<h3><font color = "blue">Continental: TSIO 520NB; Cracked ECI Cylinders; ATA 8530</font> </h3>
<p>An unknown submitter writes, “418.6 hours <em>(have passed) </em>since compliance with AD2004-08-10 on <em>(thisaircraft's) </em>ECI cylinders <em>(P/N TISN71.2BCA-221 </em>). The left engine's number two...and the right engine's number four cylinders were both found cracked through, from the upper plug hole to the exhaust valve. Both cylinders have identical cracks on relatively new heads.” </p>