2A652 Aerospace Ground Equipment CDCs (Vol 4)

Repairing ground heater equipment can be a complex task that requires accurate technical knowledge. Without accurate technical data, attempting to repair the equipment can lead to further damage or even accidents. It is important to have access to accurate technical information to ensure that the repair is done correctly and safely.

During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit movement only when actuated, meaning they should only move when they are intentionally activated. They should not have any jumping movements, which would indicate a sudden and unexpected motion. Additionally, there should be no binding movements, which would suggest that the components are stuck or not moving smoothly. Therefore, all of the above statements are correct and should be observed during the operational check of the MJ-1B bomblift.

When a line is removed from a hydraulic test stand, it is important to replace it with the same type of line to ensure compatibility and proper functioning of the system. Additionally, marking all the locations of the line helps in identifying the correct placement during reassembly. Lastly, sealing all openings is necessary to prevent any leakage or contamination. Therefore, all of the above options should be followed when removing a line from a hydraulic test stand.

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The correct answer is "Unit TO". Unit TO stands for Unit Technical Order, which is a document that provides detailed instructions and procedures for testing and maintaining specific components or equipment. It is a comprehensive resource that guides technicians on how to perform tests and inspections on a particular component. By referring to the Unit TO, technicians can ensure that they follow the correct procedures and guidelines for testing the component effectively.

Superheat refers to the additional heat added to a gaseous substance above its boiling point, without causing it to change into a liquid state. It is the heat energy that remains in the gas after it has reached its boiling point. This term is commonly used in the context of refrigeration and air conditioning systems, where superheated gases are important for efficient heat transfer and cooling processes.

Phase 1 equipment inspection requires the inspection of only asterisked items in the workcards. This means that during Phase 1, only specific items marked with an asterisk on the workcards need to be inspected. It is likely that Phase 1 is a specific stage or process in the equipment inspection where only these selected items are prioritized for inspection.

The periodic inspection (PE) section is typically found in the Operation and service TO (Technical Order). This TO provides instructions for the regular operation and maintenance of equipment, including scheduled inspections to ensure its proper functioning. It outlines the procedures and requirements for conducting periodic inspections to identify and address any potential issues or maintenance needs. Therefore, the Operation and service TO is the most appropriate TO that contains the periodic inspection section.

The ammeter is the correct answer because it is a component that measures the current flowing through the electrical system. When the alternator is charging, it will produce a current that can be measured by the ammeter. Therefore, if the ammeter shows a positive reading, it indicates that the alternator is charging the electrical system.

A mesh screen is used to prevent large particles in the fluid from entering the reservoir when servicing the hydraulic cart. The mesh screen acts as a filter, allowing only smaller particles and clean fluid to pass through while blocking larger particles. This helps to maintain the cleanliness and integrity of the hydraulic system, preventing any potential damage or contamination from occurring.

A good refrigerant needs to operate with low pressure in order to minimize the risk of system failures and leaks. It should also have a low boiling point so that it can easily absorb heat from the surroundings and turn into a vapor. Additionally, it should not be poisonous to ensure the safety of both the environment and individuals who come into contact with it. Therefore, a good refrigerant should possess all of these qualities: operate with low pressure, have a low boiling point, and not be poisonous.

When starting the MA-3D air conditioner, it is important to hold the safety override switch until 30 psi oil pressure is registered on the engine oil pressure gauge. This ensures that the engine has reached the necessary oil pressure for it to function properly. Holding the switch until this pressure is reached helps to prevent any potential damage or malfunctions that could occur if the engine is started without sufficient oil pressure.

Before performing maintenance on a liquid oxygen (LOX) cart, it is important to ensure that your tools are free of grease and oil and the cart is drained. This is necessary to prevent any contamination or potential hazards that could arise from the presence of grease, oil, or residual liquid oxygen in the cart. By ensuring that the tools are clean and the cart is drained, you can minimize the risk of accidents or damage during the maintenance process.

The self generating nitrogen servicing cart (SGNSC) should stop producing nitrogen at a storage cylinder pressure of 4400 psig.

The counterbalance valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure. This valve is designed to maintain a consistent pressure in the system, ensuring that the lifting arms remain stable and do not collapse. It acts as a safety mechanism, providing stability and preventing any potential accidents or damage that could occur if the arms were to collapse.

A hand-operated cable is used to raise the mast on the FL-1D. This implies that there is a cable that can be manually operated by hand to raise the mast. The other options, such as screw mechanism, pneumatic controls, and hydraulic cylinder, do not mention the use of a hand-operated cable and therefore are not the correct answer.

The correct answer is British Thermal Unit (BTU). BTU is a unit of measurement used to quantify the amount of heat energy required to raise the temperature of one pound of a substance by one degree Fahrenheit. It is commonly used in the field of heating, ventilation, and air conditioning (HVAC) to determine the heating or cooling capacity of systems.

