Boeing Co. has expanded inspections of newly produced 787 Dreamliners after finding a previously disclosed manufacturing defect in sections of the jet where it had not previously been detected, the Wall Street Journal reported on Monday.

U.S. air-safety regulators and Boeing engineers agree the newly discovered problem does not pose an imminent safety hazard, the WSJ reported, citing industry and government officials.

However, the new issue will likely ramp up a Federal Aviation Administration review of 787 production safeguards, the WSJ added, citing one of the officials.

Boeing (BA) said in December it was reducing production of its 787 for the fourth time in 18 months after posting zero deliveries in November as production flaws compounded delays from the COVID-19 crisis.

The planemaker did not immediately respond to a request for comment.