Accident Sikorsky S-76A G-BGXY, 12 Mar 1981
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ASN Wikibase Occurrence # 31902
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Time:c. 15:12 LT
Type:Silhouette image of generic S76 model; specific model in this crash may look slightly different    
Sikorsky S-76A
Owner/operator:Bristow Helicopters
Registration: G-BGXY
MSN: 760021
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:South Kirkton, near Peterhead, Aberdeenshire -   United Kingdom
Phase: En route
Departure airport:Aberdeen Airport, Dyce (ABZ/EGPD)
Destination airport:Aberdeen Airport, Dyce (ABZ/EGPD)
Investigating agency: AIB
Confidence Rating: Information verified through data from accident investigation authorities
Broke up in flight after a main rotor blade separated due to a fatigue failure of the spindle, killing all four persons on board.

Blade spindle loading had increased due to wear of a dry lubricated bearing and load had increased due to a deburring technique that did not replicate that tested during certification.

AAIB recommended that spindles be inspected after 200 flying hours, instead of 300, and replaced completely after 300 hours.

Another S-76A (PT-HKB) had crashed on 23 Mar 1980 after a spindle failure. AAIB note that G-BGXY suffered its failure 12 Mar 1981 prior to maintenance instructions for a dimensional check being issued after the accident to PT-HKB (though they had been drafted some months prior).


Accident investigation:
Investigating agency: AIB
Status: Investigation completed
Download report: Final report

Revision history:

27-Sep-2008 01:00 ASN archive Added
11-Jun-2010 12:32 TB Updated [Date, Time, Aircraft type, Registration, Cn, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Damage, Narrative, Plane category, ]
17-Nov-2012 13:21 Dr. John Smith Updated [Time, Departure airport, Source, Narrative]
25-Nov-2012 12:09 TB Updated [Time, Source, Narrative]
04-Jun-2013 17:34 Dr. John Smith Updated [Source, Narrative]
23-Oct-2015 18:28 Dr.John Smith Updated [Location, Departure airport, Destination airport, Source, Narrative]
28-Mar-2016 18:24 Aerossurance Updated [Time, Location, Source, Narrative]
09-May-2016 13:20 Aerossurance Updated [Narrative]

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