As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED 6 CERMICHROME CYLINDER REBUILT UNITS WITH 643767 GUIDES. 120 SMOA. COMPRESSION LEAK ON TWO CYLINDERS. PULLED ALL 6 AND RETURNED UNITS TO ECI. THEY DIAGNOSED AS JUST WORN OUT. THEY REPAIRED SAME AND SUGGESTED FULL FLOW LIFTERS AND DRILLED ROCKERS TO 'HELP ALLEVIATE FUTURE PROBLEMS'.