What was found
AFT PASSENGER CABIN BTWN FR 67 - 68, -Y 765, FLOOR SUPPORT CORRODED. REPLACED THE FLOOR SUPPORT IAW SRM 51-72-11-911-001, REV 159, DWG D53474250, SHEET 9, ISSUE Q, DWG D38370319, SHEET 3, ISSUE C, DWG D53472800, SHEET 10, ISSUE A, & DWG 53472816, SHEET 2, ISSUE A. (LP: 1874384, AIRCRAFT WAS GROUNDED)