What was found
ORIGINAL INSTALL DATE 8-28-2023. NEW CYLINDERS REMOVED AT 434HRS BY MECHANIC DUE TO RING FLUTTER, RING CHATTER, WASHBOARDING. INCONSISTENT METAL WEAR PATTERN ON THE NITRIDE BORE. DISCOVERED BY BORESCOPE AT 100HR INSPECTION. MANUFACTURER REPLACED CYLINDERS WITH NEW. REPLACEMENT CYLINDERS HAD LYCOMING COMPRESSION RINGS INSTEAD OF SUPERIOR. OIL RING WAS STILL SUPERIOR. P/N SL 36006W-A20P, S/N´S 366W00 000 6027, 366W00 000 6029, 366W00 000 6016, 366W00 000 6030.