What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON LOWER SILL BETWEEN FR 66 TO FR 67 AT LEVEL STR 23L AT AFT GALLEY AREA; REF AEROMAN WO 934679, NRC 2018-343822 ,REPLACED LOWER SILL BTW FR 66 TO FR 68 AT LEVEL STR 23L AT AFT GALLEY AREA I.A.W. SRM A320 51-72-11 AND DRAWING # D53480505