What was found
DURING HEAVY MAINTENANCE, REFERENCE AEROMAN NR 2020-383928. CORROSION LOWER SILL LOCATED FR 66 AT LEVEL STRINGER 23RT SIDE OF AFT GALLEY. RESOLVED ON W/O: 1075575 TASKCARD: NR-00032. R & R (PREVIOUSLY REPAIRED) LOWER SILL LOCATED BETWEEN FR 66 TO FR 68 AT LEVEL STRG 23R AFT GALLEY AREA, IAW A320 SRM 51-72-11-911-001 AND DRAWING D53480505, E53474250.