A Boeing airliner is designed for 62,000 flying hours. After that, the airframe will no longer be reliable. Fatigue damage is pretty hard to detect. Also, corrosion creeps in.
For comparison, a car's life expectancy is maybe 3,000 hours or so. Airframe quality is way, way higher than car quality.
For comparison, a car's life expectancy is maybe 3,000 hours or so. Airframe quality is way, way higher than car quality.