Aircraft Fuel Systems Flashcards
6 cards from real A&P practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Aircraft Fuel Systems flashcards as text
What is a fuel system finger strainer, and where is it typically located?
Answer: A fine-mesh screen located at the inlet of the carburetor or fuel injection system to catch debris
A finger strainer is a small cylindrical mesh filter at the inlet to the carburetor or fuel control unit that captures particles that pass through the main fuel strainer.
On a fuel-injected aircraft engine, what symptom indicates a clogged fuel injector nozzle?
Answer: Low EGT and low fuel flow on the affected cylinder compared to the others
A clogged injector nozzle reduces fuel flow to that cylinder, causing a lean condition indicated by lower EGT and reduced fuel flow on the affected cylinder on the engine analyzer.
What is the purpose of an aircraft fuel heater (fuel de-icing system) on turbine aircraft?
Answer: To prevent wax crystals and ice from forming in the fuel and clogging the fuel filter
Fuel heaters warm the fuel before it passes through the filter to melt ice crystals and dissolve wax that could block the filter element at cold operating temperatures.
What precaution must be taken when bonding and grounding an aircraft during fuel servicing?
Answer: The bonding wire must be connected to the fuel truck first, then to the aircraft, before the fuel cap is removed
The bonding wire is attached to the fuel truck first, then to the aircraft before opening any fuel caps, to equalize static charge and prevent a spark that could ignite fuel vapors.
What does a fuel flow transmitter (transducer) measure on a fuel-injected piston aircraft?
Answer: The mass or volume flow rate of fuel delivered to the engine, displayed in the cockpit as GPH or PPH
A fuel flow transducer measures the rate of fuel flow to the engine in gallons per hour (GPH) or pounds per hour (PPH), giving pilots real-time consumption data for fuel management.
Per 14 CFR Part 43, what action is required after performing maintenance on an aircraft fuel system that could affect airworthiness?
Answer: A functional test run must be performed and a return-to-service entry made in the aircraft maintenance records
After fuel system maintenance, the mechanic must perform an operational check of the repaired portion, confirm airworthiness, and make a proper maintenance record entry per 14 CFR 43.9 before return to service.