BTEC HND Level 3 Unit 53: Airframe Mechanical Systems Assignments Answers

Airframe mechanical systems (AFMS) are the systems and equipment that allow an aircraft to fly. This includes the wings, fuselage, landing gear, and control surfaces. The airframe mechanic is responsible for maintaining these systems in proper working condition. This can include conducting regular inspections, making repairs or replacements as needed, and performing routine maintenance tasks. This unit will introduce you to the basic concepts of airframe mechanical systems, including their history, design, and operation.

Assignment Activity 1: Investigate how the operation of hydraulic-power, landing-gear, and flying-control systems contribute to safe flight.

Hydraulic-powered systems are commonly used in aircraft to actuate the landing gear, as well as the flying control surfaces. The use of hydraulics helps to transmit the power needed to move these large and heavy components, while also providing a measure of safety by incorporating backup systems. For example, if there is a loss of hydraulic pressure in one system, the other systems can still be used to actuate the landing gear or flying controls.

Additionally, hydraulic fluids are often chosen for their inert properties; that is, they do not support combustion and therefore pose no risk of fire. In fact, many commercial aircraft operate on multiple redundant hydraulic systems so that even if one system fails, there is still another available to safely land the aircraft.

The landing gear is a critical component of an aircraft, as it is responsible for both supporting the weight of the plane and providing a smooth touchdown during landing. In order to ensure that the landing gear functions properly, it must be regularly inspected and maintained. This includes checking the tires for wear and tear, as well as lubricating the moving parts to prevent corrosion.

The flying control surfaces are the primary means by which an aircraft is controlled in flight. These include the ailerons, elevators, and rudder. The ailerons are responsible for controlling roll, or the side-to-side movement of an aircraft. The elevators control pitch, or the up-and-down movement of the aircraft. And the rudder controls yaw or the rotation of the aircraft about its vertical axis.

All of these systems work together to ensure a safe and smooth flight for the passengers and crew. By understanding how they operate, the airframe mechanic can properly maintain them and help keep the aircraft in safe flying condition.

Assignment Activity 2: Examine how the operation of cabin environmental control and protection systems contribute to the protection of passengers and crew.

The cabin environmental control and protection systems (CECP) are responsible for maintaining a comfortable and safe environment for the passengers and crew. This includes regulating the temperature, humidity, and air pressure in the cabin, as well as providing fresh air and filtering out contaminants.

One of the most important functions of the CECP is to maintain a safe level of oxygen in the cabin. An insufficient supply of oxygen can cause drowsiness, dizziness, and even death. By regulating the cabin environment, the CECP helps to ensure that passengers and crew are safe and comfortable during their flight.

Additionally, the CECP protects passengers and crew from potential hazards such as fire or smoke. The systems work to clean the air of any smoke or fumes, and can even provide an emergency oxygen supply in the event of a fire. By understanding how these systems operate, the airframe mechanic can help ensure that the cabin is a safe and comfortable place for passengers and crew.

Assignment Activity 3: Examine how the operation of airframe fuel, ice- and fire-protection systems contribute to safe flight.

The airframe fuel, ice- and fire-protection systems play a critical role in ensuring the safety of an aircraft. These systems work together to prevent fires and explosions due to fuel leaks, as well as to protect the aircraft from icing and other weather conditions.

• The airframe fuel system is responsible for delivering fuel to the engine and other systems on the aircraft. This includes a network of fuel tanks, pumps, and valves. In order to prevent fires and explosions, the fuel system must be properly maintained and inspected. This includes checking for leaks, as well as ensuring that the fuel is clean and free of contaminants.
• The ice-protection system is responsible for keeping the aircraft free of ice and other contaminants. This includes a variety of sensors, heaters, and de-icing systems. By keeping the aircraft free of ice, the ice protection system helps to ensure safe and reliable operation during takeoff and landing.
• The fire-protection system is responsible for detecting fires and providing emergency response. This includes a network of sensors, alarms, and extinguishers. By understanding how the fire-protection system works, the airframe mechanic can help ensure that the aircraft is safe from fire hazards.

The airframe fuel, ice- and fire-protection systems are essential to the safety of an aircraft. By understanding how these systems work, the airframe mechanic can help ensure that the aircraft is safe and reliable.

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