What was found
WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON FWD FUSELAGE, FLOOR SUPPORT DOUBLER UPPER SURFACE AT FR13, RT SIDE. FWD FUSELAGE FLOOR SUPPORT DOUBLER AT FR13, RT SIDE REPLACED IAW E170 SRM 51-41-02 AND 51-43-02.