As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE COMPLYING WITH SB-AG-37 (HORIZ STABILIZER SPAR) 6 RIBS IN THE LEADING EDGE WERE FOUND TO HAVE IMPROPERLY SHOT RIVETS WHICH COULD BE SEEN AS SMOKING RIVITS. RIVETS WERE FOUND SPACED TO CLOSE TO EDGE, WRONG GRIP LENGTHS, DOUBLE DRILLED HOLES; HOLES DRILLED INTO RADIUS OF RIB, DOUBLE DRILLED FIGURE 8 HOLE DRILLED INTO THE FWD SPAR. ALL DAMAGE PHOTOGRAPHED AND AVAILABLE AT THE REPAIR STATION.