As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE ANNUAL INSPECTION A DISCREPANCY WAS MADE TO PULL OFF GROSS WEIGHT KIT RIGHT WING TO REMOVE WING STRAP OVER SPAR DUE TO A GAP AT ONE OF THE TAPPERED ENDS ON THE STRAP. WHEN REMOVED THE MECHANIC NOTICED A DRILL HOLE OVER THE WING SPAR, UPON FURTHER INVESTIGATION USING A BORESCOPE IT WAS FOUND THE THE SPAR WAS IN FACT DRILLED THRU BY MISTAKE AT THE TIME THE KIT WAS BEING INSTALLED.