What was found
***CORROSION*** ON FWD END OF SEAT TRACK @ FR20, RBL43, WL151. REMOVED CORROSION AND EVALUATED OUT OF LIMITS, REMOVED AND REPLACED SEAT TRACK AT RBL 43 WL 151 FROM FR20 TO 30+9" IAW A220 ASRP BD500-A-51-42-21-00AAA-078A-A AND BOMBARDIER DWG C02312600 REV E. (LP# 0945320)