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Last updated: 20 September 2019
Statuts:Enquête Officielle
Date:vendredi 11 avril 1952
Heure:12:20 AST
Type/Sous-type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas DC-4
Compagnie:Pan American World Airways (Pan Am)
Immatriculation: N88899
Numéro de série: 10503
Année de Fabrication: 1945
Heures de vol:20835
Moteurs: 4 Pratt & Whitney R-2000
Equipage:victimes: 0 / à bord: 5
Passagers:victimes: 52 / à bord: 64
Total:victimes: 52 / à bord: 69
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:18 km (11.3 milles) NW de San Juan-Isla Grande Airport (SIG) (   Porto Rico)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:San Juan-Isla Grande Airport (SIG/TJIG), Porto Rico
Aéroport de destination:New York-Idlewild International Airport, NY (IDL/KIDL), Etats-Unis d'Amérique
Numéro de vol:PA526A
Détails:
The aircraft, named "Clipper Endeavour" took off from San Juan at 12:11 for a flight to New York when the no. 3 engine failed. The prop was feathered at 350 feet and the crew elected to return to San Juan. The aircraft reached an altitude of 550 feet but the no. 4 engine ran roughly and height couldn't be maintained. To avoid a possible forced landing in a congested area or on coral reef, the aircraft was ditched 11 miles NW of San Juan Airport, 4,5 miles offshore. The rear fuselage broke off behind the bulkhead aft of the main cabin. The plane sank in about 3 minutes.

Probable Cause:

PROBABLE CAUSE: "a) The company's inadequate maintenance in not changing the No. 3 engine which resulted in its failure immediately subsequent to take-off, and b) The persistent action of the captain in attempting to re-establish a climb, without using all available power, following the critical loss of power to another engine. This resulted in a nose-high attitude, progressive loss of airspeed and the settling of the aircraft at too low an altitude to effect recovery,"

Sources:
» CAB File No. 1-0026
» Ditch or crash-land?/B.W. Townshend, 1965 (30-32)
» ICAO Circular 38-AN/33 (58-60)


Opérations de secours
It was recommended to, in future, brief passengers about location and usage of floatation equipment and emergency exits before over-water flights.

Photos

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Plan
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 San Juan-Isla Grande Airport et New York-Idlewild International Airport, NY est de 2559 km (1599 miles).
Accident location: Exact; as reported in the official accident report.

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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Douglas DC-4

  • 1242 built
  • 164ème loss
  • 87ème accident fatal
  • le accident 6ème le plus grave (à ce moment là)
  • le accident 18ème le plus grave (en ce moment)
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 Porto Rico
  • le accident 2ème le plus grave (à ce moment là)
  • le accident 2ème le plus grave (en ce moment)
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