ASN Wikibase Occurrence # 366703
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| Date: | Thursday 28 June 1990 |
| Time: | 10:30 LT |
| Type: |  Bell 47G |
| Owner/operator: | Inland Air Lines, Inc. |
| Registration: | N3081G |
| MSN: | 3153 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 13608 hours |
| Engine model: | LYCOMING VO540-B1B3 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Seagrove, NC -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Southern Pines, NC |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE ON A ROUTINE POWER LINE PATROL FLIGHT, THE PILOT HEARD A LOUD NOISE FROM THE ENGINE COMPARTMENT. THE HELICOPTER YAWED TO THE LEFT, AND SPLIT ENGINE/ROTOR RPM INDICATIONS WERE OBSERVED. AN AUTOROTATION WAS PERFORMED IN A PARTIALLY CLEARED AREA AND THE HELICOPTER IMPACTED TREES AND TERRAIN. INSPECTION OF THE ENGINE REVEALED THE NUMBER FOUR CONNECTING ROD BELT HAD FAILED. THE CONNECTING ROD SEPARATED FROM THE CRANKSHAFT AND JAMMED ITSELF AGAINST THE CRANKSHAFT, RESULTING IN ENGINE STOPPAGE.
Probable Cause: FAILURE OF A NUMBER FOUR CONNECTING ROD BOLT FOR AN UNDETERMINED REASON.
Accident investigation:
 |
|
Sources:
NTSB ATL90LA138
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 11:15 | ASN Update Bot | Added |
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