As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FAILED ON TAKE OFF, AIRCRAFT WAS AIRBORN. OWNER WAS ABLE TO MAKE A SAFE LANDING. FOUND ENGINE TO HAVE NO COMPRESSION. REMOVED ROCKER BOX COVERS, FOUND ONLY ONE EXHAUST VALVE WOULD MOVE ON NR1 CYLINDER. CAMSHAFT BROKE BETWEEN EXHAUST AND INTAKE ON NR1 CYLINDER.