What was found
DURING A MBV INSPECTION, THE CARGO DOOR CUT OUT LOWER SILL WAS FOUND TO BE CORRODED. REMOVED THE SILL AND REPLACED WITH A NEW SILL PN 145-25480-603 IAW EMBRAER SRM CHAPTERS 51-20-01, 51-20-03, 51-40-02,51-40-06, 51-40-09 AND EMBRAER CPM CHAPTERS 51-21-04, 51-21-05 AND 51-21-06. AIRCRAFT RETURN TO SERVICE.