The following paragraphs outline the most common reasons for removing and replacing an engine. Information to aid in determining engine conditions that require removal is included; however, in every case, consult applicable manufacturer’s instructions as the final authority in establishing the basis for engine replacement. Engine or Component Lifespan Exceeded Engine life is dependent upon … Read more
For protection, engines are sealed in plastic or foil envelopes and can be packed in a wooden shipping case or in pressurized metal containers. The engine is lowered into the shipping container so that the mounting plate can be bolted into position. The protective envelope is attached directly to the base of the shipping case. … Read more
When the new or overhauled engine is ready to be hoisted for installation, move the engine stand as close as possible to the nacelle in which the replacement is to be installed. Then, attach the sling to the engine and hook the hoist to the sling. Take up the slack until the hoist is supporting … Read more
Since turbine engine ignition systems normally operate only during the engine-starting cycle, they are generally more reliable and require less maintenance than reciprocating engine ignition systems. Unlike reciprocating engine ignition systems, turbine engine ignition systems do not require ignition timing to occur at a precise point in the engine operating cycle. The system is used … Read more
Before starting to work on the aircraft or reciprocating engine, always be sure that the magneto switch is in the off position. Aircraft engines can be started accidentally by turning the propeller if the magneto switch is on. Check to see that all fuel selectors or solenoid-operated fuel shutoff valves are closed. The fuel selector … Read more
Before an engine is placed in temporary or indefinite storage, it should be operated and filled with a corrosion-preventive oil mixture added in the oil system to retard corrosion by coating the engine’s internal parts. Drain the normal lubricating oil from the sump or system, and replace with a preservative oil mixture according to the … Read more
The engine is installed facing aft with the propeller shaft approximately 39° above horizontal. The engine is supported by the engine mount, which is bolted to the fuselage structure. The installation of the engine provides for ease of maintenance by allowing easy access to all accessories and components when the engine access doors are opened. … Read more
Carburetors use the principles of airflow and pressure differential to meter fuel and deliver the proper air-fuel mixture to the engine. Understanding how the venturi, throttle valve, and fuel discharge system work together is essential to understanding carburetor operation. Venturi Principles The carburetor must measure the airflow through the induction system and use this measurement … Read more
Oil Tank The oil tank, constructed of welded aluminum, is serviced (filled) through a filler neck located on the tank and equipped with a spring-loaded locking cap. Inside the tank, a weighted, flexible rubber oil hose is mounted so that it is repositioned automatically to ensure oil pickup during all maneuvers. A dipstick guard is … Read more
If a QECA is being removed, the engine mount accompanies the engine. The mount remains on the aircraft if only the engine is being removed. Before the engine can be freed from its attachment points, a sling must be installed so the engine’s weight can be supported with a hoist when the mounting bolts are … Read more
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