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Last updated: 25 February 2018
Statuts:Enquête Officielle
Date:dimanche 24 mars 1968
Type/Sous-type:Silhouette image of generic VISC model; specific model in this crash may look slightly different
Vickers 803 Viscount
Compagnie:Aer Lingus
Immatriculation: EI-AOM
Numéro de série: 178
Année de Fabrication: 1957
Heures de vol:18806
Moteurs: 4 Rolls-Royce Dart 510A
Equipage:victimes: 4 / à bord: 4
Passagers:victimes: 57 / à bord: 57
Total:victimes: 61 / à bord: 61
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:3,1 km (1.9 milles) NE de Tuskar Rock (   Irlande)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Cork Airport (ORK/EICK), Irlande
Aéroport de destination:London-Heathrow Airport (LHR/EGLL), Royaume Uni
Numéro de vol: 712
Flight 712 departed Cork (ORK) at 10:32 for a flight to London (LHR) and was cleared for FL170. The crew reported at the Bannow reporting point at FL170 at 10:57 and were instructed to change frequency to London Airways. Just eight seconds after first reporting on the London ATC frequency, a message was received which was later interpreted as "Twelve thousand feet descending spinning rapidly". The Viscount descended and struck the sea 1,7nm from Tuskar Rock.

Probable Cause:

PROBABLE CAUSE: "There is not enough evidence available on which to reach a conclusion of reasonable probability as to the initial cause of this accident.
The probable cause of the final impact with the sea was impairment of the controllability of the aircraft in the fore and aft (pitching) plane."

A Report of the investigation carried out into this accident was published in 1970. This investigation was conducted by officials of the Aeronautical Section of the Department of Transport and Power. The exact cause of the accident has never been established (see the Probable Cause above). Speculation has continued since the time of the accident, prompted by a hypothesis posed in the Report, that the Viscount may have been initially upset by the possible presence of another airborne object, drone or missile in its vicinity at the time. On the 30th anniversary of the accident, following newspaper articles and television programmes focusing on the possible involvement of U.K ships and missile ranges on the Welsh Coast in the downing of the aircraft, it was decided that Irish and U.K. officials would review all files held relating to the accident to see if the cause of the accident could be established. It was a.o. concluded that "the possibility of a cause other than a (near) collision with another airborne object being the initial cause of the upset .. .. does not appear to have been adequately examined in the 1970 Report." Following the review, in July 2000, the Irish Minister for Public Enterprise commissioned this independent study of the accident circumstances. The Study Conclusions, although not in ICAO Annex 13 format, indicate that:
(a) There was no other airborne object, missile, or drone in the vicinity of the upset.
(b) The flight path, supported by a mix of 46 new and previous witnesses, cannot be reconciled with two alleged transmissions from the crew at 10.51 GMT and at 10.57 GMT i.e. 'Level at 170', shown in transcripts.
(c) Some maintenance compliance periods were exceeded by a factor of four jobs called at 1,400 flying hours although due at 350 hours.
(d) There was a conflict of interest in the original 1970 Report inasmuch as the person in charge of that Report was also the same man who authorized the C of A renewal for EI-AOM shortly before the crash, despite the fact that the paperwork for the ‘2.04’ Inspection was missing and remains lost
(e) The initial upset occurred circa 10.40 hours GMT at about FL90 during the climb above the village of Old Parish in County Waterford. The aircraft was recovered from the dive and flew an erratic path inland until 10.58 GMT when there was a second spin or spiral dive from which the crew also recovered the aircraft. Total loss of control then occurred some minutes later near Tuskar Rock.

Accident investigation:
Investigating agency: AAIU
Status: Investigation completed
Duration: 2 years and 3 months
Accident number: AAIU Report No. 1970-001
Download report: Final report


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Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Cork Airport et London-Heathrow Airport est de 551 km (344 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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Vickers Viscount

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  • 70ème loss
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