ASN Wikibase Occurrence # 19058
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| Date: | Sunday 2 August 1987 |
| Time: | 09:52 |
| Type: |  Stampe SV.4B |
| Owner/operator: | Tiger Club |
| Registration: | G-ATKC |
| MSN: | 1081 |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Shingay, near Royston, Hertfordshire -
 United Kingdom
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Demo/Airshow/Display |
| Departure airport: | Little Gransden, Cambridgeshire |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft was performing aerobatics when the left hand pair of wings failed & folded back alongside the fuselage. The aircraft spiralled to the ground from a height of about 600 feet. Both occupants were killed instantly.
The steel tie-rods, which lie across the underside of the fuselage & link together the main spars of the lower mainplanes, were found to have failed at the left-hand ends. The failures had occurred within the threaded areas. The rod ends & nuts were not recovered. Metallurgical examination revealed fatigue in the rear rod had started from multiple origins in the thread root on the lower side & progressed upwards until complete failure occurred. The forward rod had similar fatigue origins. small fatigue cracks were also found on rh rear tie-rod. Stampe tie-rods were the subject of a Safety Bulletin by Aerospatiale in 1971. A UK manufacturer offered an alternative design approved as a minor modification in 1972. This type of rod was fitted to G-ATKC. It was also noted that the tie rods from this a/c were assembled with spring washers instead of plain ones & this could possibly cause undesirable bending stresses.
CAA closure: CAA Emergency Airworthiness Directive nr 011-03-88 dated 30 March 1988 requires that a/c with tie-rods that have flown in excess of 100hrs must be inspected before further flight. A reduction in the replacement life of lower mainplane centre section tie-rods to modification war 210 issue 1 or issue 2 standard & re-instatement of 500 flying hours life for the Aerospatiale SV4A-s.1500.05 tie rods.
Registration G-ATKC cancelled by CAA as "aircraft destroyed" 8/3/1988
Accident investigation:
 |
|
Sources:
1. http://www.lightaircraftassociation.co.uk/ExcelFiles/Permit%20Conditions%20Paper%20Annex%20A%20-%20Acciidents%20to%20light%20aircraft.xls
2. https://www.gov.uk/aaib-reports/stampe-sv4c-g-g-atkc-2-august-1987
3. http://www.caa.co.uk/aircraft-registration/
4 http://www.aaib.gov.uk/cms_resources.cfm?file=/Stampe%20SV4C%20G,%20G-ATKC%20%2002-88.pdf
5. https://www.tigerclub.co.uk/tailends.html
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-May-2008 11:10 | ASN archive | Added |
| 05-Jun-2009 00:50 | harro | Updated |
| 08-Jul-2012 13:25 | Dr. John Smith | Updated [Time, Location, Departure airport, Source, Narrative] |
| 19-Aug-2012 16:00 | Dr. John Smith | Updated [Embed code, Narrative] |
| 28-May-2013 22:49 | Dr. John Smith | Updated [Source, Embed code, Narrative] |
Corrections or additions? ... Edit this accident description
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