IA Fuel Systems & Hydraulic Systems Inspection 2

Question 1

What is the correct method for checking fluid level in an aircraft hydraulic reservoir during an inspection?

Accepted Answer

Follow the specific aircraft manufacturer's maintenance manual instructions

Answer

Always check with all actuators in the fully extended position

Answer

Always check with all actuators in the fully retracted position

Answer

Check only with the aircraft in a level flight attitude

Question 2

A milky or cloudy appearance of hydraulic fluid most commonly indicates which condition?

Accepted Answer

Water contamination in the hydraulic system

Answer

Normal aging and oxidation of the fluid

Answer

Air entrainment from a malfunctioning pump

Answer

Fluid overheating beyond maximum operating temperature

Question 3

What is the most common cause of hydraulic fluid leaks at line connections during maintenance inspections?

Accepted Answer

Improper torque on fittings

Answer

Vibration fatigue cracks in rigid lines

Answer

Chemical incompatibility between fluid and line materials

Answer

Excessive system operating pressure

Question 4

Under what circumstances may MIL-H-5606 (petroleum-based, red) hydraulic fluid be mixed with MIL-H-83282 (synthetic, red) hydraulic fluid?

Accepted Answer

They should never be mixed; the system must be flushed if contamination occurs

Answer

They may be mixed in emergencies if the resulting blend does not exceed 25% of either type

Answer

They may be mixed if system operating temperature will not exceed 160°F

Answer

They are interchangeable and may always be mixed in any proportion

Question 5

What is the primary function of a hydraulic accumulator in an aircraft hydraulic system?

Accepted Answer

To store pressurized fluid for emergency use and dampen pressure surges

Answer

To filter particulate contaminants from circulating hydraulic fluid

Answer

To boost hydraulic pressure above the pump's rated output

Answer

To provide a vent path for bleeding air from the hydraulic system

Question 6

During an annual inspection, an IA finds hydraulic fluid seeping past the piston rod seal of a landing gear actuator. What action is required?

Accepted Answer

Replace the seals or overhaul the actuator before returning to airworthy service

Answer

Clean the area, log it as a monitoring item, and return to service with owner advisory

Answer

Apply hydraulic sealant to the external seal area and return to service

Answer

Reduce system pressure by 10% and return to service with owner notification

Question 7

Which regulation requires the inspection of hydraulic systems as part of an aircraft annual inspection?

Accepted Answer

14 CFR Part 43, Appendix D

Answer

14 CFR Part 91.207

Answer

14 CFR Part 65.82

Answer

14 CFR Part 23.1435