ASN Wikibase Occurrence # 358019
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| Date: | Wednesday 15 November 1995 |
| Time: | 12:00 LT |
| Type: |  Bell 47D-1 |
| Owner/operator: | Private |
| Registration: | N4702S |
| MSN: | B-101R |
| Engine model: | FRANKLIN 6V335 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Jasper, FL -
 United States of America
|
| Phase: | Approach |
| Nature: | Agricultural |
| Departure airport: | , FL |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT STATED HE WAS MAKING AN APPROACH FOR LANDING AT A FIELD SITE WHEN THE HELICOPTER EXPERIENCED A PARTIAL LOSS OF ENGINE POWER. HE LOWERED THE COLLECTIVE AND ROLLED THE THROTTLE TO THE FULL ON POSITION. THE HELICOPTER COLLIDED WITH POWER LINES AND THE GROUND. REVIEW OF THE AIRCRAFT LOG BOOKS REVEALED THAT THE LAST ANNUAL INSPECTION WAS COMPLETED 3 MONTHS BEFORE THE ACCIDENT. THE CARBURETOR WAS NOT APPROVED FOR USE BY THE FRANKLIN ENGINE COMPANY. EXAMINATION OF THE CARBURETOR HEAT CONTROL VALVE REVEALED AN INCORRECT SPRING INSTALLED, AND THE CARBURETOR HEAT COULD NOT BE ACTIVATED FROM THE COCKPIT. THE CARBURETOR ICING PROBABILITY CHART SHOWS THE POSSIBILITY OF CARBURETOR ICING CONDITIONS BASED ON THE WEATHER AT THE TIME OF THE ACCIDENT. PRIOR TO THE APPROACH, THE PILOT HAD COMPLETED THE BEFORE-LANDING CHECK WITHOUT THE AID OF A CHECKLIST, AND THE CARBURETOR HEAT WAS NOT TURNED ON.
Probable Cause: IMPROPER MAINTENANCE AND INSPECTION OF THE CARBURETOR SYSTEM BY MAINTENANCE PERSONNEL DURING THE LAST ANNUAL INSPECTION WHICH RESULTED IN A PARTIAL LOSS OF ENGINE POWER DUE TO CARBURETOR ICE. CONTRIBUTING TO THE ACCIDENT WERE: THE PILOT'S FAILURE TO PERFORM AN ADEQUATE PREFLIGHT AND ENGINE RUN-UP, AND THE CARBUETOR ICING CONDITIONS.
Accident investigation:
 |
|
Sources:
NTSB MIA96LA028
History of this aircraft
Other occurrences involving this aircraft
| 29 August 1998 | N4702S | Southern Helicopters | 0 | Dawson, GA | |
sub |
| 20 August 2002 | N4702S | Eugene And Holly Mullis | 0 | Union, South Carolina | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 09:06 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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