available.

Analysis

Primary failure mode
Loss of control
First missed decision gate
Pilot could have avoided low banking turn near the cliff.

NTSB coding

Evidence available

  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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