Delta Says Some Aircraft Flew With Uncertified Engine Parts

Delta Air Lines Inc. says some of its aircraft have flown with engines using improperly documented components, a disclosure indicating the extent to which parts linked to a British distributor have been sold globally.

Suspect components were found on only one engine of the planes that were flown, a company spokesman said Tuesday, declining to quantify exactly how many aircraft and engines were impacted. The information comes from a new assessment of Delta’s ongoing internal investigation into the uncertified parts, which it first disclosed on Monday.