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
What is the correct method for checking fluid level in an aircraft hydraulic reservoir during an inspection?
Answer: Follow the specific aircraft manufacturer's maintenance manual instructions
The correct position for checking hydraulic fluid level varies significantly by aircraft design and system architecture; the IA must always follow the specific aircraft manufacturer's maintenance manual instructions.
A milky or cloudy appearance of hydraulic fluid most commonly indicates which condition?
Answer: Water contamination in the hydraulic system
A milky or cloudy appearance in hydraulic fluid is a classic indicator of water contamination, which can cause corrosion in the system and degrade the fluid's lubricating and sealing properties.
What is the most common cause of hydraulic fluid leaks at line connections during maintenance inspections?
Answer: Improper torque on fittings
Improperly torqued fittings are the most common source of hydraulic leaks at connections; under-torquing allows seepage while over-torquing distorts seating surfaces and causes cracks.
Under what circumstances may MIL-H-5606 (petroleum-based, red) hydraulic fluid be mixed with MIL-H-83282 (synthetic, red) hydraulic fluid?
Answer: They should never be mixed; the system must be flushed if contamination occurs
Although both fluids are red and may appear identical, MIL-H-5606 and MIL-H-83282 should not be mixed; if contamination occurs, the system must be drained, flushed, and refilled with the aircraft manufacturer's specified fluid.
What is the primary function of a hydraulic accumulator in an aircraft hydraulic system?
Answer: To store pressurized fluid for emergency use and dampen pressure surges
Hydraulic accumulators store a quantity of pressurized fluid for emergency operation of critical systems and help absorb pressure surges, providing more consistent system pressure during rapid actuator movement.
During an annual inspection, an IA finds hydraulic fluid seeping past the piston rod seal of a landing gear actuator. What action is required?
Answer: Replace the seals or overhaul the actuator before returning to airworthy service
A leaking actuator seal compromises system pressure integrity and creates a fire hazard from hydraulic fluid on hot components; the actuator must have its seals replaced or be overhauled before the aircraft is returned to service.
Which regulation requires the inspection of hydraulic systems as part of an aircraft annual inspection?
Answer: 14 CFR Part 43, Appendix D
14 CFR Part 43, Appendix D enumerates the items that must be inspected during an annual or 100-hour inspection, including hydraulic systems and their components.
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