Compression Test on a Piper Aircraft Lycoming Engine Research Paper

Compression Test on a Piper Aircraft Lycoming Engine - Research Paper Example When doing this correction, the propeller should be rotated to make sure that the piston does not lie at the Top Dead Centre (TDC) so that the valve does not strike the top of the piston in the engine.The engine should be rotated to ensure reseat of valves in a correct manner before a compression recheck is done.   The top spark plug from each cylinder is removed before the compression check is performed. This is done by connecting the pressure regulator and the adapter to cylinder number two and the propeller is turned on to ensure that the piston was at TDC on the compression stroke of the engine. The pressure gauge was set at 20 psi following AC 43.13 recommendations to make sure that we achieve the TDC.The gauge was turned to 80 psi following the manufacturers and the AC 43.13 recommendations.The first gauge reading was 80 psi and the air gauge reading was 76 psi. The prop was moved back and forth to ensure proper placement during double checking on the readings obtained.Howeve r, leakages occurring after recheck compel for correction of pressure readings obtained. This correction can be done by placing a fiber drift on the engine rocker arm located directly over the valve stem and the drift is tapped several times using a hammer in orde to remove any foreign materials between seat and valve face. Pressure losses exceeding 25% of the applied pressure is an indication of cylinder defection, but this is subject to operating the engine for a time period of at least three munities to enable.