What was found
***WHILE A/C WAS OUT OF SERVICE FOR HEAVY CHECK*** PASSENGER CABIN CF III FLOOR STRUCTURE, CORROSION FOUND AT SPLICE PLATE AREA OF FRAME 89 RBL 12". PASSENGER CABIN CF III FLOOR STRUCTURE, SPLICE PLATE AREA OF FR 89 RBL 12" REPLACED IAW SRM 51-43-03. A/C REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.