<p><strong><font color = "blue">ECI: Cylinder; Blown Cylinder Head; ATA 8530</font> </strong></p>
<p><em>(A Cessna 402 airplane is “attached” to this TSIO-520E Continental engine.) </em></p>
<p>An A&P mechanic writes, “The number three cylinder on the left engine cracked completely around the head, approximately 1.25 inches above the base of the head. The crack was completely around the circumference of the head, and allowed the head to slip off the barrel half and inch. <em>(Having occurred during flight...), </em>the prop was feathered, the engine shut down, and a safe landing was made. There was no other damage to the engine or aircraft. This cylinder was on its third run. It had been previously re-barreled and bored .010 oversize at the last overhaul <em>(Cylinder P/N ECI 87721-06). </em></p>