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
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
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
The following instructions cover some of the basic inspections and procedures for rigging and adjusting fuel controls, fuel selectors, and fuel shutoff valves. While rigging the fuel selector, power controls, and shutoff valve linkages, follow the manufacturer’s step-by-step procedure for the particular aircraft model being rigged. The cables should be rigged with the proper tension … Read more
The following procedure is typical of those used for installing a horizontally opposed engine after the accessories are mounted on the engine. Insert engine mounting bolts into the engine mount and slide the shock mounts onto the bolts so that the flat surface of the shock mount is flush with the engine mounting pad. 1. … Read more
Removal of an Auxiliary Power Unit (APU) 1. Open APU compartment access door latches and open door. Install door support rods. Open circuit breakers and switches as needed. [Figure] 2. Remove lower support shroud. 3. Disconnect APU harness, APU starter motor, and APU generator plugs from receptacles in upper shroud. 4. Disconnect APU generator control … Read more
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