As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 4 LT DUMMY SEAT TRACK INSP OF GAP REQUIRES INSERT REPLACEMENT. REMOVED NR 4 LT DUMMY SEAT TRACK FROM FRAME 54 - 54.2 IAW SRM 51-40-21. R & R INSERT MADE ON T15 117578 & SRM 53-15-16. REINSTALLED DUMMY SEAT TRACK IAW SRM 51-40-21 & SRM 53-15-16 CAT A MAJOR REPAIR.