The throttle is the component that provides manual speed adjustment on the AF/M32T-1 cabin leakage tester. The throttle controls the amount of fuel and air entering the engine, which in turn determines the speed of the engine. By adjusting the throttle, the operator can increase or decrease the speed of the cabin leakage tester, allowing for precise control and adjustment during testing.

Starting aids should never be used to start the New Generation Heater. This implies that the heater does not require any external assistance or additives to initiate its operation. It is designed to start without the need for starting aids, indicating that the heater is self-sufficient and can initiate its function under normal conditions without any additional help.

The oil in the rotary vane compressor forms a seal between the vanes and the stator. This is important because it helps prevent leakage of compressed gas and ensures efficient operation of the compressor. The oil acts as a barrier between the moving vanes and the stationary stator, reducing friction and wear. It also helps to maintain a tight seal, allowing the compressor to generate and maintain high pressure.

A separation membrane is a component on the self-generating nitrogen servicing cart (SGNSC) that removes nitrogen from the ambient air. This membrane is designed to selectively allow the passage of nitrogen molecules while blocking other gases, such as oxygen and moisture. As the ambient air is passed through the separation membrane, nitrogen molecules are separated and collected, resulting in a purified nitrogen stream. This purified nitrogen can then be used for various applications, such as inflating aircraft tires or servicing pneumatic systems.

A fresh hydraulic leak will be oily and red because hydraulic fluid is typically red in color and has a viscous, oily consistency.

To check the backup hydraulic system on the MHU83C/E bomblift, you need to operate the hand pump. This is because the hand pump is responsible for manually pressurizing the hydraulic system in case of a power failure or malfunction. By operating the hand pump, you can ensure that the backup hydraulic system is functioning properly and ready to be used if needed.

If the starter failed to operate on a bomblift, the first step should be to check the battery terminals and posts. This is because loose or corroded connections can prevent the starter from receiving enough power to operate. By checking and ensuring the battery terminals and posts are clean and secure, it can help identify and resolve any issues related to the power supply, before considering other potential causes such as faulty starter cables or a malfunctioning starter.

When performing a front end alignment on a nitrogen servicing unit, the component that would be adjusted to equalize the distance from each steering knuckle king pin to the center of the towbar lunette eye is the tie rod ends. The tie rod ends are responsible for connecting the steering linkage to the wheels, and adjusting them will help ensure that the wheels are properly aligned and the vehicle moves in a straight line.

The self-generating nitrogen servicing cart (SGNSC) is categorized as a high-pressure air compressor because it is designed to generate and deliver nitrogen at high pressures. This type of compressor is typically used for applications that require high-pressure air, such as filling aircraft tires or providing pneumatic power for aircraft systems. The SGNSC is specifically designed to generate nitrogen, which is often used in aviation for various purposes, including purging and pressurizing aircraft systems. Therefore, it is classified as a high-pressure air compressor rather than a low-pressure air compressor or a high or low volume air compressor.

When performing maintenance on the self-generating nitrogen servicing cart (SGNSC), it is important to prioritize safety. This means following all necessary safety protocols and guidelines to ensure the well-being of the maintenance personnel and prevent any accidents or injuries. Safety should always be the top priority when working with any equipment or machinery, including the SGNSC.

The continuous movement of pressurized hydraulic fluid in the MJ-1B bomblift causes friction, which generates heat. As the fluid flows through the system, it absorbs this heat and becomes heated.

The mast erection crank can be used to relieve tension from the lock and disengage the latch from the striker plate on the FL-1D when lowering the mast. This crank allows for manual operation and control of the mast, providing a way to release the tension and safely lower the mast without causing damage or injury.

The heater control unit (HCU) on the New Generation Heater starts the main air fan for output air when the inside temperature reaches 140 degrees F. This indicates that the heater has reached the desired temperature and is ready to distribute warm air. Once the temperature reaches this threshold, the HCU activates the main air fan to circulate the heated air throughout the space. This ensures that the desired temperature is maintained and that the heating system is functioning properly.

Special inspections typically involve a more thorough examination of specific components or systems. Unlike daily inspections, which are routine and focus on basic checks, special inspections require more tear down and investigation. They are often performed to identify hidden issues or to assess the condition of critical components that may not be easily accessible during regular inspections. Service inspections and periodic inspections may involve a more comprehensive assessment of the overall vehicle, but they do not necessarily require as much tear down of specific components as special inspections do.

Inward leaks occur when the pressure within the refrigerant system is less than atmospheric pressure. This means that air or other substances from the outside are being drawn into the system, causing a decrease in pressure. Inward leaks can be problematic as they can introduce contaminants into the system and affect its efficiency. It is important to identify and fix inward leaks to maintain the proper functioning of the refrigerant system.

The first step of troubleshooting heater equipment is recognition. This means identifying and acknowledging the problem or issue with the equipment. It involves observing and understanding the symptoms or signs of malfunctioning in order to determine the root cause. By recognizing the problem, technicians can then proceed to the next steps of analysis, isolation, and verification to effectively troubleshoot and resolve the issue.

