
Détails:
TWA Boeing 707 N748TW and Eastern Constellation N6218C approached Carmel VORTAC at FL110 resp. FL100. Due to an optical illusion caused by the up-slope effect of cloud tops, the Eastern 1st officer thought they were on collision course with the TWA jet. He pulled up the Constellation. The reaction of the TWA crew was to roll to the right, followed by a left roll down. Both aircraft collided. The Boeing made a safe landing.
PROBABLE CAUSE: "Misjudgement of altitude separation by the crew of EA853 because of an optical illusion created by the up-slope effect of cloud tops resulting in an evasive manoeuvre by the EA853 crew and a reactionary evasive manoeuvre by the TW42 crew."
| Statuts: | Accident investigation report completed and information captured |
| Date: | samedi 4 décembre 1965 |
| Heure: | 16:19 |
| Type/Sous-type: |  Lockheed L-1049C Super Constellation |
| Compagnie: | Eastern Air Lines |
| Immatriculation: | N6218C |
| Numéro de série: | 4526 |
| Année de Fabrication: | 1953 |
| Heures de vol: | 32884 |
| Moteurs: | 4 Wright R-3350 (972TC18DA) |
| Equipage: | victimes: 1 / Ã bord: 5 |
| Passagers: | victimes: 3 / Ã bord: 49 |
| Total: | victimes: 4 / Ã bord: 54 |
| Dégats de l'appareil: | Perte Totale |
| Conséquences: | Written off (damaged beyond repair) |
| Lieu de l'accident: | North Salem, NY ( Etats-Unis d'Amérique)
|
| Phase de vol: | En vol (ENR) |
| Nature: | Transport de Passagers Nat. |
| Aéroport de départ: | Boston-Logan International Airport, MA (BOS/KBOS), Etats-Unis d'Amérique |
| Newark International Airport, NJ (EWR/KEWR), Etats-Unis d'Amérique | |
| Numéro de vol: | EA853 |
TWA Boeing 707 N748TW and Eastern Constellation N6218C approached Carmel VORTAC at FL110 resp. FL100. Due to an optical illusion caused by the up-slope effect of cloud tops, the Eastern 1st officer thought they were on collision course with the TWA jet. He pulled up the Constellation. The reaction of the TWA crew was to roll to the right, followed by a left roll down. Both aircraft collided. The Boeing made a safe landing.
Probable Cause:
PROBABLE CAUSE: "Misjudgement of altitude separation by the crew of EA853 because of an optical illusion created by the up-slope effect of cloud tops resulting in an evasive manoeuvre by the EA853 crew and a reactionary evasive manoeuvre by the TW42 crew."
Accident investigation:

|
Sources:
» ICAO Circular 88-AN/74 Volume III (123-136)Photos
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 Boston-Logan International Airport, MA et Newark International Airport, NJ est de 320 km (200 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.
La distance entre Boston-Logan International Airport, MA et Newark International Airport, NJ est de 320 km (200 miles).
Accident location: Global; accuracy within tens or hundreds of 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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