What was found
***CORROSION*** ON SEAT TRACK @ 4 INCHES FWD OF FR20 TO 1.5 INCHES AFT OF FR20, RBL23, WL151.5. REMOVED AND REPLACED SEAT TRACK FROM FR 20 TO FR 34 RBL 23 WL 151.5 IAW DWG BOMBARDIER PL C02312600 REV E AND ASRP A220BD500- A-J51-42-21-00AAA-078A-A. (LP# 0918617)