What was found
DURING AN IMBV INSPECTION, THE CARGO DOOR LOWER CENTER SILL WAS FOUND TO BE CORRODED BEYOND SRM LIMITS. REMOVED THE CENTER SILL AND INSTALLED NEW SILL IAW EMB 145 SRM, SRM 145/1142 REV 20 CHAPTERS 51-40-02, 51-40-04, 51-40-06, 51-20-01, 51-20-03, AND EMB CPM 51-21-04, 51-21-05 AND 51-21-06. (M)