NTSB Identification: CHI90DER03.
The docket is stored on NTSB microfiche number 42089.
Accident occurred Tuesday, July 31, 1990 in COON RAPIDS, MN
Probable Cause Approval Date: 09/21/1992
Aircraft: BELL 47G3B1, registration: N4990H
Injuries: 1 Uninjured.

WHILE IN NORMAL CRUISE FLIGHT, THE HELICOPTER EXPERIENCED A TOTAL LOSS OF ENGINE POWER. AN AUTOROTATIONAL LANDING WAS ATTEMPTED, HOWEVER THE PILOT MISJUDGED THE FLARE AND LANDED HARD RENDERING SUBSTANTIAL DAMAGE TO THE AIRCRAFT. SUBSEQUENT INVESTIGATION REVEALED ONLY UNUSABLE FUEL IN THE TANKS OF THE HELICOPTER. WHEN FUEL WAS ADDED TO THE TANKS THE ENGINE RAN NORMALLY.

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

THE PILOT-IN-COMMAND'S INACCURATE FUEL CONSUMPTION CALCULATIONS AND MISJUDGEMENT OF HIS FUEL SUPPLY.

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