Incident Description
During the takeoff roll, the tread of the left number 2 main tire detached from its casing. A portion of the separated tread struck the number one engine, causing foreign object damage. Another part of the tire penetrated the left wing. The flight crew responded by reducing power on the number one engine to manage vibrations, dumping fuel, and returning to the departure airport. A precautionary landing was conducted, after which passengers disembarked and were transported by bus to the terminal.
Aircraft Damage
The number one engine sustained foreign object damage from the tire debris. The lower wing skin adjacent to the left main landing gear wheel well was punctured, resulting in holes.
Investigation Findings
Laboratory examination of the tire revealed that the failure originated from fatigue caused by overheating, which resulted from the tire having been retreaded multiple times.