What was found
WHILE IN HEAVY CHECK WAS REPORTED, FF RT INBD FLOORBEAM IS CORRODED AT FRAME 17. MAINTENANCE R & R FF RT INBD FLOORBEAM IAW SRM 51-40-02, 51-41-02, 51-41-01, C1, C2 FOR WORK ACCOMPLISHED. PN 170-03263-001, TRACK RT. ACFT REMAINS UNTIL HEAVY CHECK IS COMPLETED.