What was found
(CAN) 6 OUT OF 8 CYLINDERS, TWIN APPLICATION, INSTALLED WERE PROCURED FROM MFG AND HAD BEEN FITTED WITH STANDARD PN RINGS. BROKEN RINGS FOUND AFTER EXCESSIVE OIL VENTING FROM LT ENGINE AND SUBSEQUENT LEAK DOWN CHECK. LEAKDOWN CHECK ON RT ENGINE FOUND 1 LOW CYLINDER AS WELL WITH ANOTHER BROKEN RING. ALL MFG CYLINDERS WITH CERMINIL COATING WERE REMOVED. QUOTE FROM THIS MFG WEBSITE "PLASMA FACE PISTON RINGS FOR USE WITH CERMINIL PROCESS CYLINDER BORES, AND SERVICE INSTRUCTION 94-4-1, PISTON RING SETS APPLICATIONS, FITTING INSTRUCTIONS AND REF" ALL 6 CYLINDERS WERE SERVICED FOR RING WITH PROPER RINGS FOR CERMINIL CYLINDERS AND PISTON WEAR CHECK AND BORE RE HONE.