What was found
DURING ROUTINE MAINTENANCE, CORROSION WAS DISCOVERED ON R2 PAX DOOR SILL FRAME 66 STR 23RH ; R & R R2 DOOR SILL FWD CWNTER & AFT SEALS & R/H TRIPLE BEAM LOCATED , DRILLED, DEBURRED, TREATED, PRIMED , INSTALLED & PART MARKED NEW DOOR SILL. INSTALLED R/H TRIPLE BEAM FWD CENTER AFT SEALS IAW A320 SRM 53-41-14, 51-42-11, 51-44-11, 51-72-11.