ASN Wikibase Occurrence # 19522
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| Date: | Thursday 20 March 1975 |
| Time: | 11:00 |
| Type: |  Bell 47G-5A |
| Owner/operator: | Alan Mann Helicopters |
| Registration: | G-BBKP |
| MSN: | 25148 |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Grange Farm, Kingswood, Gloucestershire -
 United Kingdom
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Axford |
| Hereford | |
| Investigating agency: | AIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The accident happened when the aircraft went out of control following a main rotor blade strike on
the cockpit canopy and the port side elevator.
Suspected engine overheating, Main Rotor Blade Contacted airframe probably due low RRPM. Engine mounts weakened by low RPM vibration. Rotor Assembly tilited due to loose engine mounts.
It is concluded that though the cause of the accident could not be established, it is probable that rotor instability occurred following the loss of rotor rpm in association with a loss of engine power due to overheating
Accident investigation:
 |
|
Sources:
http://www.aaib.gov.uk/cms_resources.cfm?file=/17-1976%20G-BBKP.pdf
http://www.griffin-helicopters.co.uk/accidentdetails.aspx?accidentkey=49046
http://www.caa.co.uk/docs/HistoricalMaterial/G-BBKP.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-May-2008 11:56 | harro | Added |
| 21-Oct-2011 07:59 | Dr. John Smith | Updated [Time, Cn, Operator, Nature, Destination airport, Source, Narrative] |
| 20-Sep-2014 15:50 | TB | Updated [Location, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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