The MC-2A rotary vane compressor is cooled using oil. Oil is commonly used as a cooling medium in compressors because it has excellent heat transfer properties and can effectively dissipate heat generated during compression. The oil circulates through the compressor, absorbing heat from the internal components and carrying it away. This helps to prevent overheating and ensures the compressor operates efficiently and reliably.

Before performing any maintenance on an air compressor airflow system, it is important to relieve all air pressure. This is necessary to ensure the safety of the person carrying out the maintenance. If the air pressure is not relieved, there is a risk of sudden release of compressed air, which can cause injury. Therefore, it is crucial to release the air pressure before starting any maintenance tasks on the air compressor.

The lift mechanism on the towbar is designed to raise and lower the wheel assemblies. This allows for easier maneuverability and transportation of the towed object. By raising the wheel assemblies, the towbar can be easily attached or detached from the object being towed. Lowering the wheel assemblies allows for better stability and prevents the object from rolling or moving unintentionally during transportation. Overall, the lift mechanism plays a crucial role in the safe and efficient operation of the towbar.

The heat control switch is the component on the New Generation Heater that activates the heater control unit (HCU). When the heat control switch is turned on, it sends a signal to the HCU to start the heating process. This switch allows the user to control the temperature and turn the heater on or off as desired. The other options, such as the burner control unit, thermostatic sensor, and oil pressure switch, may be important components of the heater but they do not directly activate the HCU.

Latent heat refers to the heat absorbed or released during a phase change of a substance, such as from solid to liquid or liquid to gas, without causing a change in temperature. This heat is used to break or form intermolecular bonds between particles, resulting in a change of state. Unlike sensible heat, which affects the temperature of a substance, latent heat is responsible for the energy required to undergo a phase transition without changing the temperature.

The correct answer is "Unit should not move in neutral." This means that when the centering mechanism on the MHU83C/E bomblift is properly functioning, the unit should remain stationary when in neutral position. If the unit moves in neutral, it indicates a malfunction in the centering mechanism.

To charge the receiver on the MC-2A air compressor, it is important to close the receiver drain valve. This valve needs to be closed in order to prevent any air from escaping and to ensure that the receiver is properly pressurized. By closing the drain valve, the air compressor can effectively build up pressure in the receiver, allowing it to store and deliver compressed air as needed.

When analyzing an air compressor malfunction, it is most efficient to start by considering the simplest possibilities as the cause. This approach helps to eliminate any potential issues that may have simple solutions or require minimal intervention. By addressing these simpler possibilities first, it saves time and resources before moving on to more complex causes.

When starting the engine of the MJ-1B, it is important to check for sufficient oil pressure. This is because oil pressure is crucial for proper lubrication and cooling of the engine components. Insufficient oil pressure can lead to excessive friction and heat, causing damage to the engine. Therefore, checking the oil pressure ensures that the engine has the necessary lubrication before it is operated.

Fluid under the unit is the most obvious and easiest way of isolating most hydraulic malfunctions. This is because if there is fluid leaking under the unit, it indicates a problem with the hydraulic system such as a damaged seal or a broken hose. By identifying the source of the fluid leak, the specific malfunction can be identified and addressed accordingly.

The correct answer is "Engine oil change" because during a phase 1 periodic inspection (PE), one of the steps is to change the engine oil. This is important to ensure that the engine is properly lubricated and running smoothly. By regularly changing the engine oil, any contaminants or debris can be removed, which helps to maintain the overall health and performance of the engine.

The B-4 adjustable aircraft maintenance platform has the capability to adjust its height. It can be adjusted to a minimum height of three feet and a maximum height of seven feet.

The airflow control switch on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit. This switch regulates the speed of the blower, which in turn affects the amount of air being circulated. By adjusting the airflow control switch, the operator can increase or decrease the amount of air being blown out of the air conditioner, thus controlling the overall volume of air.

The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the high pressure pump. The high pressure pump requires a steady supply of fluid to operate effectively. The low pressure pump helps maintain a consistent flow of fluid, ensuring that the high pressure pump receives an adequate amount of fluid for its operation. This is important for the overall functioning of the system and to prevent any disruptions or damage to the high pressure pump.

The fill switch, LS4, provides an alternate means of energizing the fill pump when either of the micro switches are defective on the MJ-2A-1 hydraulic test stand. This means that if one or both of the micro switches fail to function properly, the fill switch can be used as a backup to activate the fill pump and ensure that the hydraulic test stand can still be operated effectively.

A tubing wrench should be used on brass or aluminum fittings because it provides a secure grip without causing damage or marring the surface of the fittings. This type of wrench has a smooth, rounded jaw that evenly distributes pressure, reducing the risk of stripping or deforming the fittings. It is specifically designed for use with tubing and pipe fittings, ensuring a tight and leak-free connection.

The stair support linkage is the component on the B-1 adjustable aircraft maintenance platform that allows the work platform and steps to remain parallel to the base at any desired platform height. This linkage system ensures that the steps and platform maintain a consistent angle and alignment with the base, providing stability and safety for maintenance personnel working at different heights.