Crash-aerien 10 JAN 1988 d'un NAMC YS-11-109 JA8662 - Yonago-Miho Airport (YGJ)
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Statuts:Accident investigation report completed and information captured
Date:dimanche 10 janvier 1988
Heure:09:36
Type/Sous-type:Silhouette image of generic YS11 model; specific model in this crash may look slightly different
NAMC YS-11-109
Compagnie:TOA Domestic Airlines
Immatriculation: JA8662
Numéro de série: 2022
Année de Fabrication: 1966
Heures de vol:47209
Moteurs: 2 Rolls-Royce Dart 542-10
Equipage:victimes: 0 / à bord: 4
Passagers:victimes: 0 / à bord: 48
Total:victimes: 0 / à bord: 52
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Yonago-Miho Airport (YGJ) (   Japon)
Phase de vol: Au décollage (TOF)
Nature:Transport de Passagers Nat.
Aéroport de départ:Yonago-Miho Airport (YGJ/RJOH), Japon
Aéroport de destination:Osaka-Itami Airport (ITM/RJOO), Japon
Numéro de vol: 670
Détails:
On takeoff from Miho the co-pilot found the elevator control too heavy to rotate and aborted the takeoff. The aircraft could not be stopped on the runway and overran runway 25 (1500 m long) by 60 m, ending up in shallow water. The aircraft had not been de-iced. With light snow showers, ice or slush might have affected elevator control. Also, the captain had been acting as such on YS-11 aircraft less then 6 months; he was not allowed to leave the controls to the co-pilot during takeoff.

Probable Cause:

It is presumed that this accident occurred because the aircraft failed to stop by the overrun zone after the takeoff abort maneuver was performed at a high speed exceeding takeoff runway speed V2.
The co-pilot aborted the takeoff because he felt the elevator rudder was too heavy and judged that he could not cause the aircraft to take off by steering the elevator rudder. This may be related to the fact that no anti-icing work was performed on the aircraft.
The failure to stop on the runway may have been caused by the high speed at which the aircraft aborted takeoff, slush on the runway surface, and reduced braking effect due to the small weight of the main landing gear.

Accident investigation:

Investigating agency: ARAIC Japan
Status: Investigation completed
Duration: 292 days (10 months)
Accident number: 63-9B
Download report: Final report

Sources:
» Aircraft and Railway Accidents Investigation Commission (ARAIC) Japan
» ICAO Adrep 1/89 (#31)


Opérations de secours
TOA Domestic company rules were revised, ensuring that anti-icing measures are complied with before take-off.

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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 Yonago-Miho Airport et Osaka-Itami Airport est de 214 km (134 miles).

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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