ASN Wikibase Occurrence # 36051
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| Date: | Monday 10 July 1995 |
| Time: | 08:00 LT |
| Type: |  Bell 47G-3B-1 |
| Owner/operator: | Atlantic Blueberry Company |
| Registration: | N48316 |
| MSN: | 3628 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 6520 hours |
| Engine model: | Lycoming VO-435-A1F |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Hammonton, NJ -
 United States of America
|
| Phase: | En route |
| Nature: | Agricultural |
| Departure airport: | Hammanton, NJ |
| Mays Landing, NJ | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
At the end of an aerial application mission, the helicopter was refueled, and the pilot departed for home base. A few minutes after takeoff, the helicopter collided with trees. Examination of the engine and drive train revealed no preimpact failure; however, the collective pitch control yoke bearing had failed. The ball bearings and race in the yoke bearing were observed to be pitted, and the ball bearings were worn undersized. The last inspection of the yoke bearing occurred about 9 years and 839 flight hours before the accident, during the 1,200 hour inspection. The yoke bearing was not required to be inspected during the recent 600 hour inspection. The bearing was an on-condition item, and did not have a scheduled time change. The bearing could not be inspected, while installed on the helicopter.
Probable Cause: failure of the collective yoke bearing, which resulted in an uncontrolled descent and collision with trees. A factor relating to the accident was: the manufacturer's inadequate inspection interval of the yoke bearing.
Accident investigation:
 |
|
Sources:
NTSB NYC95LA147
History of this aircraft
Other occurrences involving this aircraft
| 18 December 1983 | N48316 | Scenic Rotors, Inc. | 0 | Dummerston, VT | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 25-Aug-2014 17:42 | A.J.Scholten | Updated [Narrative] |
| 21-Dec-2016 19:22 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 13:43 | ASN Update Bot | Updated [Time, Other fatalities, Destination airport, Source, Narrative, Accident report] |
Corrections or additions? ... Edit this accident description
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