As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTINENTAL CYLINDER ASSY PN 653443A13. 2 OUT OF 6 CYLINDERS HAD UNACCEPTABLE LEAKS FROM INTAKE VALVES. ABOUT 1 DROP LIQUID SOLVENT PER MINUTE WITH VALVE SPRINGS INSTALLED. ALSO, VALVE GUIDES ARE HOURGLASS SHAPED. ABOUT .002 INCH SMALLER IN CENTER THAN ON ENDS. THESE ARE ALL OEM NEW PARTS.