IA Fuel Systems & Hydraulic Systems Inspection 3

Question 1

During an annual inspection of a fuel-injected engine, what critical check is specifically required that does not apply to carbureted engines?

Accepted Answer

Verifying fuel flow divider and injector nozzle condition and flow balance

Answer

Checking all fuel sumps for water contamination

Answer

Inspecting fuel tank vent tubes for obstructions

Answer

Testing the electric fuel boost pump operation

Question 2

Regarding age-based replacement of flexible aviation fuel hoses, what is the FAA's universal mandatory replacement interval?

Accepted Answer

There is no single FAA universal interval; the specific aircraft manufacturer's maintenance manual governs

Answer

3 years from date of manufacture

Answer

5 years from date of installation

Answer

10 years from date of manufacture

Question 3

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?

Accepted Answer

Whether the pitting exceeds the manufacturer's acceptable damage limits and structural tolerances

Answer

Whether the pitting has fully penetrated through the tank wall at any point

Answer

The installation age of the tank and its calculated remaining service life

Answer

Whether the corrosion is classified as Type I or Type II aluminum oxide

Question 4

What does the designation '100LL' mean when referring to AVGAS 100LL aviation fuel?

Accepted Answer

100 octane anti-knock rating, low lead content relative to the older 100/130 AVGAS formulation

Answer

100 octane, low compression, suitable for low-horsepower engines only

Answer

100% aviation-grade specification with low-level corrosion inhibitor additives

Answer

100 horsepower rating with a low-leakage fuel system specification

Question 5

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?

Accepted Answer

Air trapped in the hydraulic brake lines

Answer

Low hydraulic fluid level in the brake master cylinders

Answer

Worn brake pads or disc wear beyond service limits

Answer

Brake caliper pistons that are improperly adjusted

Question 6

Under 14 CFR Part 43, Appendix D, which fuel system components are specifically required to be cleaned and checked during an annual inspection?

Accepted Answer

Fuel tank caps, vents, and fuel filler openings

Answer

Electric fuel boost pumps and their circuit breakers

Answer

Fuel quantity transmitters and indicator accuracy

Answer

All fuel tanks must be removed for internal inspection

Question 7

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?

Accepted Answer

Do not return to service until the engine and fuel system are inspected per the manufacturer's fuel contamination procedures

Answer

Drain the entire fuel system, flush with 100LL AVGAS, and perform a full-power ground run

Answer

Document the misfueling event in maintenance records and advise the owner to operate at reduced power

Answer

Run the engine at ground idle to purge the Jet-A, then top off with 100LL AVGAS and run up normally