ASN Wikibase Occurrence # 133245
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| Date: | Tuesday 31 May 1994 |
| Time: | 08:35 LT |
| Type: | Bell 47G-3 Soloy |
| Owner/operator: | Helicopter Applicators, Inc. |
| Registration: | N121CD |
| MSN: | 3796 |
| Total airframe hrs: | 8509 hours |
| Engine model: | ALLISON 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Friendsville, MD -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AERIAL APPLICATION FLIGHT HAD BEEN AIRBORNE FOR APPROXIMATELY 30 MINUTES, IN THE TURBINE ENGINE CONVERTED BELL 47. THE HELICOPTER WAS OVER HILLY TERRAIN WITH TREE LINES. THE PILOT WAS FLYING AN UPHILL RUN AT 30 TO 40 FEET ABOVE TREE LEVEL, AT 60 TO 65 MILES PER HOUR, WHEN THERE WAS A PARTIAL LOSS OF ENGINE POWER. THE PILOT ATTEMPTED TO FLY TO AN OPEN AREA WITH PARTIAL POWER. THE HELICOPTER STRUCK A TREE AS IT APPROACHED THE EDGE OF A CLEARING. AFTER THE HELICOPTER CAME TO REST ON THE GROUND, THE PILOT SHUT THE ENGINE DOWN WITH THE TWIST GRIP THROTTLE. THE TRANSMISSION, THE FREE WHEELING UNIT AND THE TAIL ROTOR GEARBOX WERE EXAMINED, AND NO DEFECTS WERE NOTED. EXAMINATION OF THE ENGINE REVEALED ACCIDENT RELATED IMPACT DAMAGE TO THE COMBUSTION LINER. THE LINER WAS REPLACED AND THE ENGINE PERFORMED NORMALLY DURING A TEST RUN.
Probable Cause: THE PARTIAL FAILURE OF THE TURBINE ENGINE FOR UNDETERMINED REASONS, DURING AN AGRICULTURE MANEUVER AT LOW ALTITUDE, OVER TERRAIN UNSUITABLE FOR AN AUTOROTATION.
Accident investigation:
 |
|
Sources:
NTSB NYC94LA097
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Aug-2014 17:42 | A.J.Scholten | Updated [Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 07:09 | ASN Update Bot | Updated [Time, Other fatalities, Source, Narrative, Category, Accident report] |
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