What was found
WHILE AC WAS IN FOR HVY CK FOUND INTERNAL FUSELAGE CENTER FUSELAGE 1 LH OB SEAT TRACK FOUND CORRODED. MX REPLACED SEAT TRACK PN 170-92570-005 IAW ETD2021-170-034637 AND SRM 51-41-01, 51-42-01, 51-43-01, 51-43-02. SEE AAR NRC# 4500976-2000-0179 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.