What was found
AIRCRAFT IN BASE MAINTENANCE: FOUND CORRODED AREA ON LEFT SILL AT FR66 TO FR68 AND STR 23L MEASURING L=1.122 INCH, W=1.739 INCH, D=0.084 INCH. REPLACED LOWER SILL IN AFT GALLEY AREA IAW A321 SRM 51-72-11-911-001, A321 SRM 51-42-11-801 & DWG #D53480505.