NTSB Identification: CHI92FA145.
The docket is stored on NTSB microfiche number 47068.
Accident occurred Sunday, May 10, 1992 in ARNOLD, NE
Probable Cause Approval Date: 07/26/1993
Aircraft: PIPER PA-18, registration: N7282K
Injuries: 3 Fatal.
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.
A PILOT AND TWO PASSENGERS BOARDED A TWO-SEAT AIRPLANE. ONE PASSENGER KNELT BEHIND THE REAR SEAT, PLACING THE AIRPLANE AT ITS REAR CG LIMIT. THE AIRPLANE WAS OBSERVED A MILE FROM ITS FARM STRIP, IN A TURN TO REVERSE DIRECTION. THE ENGINE WAS RUNNING, BUT CUTTING OUT. NEARING 180 DEGREES OF TURN, THE AIRPLANE ABRUPTLY PITCHED DOWN AND DESCENDED TO GROUND IMPACT. NO AIRFRAME DISCREPANCY WAS FOUND. THE ENGINE APPEARED TO BE RUNNING RICH DUE TO CARBURETOR FLOAT MALADJUSTMENT. AUTO GAS DRAWN FROM THE FARM'S FUEL SUPPLY WAS STALE AND CONTAINED WATER.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: THE PILOT'S FAILURE TO MAINTAIN AIRSPEED. FACTORS IN THE ACCIDENT WERE IMPROPER ADJUSTMENT OF THE CARBURETOR FLOAT LEVEL BY AN UNKNOWN PERSON, AND THE PILOT'S DISREGARDING WEIGHT-AND-BALANCE.
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