Share the QR code with wechat scanning code < / P > < p > to friends and circles of friends < / P > < p > in September last year, the shipment of Boeing 787 dream model was interrupted due to production defects, and the shipment was resumed only in March this year. In May, the shipment was suspended again due to the investigation of the U.S. regulator. The regulator said in September that it may last at least until the end of October < p > < / P > < p > another accident happened to Boeing. The 787 dream model broke out with quality problems before it was shipped again. This time, it's not because of Boeing's own problems, but from aircraft parts suppliers < p > on Thursday, Eastern time, Boeing disclosed that in the past three years, titanium parts of some 787 dream models were improperly produced. They came from Leonardo, the largest parts supplier of the model and the Italian arms giant. Leonardo purchased parts from the Italian company manufacturing processes specification (MPS), which is no longer Leonardo's supplier < p > the above defective parts include the joints of the floor beam that helps fix part of the fuselage, as well as the joints, gaskets, brackets and hooks inside other assemblies. The Federal Aviation Administration (FAA) said that this quality problem did not immediately affect flight safety. Boeing also said that the investigation was still ongoing and it had been determined that it would not immediately create flight safety concerns for aircraft in service < p > however, Boeing said that the 787 Dreamliner that has not yet been shipped needs to be reloaded before shipment, and any aircraft action needs to be checked by Boeing's routine review process and confirmed by FAA < p > on Thursday, Boeing fell more than 2% and closed down nearly 2%, while Leonardo listed in Milan closed down about 7% < p > the problems that broke out on Thursday undoubtedly made the 787 dream model worse < p > last September, FAA said that it was investigating the production defects of this model. It was not until March this year that Boeing resumed shipment of the model. However, in May, FAA questioned Boeing's calibration method, and the model was forced to suspend shipment again. In July, the FAA said that there was a production quality problem near the nose of some dream models, which Boeing must solve before shipping to customers < p > in September, the media also said that the FAA rejected Boeing's inspection proposal, and Boeing may have to suspend the shipment of 787 dream models until at least the end of October. FAA spokesman said at that time that FAA would continue to interact with Boeing and would not sign the verification certificate unless FAA's safety experts were satisfied < p > according to the FAA letter in August this year, FAA is investigating a series of possible quality control errors of 787 dream model. If it believes that Boeing fails to follow the company's own or FAA's guidelines, it allows unqualified personnel to sign on the quality verification certificate for confirmation. In early September, Boeing denied some FAA allegations in its reply, saying that law enforcement action was not necessary < p > a Boeing spokesman declined to comment on the above investigation, saying only that Boeing is committed to cooperating with the FAA to improve compliance and safety