Reciprocating engine operation, instruments, maintenance and overhaul Flashcards
what indication are given in the event of a leaking or open primer while the engine is running
the engine will not idle properly
A cold cylinder is found when troubleshooting a running engine. what does this indicates
No combustion in that cylinder
when pulling a propeller through, a hissing sound is heard indicating valve blow by. what procedure should be perform next
A compression check should be perform to identified the faulty cylinder
what is the purpose of performing a compression test
to determine if valve, rings, pistons, seal properly
When an engine is overhaul how is the total time affected and when is rebuild how is the operating history affected
the total time on the engine must be continue and the time since major overhaul is enter in the engine log. if the manufacture rebuild the engine it is granted a zero time status and is considered to have no previous operating history.
What inspection should be performed after propeller strike without sudden stoppage
- inspect engine mounts, the crankcase and the nose section for damage
- inspect the oil and oils filters/screens for metal particles.
- Inspect the crankshaft or driveshaft for cracks and misalignment.
name some of the precautions that should be performer before engine removal
disconnect the battery
turn off the fuel valves
chock the wheels and if is necessary install a tail stand
when inspecting a piston where cracks are most likely to be found
In those areas that are highly stress usually the base of the piston bosses
inside at the junction of the bore
and the walls and the ring lands
what does it means if an engine part is within serviceable limits
it means the part is within manufacture’s limit and can e use in an engine
what tools or instruments are use to inspect a cylinder barrel for out of roundness
A dial indicator or an inside micrometer is usually used to measure the top pf 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 ca a loose stud in an engine crankcase be repair
Remove the loose stud and inspect the hole for size and tread conditions it may be necessary to use an oversize stud an helicoil insert
What publication is used to check an engine for normal operation
manufactures maintenance manual
