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ASN Wikibase Occurrence # 146976
Last updated: 27 November 2021
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Date:25-MAY-1998
Time:18:50 UTC
Type:Silhouette image of generic CONC model; specific model in this crash may look slightly different
Aérospatiale / BAC Concorde 102
Owner/operator:British Airways
Registration: G-BOAC
MSN: 204
Fatalities:Fatalities: 0 / Occupants: 64
Other fatalities:0
Aircraft damage: Minor
Location:Atlantic Ocean, 60 nm north of Isles of Scilly, Cornwall -   United Kingdom
Phase: En route
Nature:Passenger - Scheduled
Departure airport:London-Heathrow Airport (LHR)
Destination airport:
Investigating agency: AAIB
Narrative:
While climbing through FL410 over the Atlantic Ocean, 60 nautical miles north of Isles of Scilly, Cornwall, a slight rumble was experienced, which turned out to be the separation of a section of the left hand middle elevon (5 feet x 3 feet). The captain decided to return to Heathrow.

CONCLUSIONS:
1. The reason for failure of elevon 3L S/No 1006R could not be established, but circumstantially it may have originated in the repaired trailing edge area.
2. The most likely failure scenario probably involved the growth of a relatively small disbonded area to a critical size and subsequent instantaneous failure.
3. The growth of the suspected disbond was not detected by NDE, despite an inspection programme well in excess of mandatory requirements.
4. The NDE techniques applicable at the time neither required nor were capable of examining metal-metal bond lines for flaws. As such approximately 50% of the repair accomplished at the trailing edge was not inspectable.
5. Despite the almost complete loss of integrity of the surface, the effects on controllability of the aircraft were negligible. This corroborates the results of a theoretical and experimental study conducted by the manufacturers which was presented to the investigation team and also came to this conclusion.

Sources:

1. AAIB Bulletin No: 12/2000
2. AAIB: https://assets.digital.cabinet-office.gov.uk/media/5422edf640f0b613460001dd/dft_avsafety_pdf_500464.pdf
3. FAA: https://siteapps.caa.co.uk/g-info/rk=BOAC

Accident investigation:
cover
  
Investigating agency: AAIB
Status: Investigation completed
Duration:
Download report: Final report
Other occurrences involving this aircraft

29 Dec 1978 G-BOAC British Airways 0 near New York, NY unk
8 Mar 1984 G-BOAC British Airways 0 New York-John F. Kennedy International Airport, NY (JFK) min
11 Aug 1987 G-BOAC British Airways 0 New York-John F. Kennedy International Airport, NY (JFK) unk
9 Mar 1988 G-BOAC British Airways 0 London unk
13 Jun 2003 G-BOAC British Airways 0 North Atlantic, between London Heathrow and JFK New York min


Images:

Photo of G-BOAC courtesy AirHistory.net


Manchester - International (EGCC / MAN)
30 January 2006; (c) Trevor Thornton

Revision history:

Date/timeContributorUpdates
26-Jul-2012 07:21 harro Added
04-Mar-2016 18:11 Dr.John Smith Updated [Location, Source, Narrative]
10-Jul-2016 20:54 Dr.John Smith Updated [Location, Country, Narrative]

Corrections or additions? ... Edit this accident description