As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WORN CAMSHAFT (PN 655384, SN 34962) DISCOVERED DURING CYLINDER CHANGE (LOW COMPRESSION) CYLINDERS NR3 & NR4 INTAKE LOBES ONLY. NEW LIFTERS WERE INSTALLED WITH THE NEW CAMSHAFT AT INSTALLATION. INITIATOR STATES THIS HAS BEEN A PROBLEM MORE THAT A FEW TIMES. MFG PROCESS.