As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON C4 CHECK, CORROSION ON DUMMY RAIL Y503.2 BETWEEN FRAME 12 TO FRAME 16 (LEVEL 2 CORROSION). CORROSION REMOVED FROM DUMMY RAIL ON FRAME 12 TO 16 Y503.2 AND FOUND OUT OF LIMITS AND REPLACED WITH A NEW DUMMY RAIL, REF SRM 51-72-11 PG 1 THRU 2.