chapter 2 - recip engine operation, instument, maintenance Flashcards
(26 cards)
what indication are given in event of leaking or open primer while engine is running
engine will not idle
cold cylinder found when troubleshotting what does mean
no combustion in cylinder
when pulling propeller through, hissing sound heard indicating blow-by what you have to do
compression check should be performed
what is purpose of compression check
to check valves, piston, rings seat properly
when engine overhaul how is total time affected? when engine is rebuilt how operating history affected
total time must continued and time since major overhaul is entered into engine log. if manufacturer rebuild engine it become zero
what have to do after propeller strike without sudden stoppage
- inspect engine mount crankcase, nose section for damage
- inspect oil, oil filter for metal particle
- inspect crankshaft for cracks
name precaution before engine removal
disconnect battery, turn off fuel valve, chock wheel, install tail stand
when inspecting piston, where cracks mostly found
- base of piston bosses
- inside at junction of bore and walls
- ring lands
What does it mean if an engine part is within “serviceable limits”?
It means that the part is within the manufacturer’s limits and can be used in an engine (does not require replacement).
What tools or instruments are used to inspect a cylinder barrel for out-of-roundness?
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.
How can a 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 Heli-Coil® insert.
What publication is used to check an engine for normal operation?
Manufacturer’s maintenance manual.
weak cylinder is found during a compression check. What must be inspected!
Pressure is transmitted equally in all directions.
What purpose does an oil analysis serve?
Metal particles in the oil show normal and abnormal wear of the engine. This helps in evaluating the engine’s internal condition.
What inspection should be performed on an engine that has been in storage?
Perform an inspection to determine if there is any corrosion damage.
Where would a carburetor air temperature bulb be located?
In the ram air intake duct.
What is the fuel pressure range on float-type carburetors?
3 to 5 psi
Name the basic components of a fuel indicator system.
The transmitter and the indicator.
What unit of measure is generally used to indicate fuel flow?
Pounds or gallons per hour.
Why is fuel flow monitored?
To determine fuel consumption and engine performance.
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 mer-cury.
What directly controls manifold pressure?
Throttle opening and engine r.p.m.
During engine operation, where should the propeller control be set when checking the manifold pressure?
low pitch, high rpm
Is the aircraft electrical system required to power a cylinder head temperature gauge?
No. A thermocouple is used as the electrical source.
