NTSB Identification: CEN13CA022
14 CFR Part 91: General Aviation
Accident occurred Sunday, October 21, 2012 in Loop, TX
Probable Cause Approval Date: 01/22/2013
Aircraft: ROBINSON HELICOPTER R44, registration: N7507K
Injuries: 1 Minor,3 Uninjured.
NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.
Before the accident flight, the pilot asked for the weights of passengers, fueled the helicopter accordingly, and then flew to pick up the passengers. However, when the pilot arrived to pick up the passengers, they appeared to be heavier than the weights he had used for them in his preflight planning. The pilot reported that he was able to lift off and bring the helicopter to a hover, so the helicopter seemed to have sufficient power for takeoff. However, as the helicopter flew forward over a thicket, the main rotor rpm began to decrease. The pilot lowered the nose to increase rpm. The rpm did not increase, and the helicopter impacted terrain hard and sustained substantial damage when its tailboom separated. The pilot estimated that the helicopter’s weight at the time of the accident was inside the envelope for in-ground-effect operations, but was outside the envelope for out-of-ground-effect operations. The pilot reported that there were no mechanical malfunctions with the helicopter during the flight. The pilot stated that he should have requested that one person remain on the ground until more fuel was burned off.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot’s inadequate performance calculations, which resulted in an overweight takeoff for the conditions and the subsequent hard impact with terrain. Full narrative available
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