Volume 1 Aircraft Maintenance General Subjects

When the gauge needle of a fire extinguisher is within the green markings, it indicates that the pressure is within a safe operating range. This means that the fire extinguisher is adequately pressurized and ready to be used effectively in case of a fire emergency. The green markings serve as a visual reference to ensure that the pressure is neither too high nor too low, providing assurance that the fire extinguisher is in optimal condition for use.

The responsibility for FOD (Foreign Object Debris) prevention belongs to everyone. This means that it is the duty of all individuals within an organization or facility to be aware of and take actions to prevent FOD. FOD can cause damage to equipment, pose safety risks, and lead to costly repairs. By emphasizing that everyone is responsible for FOD prevention, it promotes a culture of awareness and accountability throughout the organization. This ensures that all individuals are actively involved in identifying and mitigating potential FOD hazards.

It is never permissible to reuse cotter pins. This is because cotter pins are designed to be used only once and are not meant to be reused. Reusing cotter pins can compromise their integrity and effectiveness, potentially leading to failures or accidents. It is important to always use new cotter pins when securing fasteners to ensure proper functionality and safety.

The responsibility for initiating a lost tool report belongs to the person who was issued the tool. This is because they are the one who had possession of the tool and would be aware if it was lost or misplaced. They would need to report the loss so that appropriate actions can be taken to locate or replace the tool.

Radiation hazards are affected by the strength of emission, time of exposure, and weather. The strength of emission refers to the intensity or power of the radiation being emitted. A higher strength of emission can result in greater exposure and potential harm. The time of exposure refers to the duration of time that individuals are exposed to the radiation. Longer exposure times can increase the risk of health effects. Weather conditions can also play a role in radiation hazards as certain weather patterns can affect the dispersion and concentration of radiation in the environment.

The safe distance behind an operating jet engine exhaust is 200 feet because jet engines produce extremely hot and powerful exhaust gases. These gases can reach extremely high temperatures and velocities, posing a significant risk to anyone standing too close. To ensure safety, it is recommended to maintain a distance of 200 feet to avoid potential burns or injuries from the jet engine exhaust.

The responsibility for maintaining the Air Force Technical Order 781-series forms binder lies with the crew chief. The crew chief is typically responsible for the overall maintenance and upkeep of the aircraft, including the documentation and paperwork associated with it. They are directly involved in the day-to-day operations and maintenance of the aircraft, making them the most suitable person to handle the technical order forms binder.

The symbol entered on the forms if an aircraft exceeds the PDM cycle by 90 days and an extension is not granted is a red X. This symbol is used to indicate that the aircraft has not undergone the required maintenance within the specified time frame and that an extension has not been granted. The red X serves as a visual reminder to the maintenance personnel that the aircraft is not airworthy and should not be flown until the necessary maintenance has been completed.

The most common excuse for taking shortcuts is time restraints. When people are under pressure to complete a task within a limited timeframe, they may feel compelled to take shortcuts in order to save time. This could involve skipping certain steps, neglecting quality control, or rushing through the process. Time restraints can create a sense of urgency and make it difficult for individuals to prioritize thoroughness and attention to detail.

Latches and fasteners are the correct answer because they are the main causes of dropped objects. When latches and fasteners are not properly secured or maintained, they can become loose or fail, causing objects to fall or detach. This is especially common in industries such as construction, manufacturing, and aviation, where equipment and tools are frequently used and moved. Proper inspection and maintenance of latches and fasteners are crucial to prevent accidents and ensure workplace safety.

Sudden local storms are the most likely condition to cause aircraft damage. These storms can quickly develop and bring strong winds, heavy rain, and turbulence, which can pose a significant risk to aircraft. Unlike predicted heavy storms, hurricanes, or tornadoes, sudden local storms are more unpredictable and can catch pilots off guard, making them more dangerous in terms of potential aircraft damage.

The first step taken when reviewing an Air Force Technical Order (AFTO) 244 is to match the ID number on the form with the ID number on the unit. This ensures that the correct form is being reviewed for the specific unit, as each unit will have its own unique ID number. By matching the ID numbers, any discrepancies or errors can be identified and corrected before proceeding with the review process.

The estimated percent of accidents caused by nature is 2. This means that only 2% of accidents are caused by natural factors such as weather conditions, natural disasters, or animal encounters. The majority of accidents are likely caused by human error, mechanical failures, or other non-natural factors.

The correct answer is "Initial." The safety training phase that is described as an effective tool that creates a lasting impression for new airmen is the initial phase. This phase is crucial as it sets the foundation for airmen to understand and prioritize safety in their job roles. It helps them develop a strong safety mindset from the beginning, which is essential for their overall safety and the safety of others in the workplace.

The correct answer is the EPA. The EPA, or the Environmental Protection Agency, is responsible for publishing the Hazardous Waste Management System rules. These rules help regulate the proper handling, storage, and disposal of hazardous waste to protect human health and the environment. The EPA sets guidelines and standards for hazardous waste management to ensure compliance and prevent pollution.

A reference technical order library does not need to maintain its currency because it is a collection of documents that provide information and guidance on specific topics. Unlike training, operational, or aircraft technical order libraries, the reference library is not used for day-to-day operations or maintenance. Instead, it serves as a resource for individuals to consult when they need information or clarification on a particular subject. Therefore, the reference library does not require regular updates or revisions to stay current.

Aluminum alloy washers are used with steel bolts on aluminum alloy parts in low-torque applications to prevent corrosion. Aluminum and steel are two different metals that can cause a galvanic reaction when in contact with each other, leading to corrosion. By using aluminum alloy washers, it helps to create a barrier between the aluminum parts and the steel bolts, reducing the likelihood of corrosion occurring. This is important in low-torque applications where the risk of corrosion may be higher due to prolonged exposure to moisture or other corrosive elements.

