ASN Aircraft accident de Havilland Canada DHC-6 Twin Otter 200 N141PV Perris Valley Airport, CA
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Status:Accident investigation report completed and information captured
Date:Wednesday 22 April 1992
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Operator:Perris Valley Aviation
Registration: N141PV
MSN: 141
First flight: 1968
Total airframe hrs:29391
Engines: 2 Pratt & Whitney Canada PT6A-20A
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 14 / Occupants: 20
Total:Fatalities: 16 / Occupants: 22
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:Perris Valley Airport, CA (   United States of America)
Phase: Initial climb (ICL)
Departure airport:Perris Valley Airport, CA, United States of America
Destination airport:Perris Valley Airport, CA, United States of America
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:

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

Fuel contamination
Shutdown of wrong engine
Loss of control

» 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

Follow-up / safety actions

NTSB issued 8 Safety Recommendations

Show all...


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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
  • 165th loss
  • 108th fatal accident
  • 17th worst accident (at the time)
  • 33rd worst accident (currently)
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