When an aviation piston engine is parked for a long time, careful maintenance is required to ensure its performance and life. The following are the main points of long-term parking maintenance of aviation piston engines:
First, fuel system maintenance
Emptying fuel system:
Before long-term parking, the fuel in the fuel system should be drained to prevent fuel deterioration or sediment blocking the fuel system.
Cleaning fuel system:
If conditions permit, the fuel system can be cleaned to remove carbon deposits and impurities and keep the fuel system unimpeded.
Second, oil system maintenance
Change the oil:
Before long-term parking, the lubricating oil should be replaced and the specified grade of lubricating oil should be used. At the same time, replace the oil filter element to ensure that the oil system is clean.
Oil seal storage:
If it is determined that the aircraft will be parked for 30 days or more, the engine should be oil sealed for preservation. This involves draining the oil, adding the oil seal oil, running the engine to normal oil temperature, then injecting the oil seal oil into the cylinder, and installing a moisture-proof plug and desiccant.
Third, ignition system and electrical system maintenance
Check the ignition system:
Before long-term parking, the ignition coil, high voltage wire, spark plug, etc. should be checked to ensure that the ignition system is reliable.
Disconnect the power supply:
During long-term parking, the power supply to the engine should be disconnected to prevent moisture or short circuit in the electrical system.
Fourth, cooling system maintenance
Check the cooling system:
Before long-term parking, check whether the water tank, water pump, radiator, etc. are in normal operation to ensure that the cooling system has no leakage.
Drain coolant:
Before long-term parking, it is recommended to drain the coolant to prevent the coolant from deteriorating or corroding the cooling system.
Fifth, intake and exhaust system and dust maintenance
Check the intake and exhaust system:
Before long-term parking, check whether the intake and exhaust system is smooth to prevent dust and impurities from entering the engine.
Maintenance air filter:
During long-term parking, ensure that the air filter is tightly closed to prevent dust and impurities from entering the engine.
Sixth, the body and accessories maintenance
Clean the body:
Before long-term parking, the engine body should be cleaned to remove oil and dust.
Check the attachment:
Check whether the engine accessories (such as starter, generator, etc.) are fixed firmly, and whether the connection line is intact.
Seventh, regular maintenance and inspection
Regular inspection:
During long-term parking, the engine should be inspected regularly, including appearance inspection, system inspection, etc., to ensure that the engine is in good condition.
Record maintenance information:
Record the information about each maintenance, including the maintenance date, maintenance content, and replacement parts, for future reference.
Eighth, other precautions
Avoid humid environments:
During long-term parking, the engine should be avoided in a humid environment as far as possible to prevent rust or corrosion of parts.
Prevent foreign objects from entering:
During long-term parking, foreign bodies should be prevented from entering the engine to avoid damage.
Follow the operating procedures:
When carrying out long-term parking maintenance, the operating procedures and maintenance precautions recommended by the engine manufacturer should be followed.
In summary, the long-term parking maintenance of aviation piston engines needs to consider a number of aspects, including fuel system, oil system, ignition system and electrical system, cooling system, intake and exhaust system and dust maintenance, body and accessories maintenance. Through careful maintenance measures, you can ensure that the engine still maintains good performance and life after long-term parking.
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