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Last updated: 25 September 2018
Statuts:
Date:mercredi 13 octobre 1976
Heure:13:32 EDT
Type/Sous-type:Silhouette image of generic B701 model; specific model in this crash may look slightly different
Boeing 707-131F
Opérant pour:Lloyd Aéreo Boliviano - LAB
Loué à :Jet Power
Immatriculation: N730JP
Numéro de série: 17671/48
Année de Fabrication: 1959
Moteurs: 4 Pratt & Whitney JT3C-
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 0 / à bord: 0
Total:victimes: 3 / à bord: 3
Victimes au sol:victimes: 88
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:0,6 km (0.4 milles) NW of Santa Cruz-El Trompillo Airport (SRZ) (   Bolivie)
Phase de vol: En montée initiale (ICL)
Nature:Cargo
Aéroport de départ:Santa Cruz-El Trompillo Airport (SRZ/SLET), Bolivie
Aéroport de destination:Miami International Airport, FL (MIA/KMIA), Etats-Unis d'Amérique
Détails:
A Boeing 707-131F cargo plane crashed during takeoff from Santa Cruz-El Trompillo Airport in Bolivia, killing all three crew members and 88 persons on the ground. A further 78 people were seriously injured.
The aircraft operated on a round trip from Miami, Florida, USA to Santa Cruz. It had delivered livestock to Santa Cruz and was departeding the flight back to Miami.
The take-off run was seen to be longer than usual and the aircraft crossed end of runway 32 at a height of about 6 meters. It struck trees, poles and the roofs of houses while rolling to the left and finally struck the ground inverted some 560 m beyond the runway. The aircraft impacted on a football pitch, bursting into flames.
Analysis of the accident was hampered by unserviceable flight recorders. The Flight Data Recorder (FDR) was not in operation at the time of the accident; when the cassette was opened the entire tape was found to be wound round the receiving reel. The three radio channels of the Cockpit Voice Recorder (CVR) contained some information but the cockpit area microphone channel was inoperative and the recording did not contain useful information.
The enquiry rules out structural and engine failure, flight control malfunction and systems failures as possible causes of the accident. The engine-pressure ratio (EPR) gauges showed 2.32, corresponding to the setting for a take-off with dry thrust.
On Boeing 707-100 aircraft equipped with Pratt & Whitney JT3C engines, de-mineralized water could be injected during takeoff to increase thrust. It was found that the water valves were open at the time of impact but it was not determined with certainty whether the crew attempted to perform a dry take-off but with reserve water, or whether the water was used with EPRs limited to 2.32 with the possibility of increasing the thrust when and as necessary.

Probable Cause:

PROBABLE CAUSE: "The failure of the crew to select enough thrust to achieve the necessary acceleration. A principal contributory factor was crew fatigue."



Photos

photo of Boeing 707-131F N730JP
N730JP pictured here just prior to its lease to Lloyd Aéreo Boliviano.
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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 Santa Cruz-El Trompillo Airport et Miami International Airport, FL est de 5171 km (3232 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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Boeing 707

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