Day 7 Progress Check Flashcards
What maintenance procedure is commonly used to test the operation of landing gear retraction and extension systems?
Landing gear retraction test (“swinging the gear”)
What is the primary purpose of drag braces or struts in a landing gear system?
To lock the gear in the extended position during ground operations
What is the function of trunnions in landing gear systems?
To connect the landing gear to the aircraft frame and allow for pivoting during retraction
Why are ground locks used in landing gear systems?
To prevent accidental retraction while the aircraft is on the ground
What component in the landing gear system helps ensure the proper alignment of the landing gear during extension and retraction?
Torque links
What is the purpose of torque links or arms in a landing gear system?
To prevent the lower strut from rotating relative to the upper cylinder
What method is typically used to extend landing gear in an emergency situation if hydraulic power is lost?
Free-fall mechanisms, allowing the gear to drop by gravity and airflow
What is a common method used in small aircraft to retract the landing gear manually?
Mechanical linkages such as levers and cranks
What is the role of nose wheel centering cams during landing gear retraction?
To lock the wheel in the straight-ahead position for retraction
How does camber alignment affect an aircraft’s ground handling?
Positive camber (wheel tops tilted outward) helps evenly distribute loads during ground
What type of landing gear retraction system is commonly used in larger aircraft?
Hydraulic systems
What function do limit switches serve in an electric-hydraulic landing gear system?
They prevent over-extension or over-retraction of the landing gear
What does the term ‘toe-in’ refer to in landing gear alignment?
The wheels point slightly inward toward the aircraft’s centerline
What is the purpose of a squat switch in a landing gear system?
To prevent landing gear retraction while the aircraft is on the ground
What is the function of sequence valves in large aircraft landing gear systems?
To ensure the gear doors open before the gear extends or retracts and close afterward
