Aircraft Maintenance Engine & System Repairs Flashcards
7 cards from real AM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aircraft Maintenance Engine & System Repairs flashcards as text
When inspecting a turbine engine for hot section damage, which area is most susceptible to thermal cracking?
Answer: Turbine nozzle guide vanes
Turbine nozzle guide vanes are exposed to the highest gas temperatures in the engine and are most susceptible to thermal cracking and erosion.
What is the correct method to check for internal cylinder cracking on a reciprocating engine cylinder barrel?
Answer: Magnetic particle inspection
Magnetic particle inspection (Magnaflux) is used on ferrous cylinder barrels to detect internal and surface cracks not visible to the naked eye.
During engine run-up, oil pressure drops to zero but oil temperature remains normal. The most likely cause is:
Answer: Faulty oil pressure gauge or sending unit
A sudden drop to zero with normal temperature and no engine distress usually indicates an instrument or sender failure rather than actual oil starvation.
A turbojet engine compressor stall is best identified by which symptom during ground run?
Answer: Loud banging or popping with RPM fluctuation
Compressor stall produces a characteristic loud bang or series of pops accompanied by RPM fluctuation and a surge in exhaust gas temperature.
What type of safety wire is required for aircraft engine oil drain plugs per FAA regulations?
Answer: 0.020-inch stainless steel wire
FAA AC 43.13-1B specifies 0.020-inch diameter stainless steel safety wire for most engine hardware including oil drain plugs.
A reciprocating engine shows low power output and rough running on one magneto. After replacing the magneto, the problem persists. The next inspection should focus on:
Answer: Ignition harness insulation breakdown
Persistent rough running after magneto replacement with one magneto suggests the ignition harness has high-resistance or insulation breakdown causing misfires.
When reinstalling a turbine engine fuel nozzle, the torque value listed in the manufacturer's manual is considered:
Answer: A specific value with defined tolerance
Manufacturer-specified torque values for fuel nozzles are specific values with tolerances that must be followed exactly to ensure proper seating and prevent leaks.