What was found
I PREVIOUSLY REPORTED THIS CYLINDER FOR A LOOSE VALVE GUIDE (CONTROL # 2024FA0000818). UPON FURTHER INSPECTION, THIS CYLINDER IS ALSO CRACKED IN THE TARGET AREA OF AD20-16-11. CRACK CONFIRMED BY 10X MAGNIFIER AND FLORESCENT PENETRANT INSPECTION. THIS CYLINDER WAS SUBJECT TO AD 20-16-11 AND HAD BEEN PREVIOUSLY COMPLIED WITH BY RADIUS BLENDING MODIFICATION INSTRUCTIONS IN CONTINENTAL MANDATORY SERVICE BULLETIN #MSB18-08B, BUT THE CYLINDER STILL CRACKED IN THE TARGET AREA OF AD 20-16-11. THIS IS THE SECOND CROSSFLOW CYLINDER I'VE FOUND THAT WAS PREVIOUSLY COMPLIED WITH AD 20-16-11, BUT STILL CRACKED. THE FIRST CYLINDER I FOUND AND REPORTED WAS CONTROL # 2024FA0000942. BOTH CYLINDERS WERE INSTALLED IN THE CYLINDER #5 POSITION, ON BOTH AIRCRAFT.