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Last updated: 25 September 2016
Statuts:Enquête Officielle
Date:mercredi 5 mars 1969
Type/Sous-type:Silhouette image of generic HERN model; specific model in this crash may look slightly different
de Havilland DH-114 Heron 2D
Immatriculation: N563PR
Numéro de série: 14125
Année de Fabrication: 1967
Heures de vol:4167
Moteurs: 4 de Havilland Gipsy Queen 30-2
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 17 / à bord: 17
Total:victimes: 19 / à bord: 19
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:24 km (15 milles) S of San Juan (   Porto Rico)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Saint Thomas Airport (STT/TIST), Vierges américaines
Aéroport de destination:San Juan-Isla Verde International Airport (SJU/TJSJ), Porto Rico
Numéro de vol: 277
Prinair flight 277 departed Saint Thomas at 17:15 for an IFR flight to San Juan. At 17:32, the flight contacted San Juan Approach Control and advised that the flight was maintaining 4,000 feet. The trainee approach controller replied:"Prinair two seven seven San Juan Approach Control radar contact three miles east of Isla Verde fly a heading of two five zero for a vector to ILS final maintain four thousand." Actually the flight was 3 miles east of the Fajardo intersection instead of the Isla Verde intersection which is located about 10 miles west of the Fajardo intersection. One minute later the Heron was cleared to descend to 3,000 feet. At 17:38, after being vectored for a runway 07 approach, the airplane contacted trees and crashed, coming to rest near the top of a knoll in the Sierra de Luquillo mountains at an elevation of about 2400 feet (731 m).

PROBABLE CAUSE: "The vectoring of the aircraft into mountainous terrain, under IFR conditions, without adequate obstruction clearance altitude by a controller who, for reasons beyond his control, was performing beyond the safe limits of his performance capability and without adequate supervision."


Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-70-09
report released:24 April 1970
duration of investigation: 1 year and 2 months
download report: Puerto Rico International Airlines, Inc., De Havilland Heron 114-2, N563PR, Sierra de Luguillo, San Juan, Puerto Rico, M (NTSB/AAR-70-09)

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NTSB issued 2 Safety Recommendations

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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 Saint Thomas Airport et San Juan-Isla Verde International Airport est de 108 km (68 miles).

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DH-114 Heron

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