NTSB Identification: LAX91FA086.
The docket is stored on NTSB microfiche number 43359.
Accident occurred Wednesday, January 30, 1991 in DUNSMUIR, CA
Probable Cause Approval Date: 07/13/1993
Aircraft: PIPER PA-24-180, registration: N7194P
Injuries: 1 Fatal,1 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PRIVATE PILOT APPLIED POWER FOR A GO-AROUND ABOUT 300 YARDS PAST THE APPROACH END OF THE RUNWAY. WITNESSES INDICATED THAT THE ENGINE DID NOT SOUND AS IF IT WS PRODUCING FULL POWER. THE AIRPLANE STRUCK A TREE TOP AND CRASHED. THE INVESTIGATION REVEALED THAT THE FUEL SYSTEM WAS CONTAMINATED BY SAND AND RUST. THE CARBURETOR HEAT CONTROL WAS IN THE 'ON' POSITION. THE AIRPLANE HAD AN ANNUAL INSPECTION 14 HOURS PRIOR TO THE ACCIDENT. THE AMOUNT OF POWER AVAILABLE COULD NOT BE QUANTIFIED OR VERIFIED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE PILOT'S DELAYED GO-AROUND ATTEMPT AND IMPROPER USE OF CARBURETOR HEAT. CONTRIBUTING TO THE ACCIDENT WAS A DEGRADATION OF ENGINE POWER DUE TO FUEL CONTAMINATION FROM SAND AND RUST.

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