What was found
DURING OVERNIGHT MAINTENANCE OPERATION IN CINCINNATI/NORTHERN KENTUCKY INTERNATIONAL AIRPORT (CVG) IN HEBRON, KY, THE MAINTENANCE TEAM IDENTIFIED 5 AREAS OF LIGHT CORROSION PITTING IN THE FUSELAGE SKIN (P/N MM690-35146-013) AT THE AFT DRAIN MAST. THE DAMAGE IS LOCATED BETWEEN FS1031.00-FS1051.30 FROM STRINGER 27 TO 26R. THE CORROSION DAMAGED WAS MEASURED TO BE 0.002Ï¿½, 0.0025Ï¿½, 0.003Ï¿½, 0.001Ï¿½, AND 0.0025Ï¿½ DEEP / C/W PERM REPAIR FOR CORROSION UNDER AFT DRAIN MAST IAW EA 22-C9-53-0613 REV.A AND REINSTALLED AFT DRAIN MAST IAW CRJ900 AMM 38-32-12-400-801-A01 CHECKS GOOD.