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Last updated: 9 December 2021
Status:Definitief
Datum:woensdag 22 april 1992
Tijd:11:09
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Luchtvaartmaatschappij:Perris Valley Aviation
Registratie: N141PV
Constructienummer: 141
Bouwjaar: 1968
Aantal vlieguren:29391
Motoren: 2 Pratt & Whitney Canada PT6A-20A
Bemanning:slachtoffers: 2 / inzittenden: 2
Passagiers:slachtoffers: 14 / inzittenden: 20
Totaal:slachtoffers: 16 / inzittenden: 22
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:Perris Valley Airport, CA (   Verenigde Staten)
Fase: Initiële klim (ICL)
Soort vlucht:Parachute
Vliegveld van vertrek:Perris Valley Airport, CA, Verenigde Staten
Vliegveld van aankomst:Perris Valley Airport, CA, Verenigde Staten
Beschrijving:
A DHC-6 Twin Otter 200, N141PV, crashed during takeoff from Perris Valley Airport, California, following a loss of power in the airplane's right engine. Immediately after the airplane lifted off from runway 17, the right engine lost power, the right wing lowered to about 90º, and the airplane crashed adjacent to the runway.
The ground loader stated that he had fueled the airplane from the airport fuel truck and that the flight crew did not sump the airplane's fuel tanks after the airplane was fueled. Examination of the airplane's forward fuel tank, which provides fuel to the right engine, was found to contain about 8 gallons of a heavily contaminated mixture of water, an emulsifying agent, and bacterial growth. Both the airport's fuel truck, which contained fuel transferred from the airport's underground tank the evening before the accident, and the underground tank contained the same contaminated mixture. Examination of the wreckage revealed that the left propeller control was seized in the feather position and that the left propeller blades were in the near-feather position.

Probable Cause:

PROBABLE CAUSE: "The pilot-in-command's inadvertent feathering of the wrong propeller following an engine power loss, and the failure of the operator to assure that the pilot was provided with adequate training in the airplane. Factors related to the accident were: water contamination of fuel in the airport storage tanks, the operator's lack of fuel quality control procedures, improper fuel servicing, improper pre-flight by the pilot(s), and exceeding the gross weight/forward cg limits of the airplane."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 4 months
Accident number: LAX92MA183
Download report: Summary report

Bronnen:
» Air Safety Week 5 April 1993 (p. 6)
» ICAO Adrep Summary 5/94 (#42)
» NTSB Safety Recommendations A-94-16 through -19
» NTSB Safety Recommendations A-94-20 through -23


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NTSB issued 8 Safety Recommendations

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This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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DHC-6 Twin Otter

  • 930+ built
  • 165e ongeval
  • 108e dodelijk ongeval
  • 17e zwaarste ongeval (toen het plaatsvond)
  • 33e zwaarste ongeval (op dit moment)
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