Crash-aerien 28 NOV 1972 d'un McDonnell Douglas DC-8-62 JA8040 - Moskva-Sheremetyevo Airport (SVO)
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Statuts:Accident investigation report completed and information captured
Date:mardi 28 novembre 1972
Heure:19:51
Type/Sous-type:Silhouette image of generic DC86 model; specific model in this crash may look slightly different
McDonnell Douglas DC-8-62
Compagnie:Japan Air Lines - JAL
Immatriculation: JA8040
Numéro de série: 46057/474
Année de Fabrication: 1969
Moteurs: 4 Pratt & Whitney JT3D-
Equipage:victimes: 9 / à bord: 14
Passagers:victimes: 52 / à bord: 62
Total:victimes: 61 / à bord: 76
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Moskva-Sheremetyevo Airport (SVO) (   Fédération de Russie)
Élévation des lieux de l'accident: 192 m (630 feet) amsl
Phase de vol: En montée initiale (ICL)
Nature:Transport de Passagers Intern.
Aéroport de départ:Moskva-Sheremetyevo Airport (SVO/UUEE), Fédération de Russie
Aéroport de destination:Tokyo-Haneda Airport (HND/RJTT), Japon
Numéro de vol:JL446
Détails:
A McDonnell Douglas DC-8-62 passenger plane, JA8040, was destroyed when it crashed on takeoff from Moscow's -Sheremetyevo Airport (SVO), Russia.
Five of the 14 crew members and ten of the 62 passengers survived the accident.
JAL flight JL446 was a scheduled international flight from Copenhagen (CPH), Denmark to Tokyo-Haneda (HND), Japan with an en route stop in Moscow.
The flight to Moscow was uneventful and the airplane landed at 18:17. After servicing of the aircraft startup and taxi clearance was received at 19:38. JL446 was cleared for takeoff from runway 25 at 19:49.
On takeoff the DC-8 climbed to 100 m with a supercritical angle of attack and lost height abruptly. It hit the ground and burst into flames.

Probable Cause:

PROBABLE CAUSE:
The cause of the disaster to aircraft DC-8-62 JA-8040 resided in the fact that during take-off and following attainment of the safety speed V2, the crew put the aircraft into a supercritical angle of attack which resulted in loss of speed and altitude.
The aircraft's assumption of supercritical angles of attack was the consequence of one of the following circumstances:
a) inadvertent extension of the spoilers in flight, leading to a fall in the maximum value of the lift ratio and an increase in drag;
b) loss of control of the aircraft by the crew in conditions associated with malfunctioning of the No. 1 or No. 2 engine consequent upon possible ice formation on the engine intake at a time when the de-icing system was switched off.
The anomalies in the functioning of the engines observed by the crew and other witnesses may have arisen after the aircraft had assumed a supercritical angle of attack with the spoilers extended.

Sources:
» Flight International 05 November 1977 (1342)
» ICAO Circular 132-AN/93 (22-26)


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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 Moskva-Sheremetyevo Airport et Tokyo-Haneda Airport est de 7438 km (4649 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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