What was found
WHILE AC WAS IN FOR HEAVY CHECK, CORROSION FOUND ON FWD FUSELAGE FLOOR STRUCTURE RT DOUBLER PN 170-05663-605 AT FR 13. REPLACED IAW SRM 51-41-02, 51-43-02, SEE AAR NRC NR 4500827-2000-0058 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.