What was found
WHILE IN FOR C CHECK, MAINTENANCE REPORTED HEAVY CORROSION ON INNER DOUBLER FS 1050-1350 LONGERON 31L-31R. REPLACED DOUBLER PER SRM 50-2-0 AND 51-1-20D AND UPS E.O.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE IN FOR C CHECK, MAINTENANCE REPORTED HEAVY CORROSION ON INNER DOUBLER FS 1050-1350 LONGERON 31L-31R. REPLACED DOUBLER PER SRM 50-2-0 AND 51-1-20D AND UPS E.O.