In the proposed directive, the FAA said that multiple nonconformances were found during the assembly and installation of the forward pressure bulkhead. More specifically, the docu

The issue involves tiny gaps that could be present in the plane's dome-shaped forward-pressure bulkhead, which is located at the nose of the fuselage and serves as a barrier for the pressurized interior cabin.

The Federal Aviation Administration plans to require airlines to inspect 787 forward-pressure bulkheads to address a concern involving gaps caused by manufacturing defects.