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Questions and Answers
What is an indication of excessive wear in the shoulder area of an aircraft tire?
What is an indication of excessive wear in the shoulder area of an aircraft tire?
- Underinflation
- Improper tire balancing
- Overinflation
- Excessive toe-in (correct)
How long should you wait after a flight before checking tire pressure?
How long should you wait after a flight before checking tire pressure?
- At least 2 hours (3 hours in hot weather) (correct)
- At least 5 hours
- At least 1 hour
- At least 3 hours (4 hours in hot weather)
What is the purpose of a relief system valve in a brake assembly system?
What is the purpose of a relief system valve in a brake assembly system?
- To compensate for the thermal expansion (correct)
- To increase brake fluid pressure
- To reduce pressure for break application
- To prevent the tire from skipping
What is the most probable cause of a dragging left brake on an airplane with no recent brake service work?
What is the most probable cause of a dragging left brake on an airplane with no recent brake service work?
What will cause parking brakes to continually bleed off pressure?
What will cause parking brakes to continually bleed off pressure?
What is the purpose of chevron seals in shock struts?
What is the purpose of chevron seals in shock struts?
What is the purpose of a stripe or mark applied to a wheel rim and tire?
What is the purpose of a stripe or mark applied to a wheel rim and tire?
What is another possible cause of an external leak in the brake line?
What is another possible cause of an external leak in the brake line?
What is the purpose of bleeding brakes?
What is the purpose of bleeding brakes?
What does an embossed letter 'NP' on an air valve core stem indicate?
What does an embossed letter 'NP' on an air valve core stem indicate?
What is measured to determine the proper operating position of an oleo shock strut?
What is measured to determine the proper operating position of an oleo shock strut?
What type of brake is not adaptable to mechanical operation?
What type of brake is not adaptable to mechanical operation?
What is the primary purpose of a debooster cylinder in a brake system?
What is the primary purpose of a debooster cylinder in a brake system?
How should an empty shock strut be filled with fluid?
How should an empty shock strut be filled with fluid?
What indicates that an O-ring is intended for use in a hydraulic system using MIL-H5606 fluid?
What indicates that an O-ring is intended for use in a hydraulic system using MIL-H5606 fluid?
If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, what can be said about the wheels?
If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, what can be said about the wheels?
What is a benefit of using stressed skin metal in a wing assembly?
What is a benefit of using stressed skin metal in a wing assembly?
When inspecting a stressed skin metal wing assembly known to have been critically loaded, what is true?
When inspecting a stressed skin metal wing assembly known to have been critically loaded, what is true?
What occurs when bearing failure has occurred in a rivet?
What occurs when bearing failure has occurred in a rivet?
How is the stud length of a Dzus turnlock fastener measured?
How is the stud length of a Dzus turnlock fastener measured?
What angle must a piece of flat stock be bent to form a closed angle of 15°?
What angle must a piece of flat stock be bent to form a closed angle of 15°?
How does acoustic emission testing detect defects in composite materials?
How does acoustic emission testing detect defects in composite materials?
What is one of the best ways to assure that a properly prepared batch of matrix resin has been achieved?
What is one of the best ways to assure that a properly prepared batch of matrix resin has been achieved?
What can occur if genuine rivet tipping has occurred?
What can occur if genuine rivet tipping has occurred?
What should be used for the final cleaning of a surface?
What should be used for the final cleaning of a surface?
What is the main concern when using rivets in composite structures?
What is the main concern when using rivets in composite structures?
What type of loads cause the most rivet failures?
What type of loads cause the most rivet failures?
What is the primary alloying agent of 2024-T3 indicated by?
What is the primary alloying agent of 2024-T3 indicated by?
What should be provided when using rivets or nuts and bolts?
What should be provided when using rivets or nuts and bolts?
Aircraft structural units, such as spars, engine supports, etc., can be:
Aircraft structural units, such as spars, engine supports, etc., can be:
What is a benefit of using microballoons when making repairs to laminated honeycomb panels?
What is a benefit of using microballoons when making repairs to laminated honeycomb panels?
Why are slotted holes not recommended when using rivets or nuts and bolts?
Why are slotted holes not recommended when using rivets or nuts and bolts?
What function does a transmitter in a fuel pressure warning system serve?
What function does a transmitter in a fuel pressure warning system serve?
What should be used to inert an integral fuel tank before attempting repairs?
What should be used to inert an integral fuel tank before attempting repairs?
How many ways can a typical large transport aircraft's fuel manifold system serve the fuel?
How many ways can a typical large transport aircraft's fuel manifold system serve the fuel?
What is the primary purpose of a fuel tank sump?
What is the primary purpose of a fuel tank sump?
What do fuel baffles installed in tanks primarily help prevent?
What do fuel baffles installed in tanks primarily help prevent?
What does normal fuel crossfeed system operation in multiengine aircraft allow for?
What does normal fuel crossfeed system operation in multiengine aircraft allow for?
What is usually the electrical state of all switches before attempting maintenance on fuel systems?
What is usually the electrical state of all switches before attempting maintenance on fuel systems?
What key feature does a fuel manifold system provide for maintaining fuel conditions?
What key feature does a fuel manifold system provide for maintaining fuel conditions?
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Study Notes
Aircraft Landing Gear System
- Excessive tire wear in the shoulder area indicates potential overinflation or excessive toe-in issues.
- Recommended wait time after a flight before checking tire pressure is at least 3 hours in hot weather.
- Parking brakes can bleed off due to internal leaks in the master cylinder or insufficient hydraulic fluid.
- Chevron seals in shock struts serve to prevent oil escape and absorb shock effects.
- An air valve core stem indicating high-pressure type features an embossed "NP."
Brake System Components
- Debooster cylinders in brake systems primarily reduce brake pressure and maintain static pressure.
- Bleeding brakes involves withdrawing fluid from the system to remove air.
- A stripe or mark on wheel rims indicates service work completion or specifications.
Rivet and Fastener Inspection
- Rivets showing no visible distortion after critical load inspections may not require further investigation.
- Genuine rivet tipping is evident if consecutive heads tip in the same direction.
- Dzus turnlock fasteners consist of a stud, grommet, and receptacle, measured in hundredths of an inch.
Material and Structural Integrity
- Aircraft structural units are generally repairable unless subjected to compressive loads.
- Shear loads cause the majority of rivet failures while bearing loads and head failures are also significant.
- Adhesive bonding in composite structures eliminates the need for hole-filling fasteners like rivets.
Fuel System and Maintenance
- Transmitters in fuel pressure warning systems convert fluid pressure to electrical signals.
- Baffles in fuel tanks prevent surging and vapor accumulation due to aircraft attitude changes.
- To inert an integral fuel tank before repairs, carbon dioxide is typically used.
General Aircraft Maintenance Procedures
- A typical large transport aircraft fuel manifold allows servicing from all tanks simultaneously.
- Fuel sump systems collect water and dirt for safe operation and to prevent contamination risks.
- Normal fuel crossfeed system operations in multi-engine aircraft help maintain balanced fuel loads.
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