Safety regulators want to fine Boeing $3.9 million, saying that the company installed wing parts on 133 planes even though it knew the parts were faulty.
Boeing said Friday that all the affected planes in use have been inspected and fixed. A spokesman said the company is not aware of any incidents involving the parts.
The Federal Aviation Administration said Boeing failed to oversee its suppliers. At issue are parts for Boeing 737s known as slat tracks, which sit at the front edge of a plane’s wings and guide the movement of panels called slats. The slats help give planes more lift during takeoffs and landings.
The FAA said the tracks were made brittle during a process in which they received a coating of cadmium and titanium, and that suppliers notified Boeing of the problem.
