American Airlines Is Latest to Find Suspect Parts on Aircraft

American Airlines Group Inc. joined a growing number of carriers around the globe that have discovered improperly certified replacement parts sold by a London-based company on their aircraft.

American disclosed the finding to Bloomberg News late Thursday, hours after US federal aviation regulators issued a warning to airlines and other aviation-industry companies. The carrier didn’t immediately identify the type of parts it found on the planes.

“Through the work of internal audits as well as collaboration with our suppliers, we’ve identified the uncertified components on a small number of aircraft — each were immediately taken out of service for replacement,” ...