What was found
WHILE AC WAS IN FOR HVY CK FOUND CF1, FLOOR STRUCTURE, CORROSION FOUND ON INBD LH SEAT TRACK BTWN FR19-20. REPLACED SEAT TRACK PN 170-03264-001 IAW SRM 51-41-01, 51-41-02, 51-43-04, 51-43-03, 51-21-01. SEE AAR NRC# 4500913-2000-0207 FOR WORK PERFORMED. AC WAS RTS'ED.