Des PB d'ajustage et de finition récurrents, visibles et détectés.
Based on what the report found, that represents hundreds of planes or the vast majority of the Dreamliner fleet that could contain issues with its vertical tail fin.
Investigators say the issue was document at planes assembled in both Boeing Dreamliner facilities in Everett and Charleston, S.C.
“Capture and control investigation showed this depression could be present on both sides (LHS and RHS) and from both manufacturing facilities,” the document said.
The focus of their concern appears to be with final assembly of the plane.
For some reason, workers removed shims that were in place before the final installation of fasteners.
It appears those fasteners were supposed to remain, but were instead discarded. Inspectors now want to know why that happened, and what the long-term effects of the missing shims could be.