What was found
HN00221315 DISCREPANCY:UPON REMOVAL OF THE SERVICE DOOR SILL ANGLE, FOUND ADDITIONAL CORROSION ON THE SERVICE DOOR SILL. CORRECTIVE ACTION :UPON FURTHER EVLUATION, FOUND SERVICE DOOR SILL TO BE OUT OF LIMITS DUE TO CORROSION BEING ON MORE THAN 50% OF THE PART AND DEEP CORROSION PITTING REQUIRING REPLACEMENT. LOCATED AND DRILLED UP NEW SERVICEABLE SERVICE DOOR SILL P/N SH670-31996-3 IAW CRJ 700 SRM 51-40-11-001-001-A01. INSTALLED SERVICEABLE SERVICE DOOR SILL P/N SH670-31996-3 IAW CRJ 700 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01