As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) TEN HOURS AFTER COMPLIANCE OF FAA AD 97-15-01 (SS BY FAA AD 97-21-02), SIDE LOADING OF THE PISTON, THE AIRCRAFT OWNER COMPLAINED TO THE OVERHAUL SHOP OF ENGINE VIBRATION AND POWER LOSS. INSPECTION OF THE OVERHAULED ENGINE REVEALED EXCESSIVE AND PREMATURE CYLINDER BARREL WEAR. THESE CYLINDERS WERE FACTORY "NEW" AND WERE STAMPED "P" IDENTIFYING THEM AS BEING INSPECTED BY THE FACTORY IN ACCORDANCE WITH CONTINENTAL SB 97-10 (SB 97-10A).