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Last updated: 26 May 2019
Statuts:Enquête Officielle
Date:dimanche 11 décembre 1977
Heure:11:20
Type/Sous-type:Silhouette image of generic P3 model; specific model in this crash may look slightly different
Lockheed P-3B Orion
Compagnie:United States Navy
Immatriculation: 153428
Numéro de série: 185-5225
Année de Fabrication: 1967
Equipage:victimes: 13 / à bord: 13
Passagers:victimes: 0 / à bord: 0
Total:victimes: 13 / à bord: 13
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:El Hierro, Canary Islands (   Espagne)
Phase de vol: En vol (ENR)
Nature:Militaire
Aéroport de départ:Terceira-Lajes AFB, Azores (TER/LPLA), Portugal
Aéroport de destination:Terceira-Lajes AFB, Azores (TER/LPLA), Portugal
Détails:
The P-3 Orion aircraft departed at 08:36 on a ship surveillance mission. Approximately two hours after takeoff the aircraft reported all systems essential to the mission were operating normally. No further radio contact was made. At 11:20 the aircraft struck a mountain on a small island named El Hierro, at an altitude of 2300 ft msl. The top of the mountain was at 5200 ft msl. Visibility at the crash site was 50 meters in rain. The aircraft impacted in level flight at 220 knots. All engines were operating, except for #1, which was shutdown for loiter.
The PPC, navigator, radar operator and flight engineer were at the NCO club until 02:00 local, consuming alcoholic beverages. The post mortem showed that the navigator had experienced a myocardial infarction.
The island was located inside the northwest corner of the assigned patrol area. It is very possible that the crew was unaware of the island.

Probable Cause:

PROBABLE CAUSE FACTORS:
Flight crew - violation of natops regarding alcohol consumption/crew rest prior to flight.
Supervisory/squadron - failure to implement an effective aircrew surveillance program.

CONTRIBUTORY FACTOR:
Flight crew complacency - nonadherence to sound navigation procedures.

POSSIBLE CAUSE FACTOR:
TSC briefing display omission of the three Canary Islands.
Weather conditions - fog and rain.

Sources:
» Brunswick Times Record December 12, 1977
» P-3 Orion Aircraft Location Report (P-3 Orion Research Group - The Netherlands)
» US Crashes 1950-2002 / Jan van Waarde
» US Navy and US Marine Corps Aircraft Serial Numbers and Bureau Numbers--1911 to Present / Joe Baugher
» VPNavy.org


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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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