As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
31J - THE FOLLOWING WAS FOUND, CABIN SEAT TRACK T/H INBOARD HAS HOLES DRILLED IN TOP THROUGH OUT. FABRICATED NEW SEAT TRACK FROM BAC 1520-792 100 INCHES LONG. INSTALLED NEW SEAT TRACK IAW SRM 51-10-2. REMOVED SEAT TRACK FROM STATION 520-540 AND INSTALLED NEW SEAT TRACK IAW SRM 51-30-02.