What was found
LIGHT CORROSION ON SEAT TRACKAT FUS. STA. 409.00 TO FUS. STA.409.00 + 96; RBL 9 R (C-CHECK) RO 4/22/2020 REMOVED CORROSION FROM SEAT TRACK F.S. 409.00TO 409+128 RBL 9 IAW CRJ200 SRM. PERFORMED U.T. THICKNESS CK IAW BOMBARDIER CRJ200 NDTM. ORIGINAL WAS .100. REMAINING IS .075. CORROSION IS OUT OF LIMITS IAW CRJ200 SRM. LOCATED AND DRILLED NEW SEAT TRACK P/N 6656-144 IAW CRJ2OO SRM TEMP. REV. 51-42. TREATED NEW SEAT TRACK IAW CRJ200 SRM. REMOVED CORRODED SEAT TRACK AND REPLACED WITH NEW P/N 6656-144 IAW CRJ200 SRM