What was found
DURING MAINTENANCE BASE INSPECTION THE FORWARD SERVICE DOOR WAS FOUND TO BE CORRODED. FRAME 19 AT SILL ATTACHMENT HAS 3 MISDRILLED HOLES. FRAME 17 HAS 2 MISDRILLED HOLES JUST ABOVE STRINGER 16 AT SILL ATTACHMENT. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED FORWARD SERVICE DOOR SILL IAW EMBRAER SRM 51-40-02. REPAIRED MISDRILLED HOLES ON FRAME 19 EO EM53MR-1375. REPAIRED MISDRILLED HOLES ON FRAME 17 IAW EO EM-53MR-1376. AIRCRAFT WAS RETURNED TO SERVICE. ALL PARTS REMOVED: FORWARD SILL PART NUMBER 145-21725-613. FRAME 19-PART NUMBER 145-24145-002. FRAME 17-PART NUMBER 145-22186-611. AIRCRAFT RETURNED TO SERVICE.