What was found
DOOR 4L SILL UPPER SURFACE, HAT CHANNEL HAS CORROSION ON LOWER SURFACE, STA 1664, MARKED. REMOVED AND REPLACED HAT CHANNEL IAW SRM 51-40-02 AND BAC DWG146N8722 REV N.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DOOR 4L SILL UPPER SURFACE, HAT CHANNEL HAS CORROSION ON LOWER SURFACE, STA 1664, MARKED. REMOVED AND REPLACED HAT CHANNEL IAW SRM 51-40-02 AND BAC DWG146N8722 REV N.