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Accident
Last updated: 14 December 2017
Status:Schlussbericht
Datum:Samstag 2 Oktober 1971
Zeit:10:10 UTC
Flugzeugtyp:Vickers 951 Vanguard
Fluggesellschaft:British European Airways - BEA
Kennzeichen: G-APEC
Werknummer: 706
Baujahr: 1959-10-17 (12 years)
Betriebsstunden:21683
Anzahl Zyklen der Zelle:17261
Triebwerk: 4 Rolls-Royce Tyne 506
Besatzung:Todesopfer: 8 / Insassen: 8
Fluggäste:Todesopfer: 55 / Insassen: 55
Gesamt:Todesopfer: 63 / Insassen: 63
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:1 km (0.6 Meilen) E of Aarsele (   Belgien)
Flugphase: Während des Fluges (ENR)
Betriebsart:Internationaler Linienflug
Flug von:London-Heathrow Airport (LHR/EGLL), Großbritannien
Flug nach:Salzburg-W. A. Mozart Airport (SZG/LOWS), Österreich
Flugnummer: 706
Unfallbericht:
En route from London (LHR) to Salzburg (SZG) at an altitude 19000 feet the rear pressure bulkhead ruptured. An explosive decompression of the fuselage occurred, causing serious interior damage and severe distortion of upper tailplane skin attachments. The tail surfaces subsequently detached, causing the airplane to enter a steep dive. The Vanguard spiraled down out of control and crashed in a field next to a highway.
During the investigation corrosion was found in the lower part of the rear pressure bulkhead underneath plating that was bonded to the structure. The bond was completely delaminated in this area and the bulkhead material literally eaten away. Fluid contamination, perhaps from the lavatory, was thought to have been the root cause for the corrosion.

Probable Cause:

CAUSE: "The accident was caused by the rupture of the rear pressure bulkhead, which led to the separation both tailplanes in flight and caused the aircraft to dive into the ground."

Accident investigation:
cover
Investigating agency: AIB
Status: Investigation completed
Duration: 10 months
Accident number: AAR 15/1972
Download report: Final report

Informationsquelle:
» Applying Lessons Learned From Accidents : Accident/Incident Summary Japan Airlines Flight 123, Boeing 747, Gunma Prefecture Japan


Sicherheitsempfehlungen
Inspections of other Vickers Vanguard planes revealed similar corrosion in eight other aircraft. Inspection procedures were revised and the airplane was modified to improve access to the inspected area. The frequency of inspections was increased considerably.

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from London-Heathrow Airport to Salzburg-W. A. Mozart Airport as the crow flies is 1043 km (652 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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