Module 8 Troubleshooting Flashcards
Troubleshooting requires the understanding of the ?
System and operation of the aircraft
The best way to troubleshooting is ?
Systematic
The manufacture maintenance manual often provides to help troubleshooting with?
Troubleshooting tables and logic flow charts
Information submitted by transport Canadá about discrepancies that are difficult to resolve or affect safety is called?
Service difficulty report
MTC technicians receive discrepancy reports for pilots you may obtain additional information by?
Interviewing the pilots
Additional questions that should you ask the pilot about aircraft discrepancies ?
- what face off flight was the aircraft in?
- what were the engine power and mixture settings
- what were the whether conditions during the flight
- is the problem continuous or intermittent
- has the problem become increasingly worse or better
- did the engine backfire,after fire or stumble
Can more than one problem contribute to discrepancies?
Yes, sometime multiple faults are the cause
When starting to rectify a discrepancy it’s always the best start with __________ solution
Simplest and least inexpensive component
Is swapping parts an accepted troubleshooting method?
Yes
Effective troubleshooting save __________ and _______:
Time and money
What can be the cause for an engine with a fast rough idle
Lean mixture-small leak in the induction system
What is the possible cause for with an engine with slow rough idle with a black soot from the exhaust?
Rich mixture-improperly adjusted fuel metered device
What is possible problem for an engine with kickback during starting and increase on the EGT and resultant RPM drop?
Broken impulse coupling
What is the posible cause for excessive carbon deposits on the spark plugs ?
Rich mixture, short flights, cold plug (heat range )
What is a possible cause for hard starting engine ?
- Defective impulse coupling
- defective spark plugs or ignition wiring
- flooded engine
After several hundreds hour of operation, the plastic can follower on the points will wear. This will cause ?
The timing to drift late
An engine with the impulse coupling on the LH magneto, if the pilot start the engine with the RH magneto, what symptoms you might see?
Kick back
Should you allowed an aircraft to fly with a fluctuating oil pressure to fly?
No an inflight engine failure may occur
What could cause the engine nose seal to leak ?
A blocked crankcase breather
Using the wrong grade of Oil May cause ?
Low oil pressure and high oil temperature
What could cause oil out of the crankcase breather ?
Excessive blow-by
To low and oil level can show as a :
Fluctuating oil pressure gauge
An excessive spark plug gap will make the engine?
Harder to start
An engine has a sudden drop in oil pressure what could be a possible reason?
Failing bearing, pistón rings or other parts
If the rings do not seat the oil entering in the combustion chamber could lead to ?
Spark plug fouling, possible detonation ( oil octane rating )
an engine fail to produce maximum power for take off, what possible problems could be?
- carb ice
- carb heat on
- dirty filter
- intake restriction
- mixture problem
- leak in the intake
- exhaust restriction
- throttle not opening fully
- improper rocker arm clearance
- stuck carb float
if the waste gate in a turbocharger fail to close due the carbon build up, what symptom would be the pilot see?
the engine will fail to make maximum manifold pressure
if a turbocharger exceeds limits during rapid acceleration, the controller malfunctioning is?
rate change controller
the engine exceeds manifold pressure on the take off what could be the fault?
APC set incorrectly, pressure relief valve fails to open
what will happen if an excessively lean fuel/air mixture enters into the cylinder
backfire-out trough the induction system
what can cause backfire?
incorrect valve clearance, defective fuel nozzles
what will happen if an excessively rich fuel/air mixture enters into the cylinder
after fire-out trough the exhaust
what can cause after fire
faulty spark plug-incorrect valve clearance
