On May 28, 1975, a NAMC YS-11 (registration JA8680) operated by TOA Domestic Airlines was involved in an aviation accident near Osaka-Itami, Japan during landing or approach. No fatalities were reported. Investigators recorded the probable cause as: A hydraulic oil leak caused by a loose connection of the hydraulic oil line in the left flap well. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.
A flight from Osaka-Itami returned for an emergency landing after technical problems. On touchdown, a tire burst caused the aircraft to veer off runway 32R, crossing soft ground and a drainage ditch before stopping. All 22 occupants evacuated safely; the aircraft was damaged beyond repair.
Incident
Shortly after departing from Osaka-Itami Airport, the crew of flight JD621, bound for Okinoshima (Oki Island), reported technical problems to air traffic control and received clearance to return for an emergency landing. The aircraft touched down on runway 32R. During the landing roll, a tire on the right main landing gear burst, leading to a loss of control. The airplane veered to the right, left the runway, and contacted soft ground. It subsequently passed over a drainage ditch before coming to rest. All 22 occupants were evacuated safely. The aircraft sustained damage beyond repair.
Probable Cause
According to the official investigation, the probable cause of the incident was a hydraulic oil leak resulting from a loose connection of the hydraulic oil line in the left flap well.