Boeing Co said it stopped work more than a month ago on two sections for its 787 Dreamliner model after wrinkles were found in the composite-material fuselages supplied by Italy's Alenia Aeronautica, Bloomberg reported.
The flaws were found on 23 airplanes, and Boeing ordered work to stop on June 23, the news agency quoted a spokeswoman for the company as saying.
A solution has been designed and patches should soon be applied to all the planes built so far, she said.
Industry blog FlightBlogger said production was halted because of wrinkles in the fuselage skin caused by flaws in subcomponents of the one-piece composite barrel.
The blog cited a letter, signed and dated June 23, on a Boeing letterhead. On June 23, Boeing postponed the first test flight of the 787 for a fifth time.
Boeing could not immediately be reached for comment.
Alenia Aeronautica, a unit of Italy's aerospace and defense company Finmeccanica SpA , is supplying 14 percent of the 787's fuselage. It declined to comment.
Alenia Aeronautica is a key player in the development of the 787 aircraft's main structure and builds carbon fiber pieces for the aircraft.
At 1225 GMT Boeing shares in pre-opening trade were 0.8 percent lower at $46.25. Finmeccanica was up 0.09 percent at 11.03 euros.
(Reporting by S. John Tilak in Bangalore; Additional reporting by Nigel Tutt in Milan; Editing by Derek Caney, John Stonestreet)