What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED AT CABIN FR 84, LBL 20 CROSSBEAM. CAREFULLY CUT OUT DAMAGED AREA AND PERFORMED DETAILED VISUAL INSPECTION OF CROSS BEAM AT FR 84, BETWEEN LBL 29 AND LBL 34. PERFORMED HFEC INSPECTION OF REWORKED AREA OF TOP FLANGE OF CROSSBEAM AT FR 84 IAW NDT PART 1 51-00-00-916-803. FABRICATED THE DOUBLER AND FILLER OF AFFECTED AREAS. APPLIED CHEMICAL CONVERSION COMPOUND AND HIGH SOLIDS EPOXY PRIMER TO REPAIRED PARTS AND REWORKED AREAS. APPLIED A COATING OF THE INTERFACE SEALANT TO THE REPAIRED PARTS. POSITIONED REPAIR PARTS AND SOAKED THE FASTENERS WITH INTERFACE SEALANT IAW SRM 51-40-00/1 AND SRM 51-21-05/1. FILLED THE GAPS AND REWORED AREA WITH HYSOL STRUCTURAL RESIN. RESTORED THE ORIGINAL FINISHING OF THE REPAIR AREA IAW SRM PART II 51-23-06/1 AND E14-359-01.