Fuel Systems & Hydraulic Systems Inspection Flashcards
7 cards from real IA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fuel Systems & Hydraulic Systems Inspection flashcards as text
During an annual inspection of a fuel-injected engine, what critical check is specifically required that does not apply to carbureted engines?
Answer: Verifying fuel flow divider and injector nozzle condition and flow balance
Fuel injection systems require specific inspection of the fuel flow divider and individual injector nozzles for proper flow balance between cylinders, which has no equivalent in carbureted engine fuel systems.
Regarding age-based replacement of flexible aviation fuel hoses, what is the FAA's universal mandatory replacement interval?
Answer: There is no single FAA universal interval; the specific aircraft manufacturer's maintenance manual governs
The FAA has not established a single universal replacement interval for all aviation fuel hoses; the IA must follow the specific aircraft manufacturer's maintenance manual requirements, which vary by aircraft model.
An IA finds corrosion pitting in the interior of an aluminum fuel tank during an annual inspection. What determination is required before returning the aircraft to service?
Answer: Whether the pitting exceeds the manufacturer's acceptable damage limits and structural tolerances
Corrosion pitting must be evaluated against the aircraft manufacturer's published acceptable damage limits; the IA must determine whether the tank's structural integrity remains within those tolerances before authorizing return to service.
What does the designation '100LL' mean when referring to AVGAS 100LL aviation fuel?
Answer: 100 octane anti-knock rating, low lead content relative to the older 100/130 AVGAS formulation
AVGAS 100LL designates an aviation gasoline with a 100 octane anti-knock rating and 'low lead' content (reduced from the older 100/130 grade), dyed blue for visual identification at fueling.
During an annual inspection, the IA notes that the aircraft's wheel brakes feel spongy when the brake pedals are applied during a ground check. What does this most likely indicate?
Answer: Air trapped in the hydraulic brake lines
A spongy brake feel is a classic symptom of air trapped in the hydraulic brake lines; because air is compressible (unlike hydraulic fluid), it allows pedal travel without proportional brake application force.
Under 14 CFR Part 43, Appendix D, which fuel system components are specifically required to be cleaned and checked during an annual inspection?
Answer: Fuel tank caps, vents, and fuel filler openings
14 CFR Part 43, Appendix D specifically lists fuel tank caps, vents, and fuel filler openings as items to be cleaned and checked during an annual inspection.
During a pre-purchase inspection, an IA discovers the aircraft was inadvertently fueled with Jet-A instead of 100LL AVGAS. What is the required action before the aircraft may be returned to service?
Answer: Do not return to service until the engine and fuel system are inspected per the manufacturer's fuel contamination procedures
Misfueling a piston aircraft with Jet-A is a serious airworthiness event; the aircraft must not be returned to service until the engine and fuel system have been inspected per the engine and airframe manufacturer's specific fuel contamination recovery procedures.
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