What was found
WHILE PERFORMING HEAVY CHECK MAINT FOUND PASSENGER CABIN FLOOR FR 89 RBL 36, SIDE SKIRT ANGLE WITH GALLEY MOUNT POINT CORRODED ON UPPER SURFACE. REMOVED AND REPLACED ANGLE AT FR89, RBL 36 IAW SRM 51-10-03, SRM 51-75-16 AND SRM 51-40-08. A/C REMAINS IN HEAVY CHECK UNTIL COMPLETION PN-170-86181-005.