As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HR INSPECTION. WE ARE USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HRS. 3 CRACKED CYLINDER WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)