Engine life is highly dependent on the wear engines face, their operational use, the manufacturing processes they endure, overhaul procedures they are subjected to, and the aircraft they are installed into. While it is typically the manufacturer that sets engine removal times, other factors contribute to their eventual removal. In fact, certain engine types and their related components necessitate the removal or replacement of specific parts. That being said, this blog will cover the importance of aircraft engine removal and when such procedures should be carried out.
One of the main reasons engines need to be removed is when the engine is experiencing sudden stoppage. This is characterized by the rapid or complete stoppage of the engine as a result of one or more of the propeller blades striking an object, causing the RPM to go to zero in less than one complete revolution. It may also occur with the rapid collapse of the landing gear, nosing over the aircraft, or a crash landing. Sudden stoppage can even cause internal damage such as cracked propeller gear teeth, gear train damage, crankshaft counterweights becoming detuned or misaligned, or malfunctioning propeller bearings.
Similarly, sudden reduction in engine speed is another reason one may need to remove an aircraft engine. Reduction in speed can occur as a result of the propeller blades striking an object at a low engine RPM. It may also happen at high RPM, making the damage more severe. If either scenario has taken place, a thorough external inspection of the engine mount, crankcase, and nose section must be performed to determine if any parts are damaged. If the damage cannot be corrected by the maintenance crew, the engine must be removed. This may include the removal of engine oil screens or filters, sump plugs, propellers, and crankshaft.
Another important factor that can lead to engine deterioration is oil contamination. Metal particles in the engine oil screens or the magnetic chip detectors can result in engine failure, thus, necessitating the removal of the engine. Prior to removing the engine, one must determine if the particles are ferrous metals by placing them near a magnet. If the materials are ferrous, this may be cause for concern, resulting in further damage. As such, the engine should be observed for any indication of internal failure or reduced performance.
Other likely reasons that one may want to inspect or remove their aircraft engine include operational problems. These problems include excessive engine vibrations, which is especially common in turbine engines, backfiring or misfiring, which is typical of reciprocating engines, forcefully extending the service life of various components, and internal engine deterioration or damage in turbines. If such issues surface, one must perform a maintenance check and remove the engine. In the case that you find yourself in need of a replacement engine or other parts like wings, cylinder heads, and more, rely on Fulfillment Domain.
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