The U.S. aircraft manufacturer said the issue would not pose an immediate safety risk.
The company said Monday that Boeing’s quality inspections of previously revealed manufacturing defects in its 787 Dreamliner found similar problems in other parts of the jet aircraft.
Boeing said earlier this month that studies of 787 production defects would take longer than expected, which could affect the U.S. aircraft manufacturer’s ability to deliver jet aircraft to customers by December.
On Monday, Boeing inspected 787 more assembled aircraft and found that some parts of the fuse were not smooth enough.
The company noted that the engineering specifications in question were equal to the width of human hair.
Boeing also said the issue would not pose an immediate security risk.
The specific reason behind the extensive quality-control tests, and the fact that they now cover the larger parts of the fuse than some sections around the jet wall, the Wall Street Journal previously reported.
The U.S. Federal Aviation Administration (FAA) said in a statement Monday that Boeing “continues to engage with Boeing through established operational safety and production oversight processes established to properly address any issues that may arise.”
An FAA official told Reuters news agency that “none of the issues raised recently were considered immediate security concerns” and that it “takes these quality concerns seriously and continues to engage in discussions about any mitigation.”