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27 Cards in this Set
- Front
- Back
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What indications are given in the event of a leaking or open primer while the engine is running? |
The engine will not idle properly |
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A cold cylinder is found when troubleshooting a running engine. What does this indicate? |
No combustion in that cylinder |
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When pulling a propeller through, a hissing sound is heard, indicating valve blow by. What procedure should be performed next? |
A compression check should be performed to identify the faulty cylinder. |
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What is the purpose of performing a compression check? |
To determine if the valves, pistons, and rings are sealing properly |
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When an engine is overhauled, how is its total time affected? When an engine is rebuilt, how is its operating history affected? |
The total time on the engine must be continued and the time since major overhaul is entered into the engine log. If the manufacturer rebuilds the engine, its granted a zero-time status and is considered to have no previous operating history. |
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What inspections should be performed after a propeller strike without sudden stoppage? |
1. Inspect engine mounts, the crankcase, and the nose section for damage. 2. Inspect the oil and oil filters/screens for metal particles. 3. Inspect the crankshaft or driveshaft for cracks and misalignment. |
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Name some of the precautions that should be taken prior to engine removal. |
Disconnect the battery, turn off the fuel valves, chock the wheels, and if necessary install a tail stand. |
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When inspecting a piston, where are the cracks most likely to be found? |
In those areas that are highly stressed; usually the base of the piston bosses, inside at the junction of the bore and the walls, and ring lands. |
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What does it mean if an engine part is within "serviceable limits"? |
It means that the part is within the manufacturers limits and can be used in an engine (does not require replacement) |
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What tools or instruments are used to inspect a cylinder barrel for out-of-roundness? |
A dial indicator or an inside micrometer is usually used to measure the top of the cylinder and at the skirt. A telescopic gauge and micrometer can also be used. Two readings should be taken 90° to each other. |
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How can loose stud in an engine crankcase be repaired? |
Remove the loose stud and inspect the hole for size and thread condition. It may be necessary to use an oversize stud or helicoil insert |
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What publication is used to check an engine for normal operation? |
Manufacturer's maintenance manual. |
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A weak cylinder is found during a compression check. What must be inspected? |
Pressure is transmitted equally in all directions. |
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What purpose does an oil analysis serve? |
Metal particles in the oil show normal and abnormal wear of the engine. This helps evaluating the engine's internal condition. |
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What inspection should be performed on an engine that has been in storage? |
Perform an inspection to determine if there is any corrosion damage. |
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Where would a carburetor air temperature bulb be located? |
In the ram air intake duct. |
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What is the fuel pressure range on a float-type carburetors? |
3-5 psi |
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Name the basic components of a fuel indicator system |
The transmitter and the indicator. |
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What unit of measure is generally used to indicate fuel flow? |
Pounds or gallon per hour |
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Why is fuel flow monitored? |
To determine fuel consumption and engine performance. |
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What does the manifold gauge indicate and how is it calibrated? |
It measures the absolute pressure in the engine manifold and is calibrated in inches of mercury. |
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What directly controls manifold pressure? |
Throttle opening and engine r.p.m. |
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During engine operation, where should the propeller control be set when checking the manifold pressure? |
Low pitch, High rpm. |
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Is the aircraft electrical system required to power a cylinder head temperature gauge? |
No. A thermocouple is used as the electrical source. |
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What are the possible indications of an oil pressure transmitter or indicator malfunction? |
A severe or sudden drop in oil pressure while the oil temperature remains normal and the oil supply remains full. |
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What does a tachometer indicate on a reciprocating engine? |
Engine rpm |
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Where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system? |
On the hottest cylinder |
