Aviation Accident Summaries

Aviation Accident Summary ATL90DKG02

ELBERTON, GA, USA

Aircraft #1

N73871

BELL 47G/TOMCAT MK5

Analysis

THE PILOT WAS CONDUCTING A SPRAYING OPERATION IN SUPPORT OF A FEDERAL BOLLWEEVIL ERADICATION PROGRAM. THE HELICOPTER WAS APPROACHING A COTTON FIELD AT 500 FT AGL WHEN THE OWNER BELIEVES HE SAW THE HELICOPTER TURN AWAY. IT THEN WAVERED LATERALLY RIGHT TO LEFT, A LOUD NOISE FOLLOWED, ALL ENGINE NOISE CEASED AND THE HELICOPTER APPEARED TO FALL STRAIGHT DOWN. FIVE SECONDS LATER, A CRASHING SOUND WAS HEARD. WRECKAGE EXAMINATION REVEALED ONLY SMALL AMOUNTS OF FUEL IN THE ENGINE AND ACCESSORIES. HOWEVER, THE FLIGHT DEPARTED WITH ABOUT 25 GALLONS OF FUEL. WEATHER CONDITIONS WERE CONDUCIVE TO CARB ICE WITH THE TEMP BEING 74 DEGS AND THE DEWPOINT AT 6O DEGS. INVESTIGATION FAILED TO DISCLOSE EVIDENCE OF AN ATTEMPTED AUTOROTATIVE PROCEDURE OR A MECHANICAL FAILURE.

Probable Cause and Findings

A LOSS OF ENGINE POWER DUE TO CARBURETOR ICE.

 

Source: NTSB Aviation Accident Database

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