What was found
DURING N317CM C-CHECK AT AIRBORNE (TAMPA), THE FWD CARGO FLOOR SUPPORT BEAM (P/N 451T1604-2) AT STA 548, RBR 41.28 HAS CORROSION. THE DAMAGE WAS REMOVED BY BLEND-OUT PROCESS. THE FLOOR SUPPORT IS FABRICATED FROM 7075-T6511 AL ALLOY EXTRUSION (BAC1506-1898) PER QQ-A-200/11. THERE ARE NO REPAIRS FOR THE SPECIFIC LOCATION IN THE 767-300 SRM AND DUE TO UNDERLYING STRUCTURES, UNABLE TO PERFORM TYPICAL EXTRUDED SECTION REPAIR PER SRM 51-70-12. FLIGHT VEHICLES CONSULTING INC. WAS CONTACTED WITH REPAIR PROPOSAL, AND PERMANENT REPAIR INSTRUCTIONS WERE APPROVED. AAIRCRAFT WAS REPAIRED PER ABX-REA-5331-64861-00.