As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS IN FOR HVY CK FOUND AFT FUSELAGE 3 LH FLOOR STRUCTURE LH SEAT TRACK CORRODED BTWN FR 74-FR84. MX REPLACED SEAT TRACK PN 170-86081-005 IAW SRM 51-43-03 SEE AAR NRC# 4500976-1000-0078 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.