As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACFT IN HEAVY CHECK MAINT FOUND CORROSION/ CHAFING ON RT OUTBD PAX SEAT TRACK FRAME 23-34/43. REMOVED AND INSTALLED NEW SEAT TRACK AT FR 23/34 TO 43 REF SRM 51-40-08. RESTORED SURFACE PROTECTION REF SRM 51-23-06. APPLIED CIC REF CPM 51-25-00. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.