What was found
DURING ROUTINE 100 HR INSPECTION FOUND COMPRESSION TO BE 40/80 ON CYLINDER #4 AND INSPECTED FURTHER. FOUND THAT VALVE WAS NOT SEATING PROPERLY. VALVE SEAT WAS BELL MOUTHED, VALVE PUSHES IN AN OUT ON A CURVE RATHER THAN STRAIGHT, WORN ONLY ON ONE SIDE. IMPROPER SEAL WAS ALLOWING BLOW BY AND CAUSING LOW COMPRESSIONS. TIME SOH ON ENGINE IS 385.6 AND TOTAL TIME IS12,634.5. ENGINE ORDERED FROM WESTERN SKYWAYS, DATE OF MANUFACTURING FEB 19 2025 UNDER WORK ORDER W062125.