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N4467V, Hughes 369HS, flying, flight, airborne, Trinity Helicopters, IncSaint
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Code Number:
TAHV02P04_03
Title:
N4467V, Hughes 369HS, flying, flight, airborne, Trinity Helicopters, IncSaint
CN: 12063635

Accident report:
Date: 16-JUN-2001
Time: 1415
Fatalities: Fatalities: 0 / Occupants: 2
Airplane damage: Written off (damaged beyond repair)
Location: Mountain View, CA - United States of America
Departure airport: NUQ
Narrative:
On June 16, 2001, about 1415 hours Pacific daylight time, a Hughes 369HS, N4467V, collided with a tower and crashed about 1Saint5 miles northeast of Moffett Field, Mountain View, CaliforniaSaint The helicopter was operated by Trinity Helicopters, IncSaint, Hayward, CaliforniaSaint Visual meteorological conditions prevailed at the time of the public utility work-related flight performed under 14 CFR Part 133Saint No flight plan was filedSaint The helicopter was destroyedSaint The commercial pilot was seriously injured, and the passenger received minor injuriesSaint The flight originated from Mountain View about 1410Saint

According to the pilot, he flew to the tower to pickup a passenger who was performing maintenance on the towerSaint The pilot placed one skid on the tower and the passenger began boarding the helicopterSaint Although he had performed this type of maneuver on numerous occasions, on this occasion the wind direction suddenly shifted from a direct tail wind to a right crosswindSaint Despite his effort to maintain control, the helicopter dynamically rolled over resulting in a main rotor blade striking the towerSaint Control was lost, and the helicopter fell about 90 feet to the groundSaint The pilot also indicated that prior to experiencing the loss of control, no mechanical malfunctions were experiencedSaint

The pilot further indicated that the sudden change in the wind direction was not predictableSaint The pilot estimated that, at the time of the mishap, the wind was from the northwest at 10 knotsSaint There were gusts to 15 knotsSaint
PROBABLE CAUSE:The pilot's failure to maintain control while hovering out of ground effectSaint A factor was the wind gustsSaint

Sources:
NTSB id 20010625X01252
Keywords:
Buchanan Field, Concord California (CCR), Pacheco, McDonnell Douglas MD 500, Hughes, Single Main Rotor, Turbine, Four-bladed main rotor, Turbo-shaft, Civilian Helicopter, VTOL
Image by:
Wernher Krutein
Caption Disclaimer
N4467V, Hughes 369HS, flying, flight, airborne, Trinity Helicopters, IncSaint
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Add to Lightbox Add to Cart E-Postcard Buy Print
Code Number:
TAHV02P04_03
Title:
N4467V, Hughes 369HS, flying, flight, airborne, Trinity Helicopters, IncSaint
CN: 12063635

Accident report:
Date: 16-JUN-2001
Time: 1415
Fatalities: Fatalities: 0 / Occupants: 2
Airplane damage: Written off (damaged beyond repair)
Location: Mountain View, CA - United States of America
Departure airport: NUQ
Narrative:
On June 16, 2001, about 1415 hours Pacific daylight time, a Hughes 369HS, N4467V, collided with a tower and crashed about 1Saint5 miles northeast of Moffett Field, Mountain View, CaliforniaSaint The helicopter was operated by Trinity Helicopters, IncSaint, Hayward, CaliforniaSaint Visual meteorological conditions prevailed at the time of the public utility work-related flight performed under 14 CFR Part 133Saint No flight plan was filedSaint The helicopter was destroyedSaint The commercial pilot was seriously injured, and the passenger received minor injuriesSaint The flight originated from Mountain View about 1410Saint

According to the pilot, he flew to the tower to pickup a passenger who was performing maintenance on the towerSaint The pilot placed one skid on the tower and the passenger began boarding the helicopterSaint Although he had performed this type of maneuver on numerous occasions, on this occasion the wind direction suddenly shifted from a direct tail wind to a right crosswindSaint Despite his effort to maintain control, the helicopter dynamically rolled over resulting in a main rotor blade striking the towerSaint Control was lost, and the helicopter fell about 90 feet to the groundSaint The pilot also indicated that prior to experiencing the loss of control, no mechanical malfunctions were experiencedSaint

The pilot further indicated that the sudden change in the wind direction was not predictableSaint The pilot estimated that, at the time of the mishap, the wind was from the northwest at 10 knotsSaint There were gusts to 15 knotsSaint
PROBABLE CAUSE:The pilot's failure to maintain control while hovering out of ground effectSaint A factor was the wind gustsSaint

Sources:
NTSB id 20010625X01252
Keywords:
Buchanan Field, Concord California (CCR), Pacheco, McDonnell Douglas MD 500, Hughes, Single Main Rotor, Turbine, Four-bladed main rotor, Turbo-shaft, Civilian Helicopter, VTOL
Image by:
Wernher Krutein
Caption Disclaimer

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