Passing a cloth along the length of the cable can help detect broken wires because if there are any broken wires, the cloth may get caught or snag on them. This method allows for a tactile examination of the cable, which can provide physical feedback if there are any abnormalities or breaks in the wires.

Supervisors at all levels are responsible for ensuring good supply discipline is practiced. This means that it is the duty of every supervisor, regardless of their position or rank, to ensure that proper procedures and protocols are followed in managing and maintaining the supply chain. This includes monitoring inventory, enforcing accountability, and promoting efficiency in the supply system. By placing this responsibility on supervisors at all levels, it ensures that everyone in the organization is actively involved in maintaining good supply discipline.

The symptom of "a feeling of emptiness" is not typically associated with noise fatigue. Noise fatigue is characterized by symptoms such as dizziness, impairment of mental concentration, and emotional irritability. However, a feeling of emptiness is more commonly associated with other conditions such as depression or a sense of purposelessness, rather than being directly linked to noise fatigue.

The correct answer is four-wheel steering, four-wheel drive. This means that the MB-4 tractor has the capability to steer all four wheels and drive all four wheels simultaneously. This configuration allows for better maneuverability and traction, making it suitable for off-road or challenging terrains.

Special bolts are identified by the bolt head marked with the letter S. This means that the bolt head will have the letter S engraved or stamped on it, indicating that it is a special bolt. The other options mentioned, such as a triangle mark, zinc-plated nickel steel covering, or galvanized-plated steel covering, do not indicate the special nature of the bolt.

The size of an aircraft cable is determined by its diameter. The diameter refers to the thickness of the cable, which is an important factor in determining its strength and load-bearing capacity. A thicker cable will generally be able to withstand higher loads and provide more stability and support. Therefore, the diameter of the cable is a crucial specification to consider when selecting the appropriate size for an aircraft cable.

When measuring resistance on a Fluke multimeter, the letters OL indicate "Overload". This means that the resistance being measured is higher than the maximum limit of the multimeter. It indicates that the circuit or component being tested has a resistance value that exceeds the range of the multimeter.

The frequency of cleaning an aircraft exterior depends on environmental conditions. Different environments can subject the aircraft to varying levels of dirt, dust, pollution, and other contaminants. These factors can accumulate on the aircraft's exterior, affecting its performance and appearance. Therefore, the more severe the environmental conditions are, the more frequently the aircraft will need to be cleaned to maintain its operational efficiency and aesthetic appeal.

Preventive maintenance refers to the proactive measures taken to prevent equipment failure and ensure its readiness and availability when needed. It involves regular inspections, cleaning, lubrication, and replacement of worn-out parts to keep the equipment in optimal working condition. By identifying and addressing potential issues beforehand, preventive maintenance reduces the risk of unexpected breakdowns and minimizes downtime. This type of maintenance is crucial for maximizing equipment lifespan, optimizing performance, and avoiding costly repairs or replacements.

Quality assurance is responsible for investigating dropped objects in most units. Quality assurance is a department or function within an organization that is responsible for ensuring that products or services meet specified requirements and standards. This includes investigating incidents or issues such as dropped objects to identify the root cause, implement corrective actions, and prevent future occurrences. Quality assurance personnel are trained in identifying potential hazards, conducting investigations, and implementing safety measures to prevent accidents and maintain a safe working environment.

The maintenance superintendent is the lowest person authorized to clear a red X when a lost tool cannot be located. This individual is responsible for overseeing and managing maintenance operations, ensuring that all necessary tools and equipment are accounted for. They have the authority to clear a red X, indicating that the aircraft is safe for flight even if a tool is missing. The crew chief may have limited authority and the wing commander and aircraft engineer are typically higher-ranking positions with different responsibilities.

The correct answer is 45 degree angle at either side. The noise intensity of a jet engine is greatest toward the rear at a 45 degree angle at either side. This is because the noise generated by a jet engine is primarily caused by the exhaust gases and the turbulence created by the high-speed exhaust flow. As the exhaust gases move away from the engine, they spread out and disperse, resulting in a decrease in noise intensity. Therefore, the noise is most intense at a 45 degree angle at either side, where the exhaust gases are still concentrated but have started to disperse.

The correct answer is that the required inspection and servicing are complete. This means that all necessary checks and maintenance tasks have been carried out on the aircraft, ensuring that it is in proper working condition and ready for operation. The other options mentioned, such as being released by production scheduling, resolving minor discrepancies, and checking aircraft forms, may also be important steps in the operational readiness process, but they are not the primary factor that determines if an aircraft is operationally ready.

The major drawback of using pneumatic lifting bags is instability. This means that the bags may not provide a stable lifting platform, which can be problematic when trying to lift heavy objects. Instability can lead to accidents or damage to the objects being lifted.

The correct answer is 1,000 watt lamp fixtures. The FL-1D floodlight consists of two lamp fixtures, each with a power rating of 1,000 watts.

Channel lock pliers should not be used to tighten cannon plugs because they can easily damage the plugs due to their strong grip. Cannon plugs are delicate and require a gentle touch to avoid any harm. Therefore, using channel lock pliers can potentially cause harm to the plugs and should be avoided.

The correct answer is "end of runway" because it is the location where the inspection is typically conducted just before takeoff. This inspection ensures that all systems are functioning properly and ready for the flight. It is crucial to perform these operational checks to ensure the safety and efficiency of the aircraft before it takes off.

The correct answer is organizational, intermediate, or depot. This is because the Air Force's maintenance capabilities are categorized into three levels: organizational, intermediate, and depot. The organizational level refers to maintenance performed by the unit itself, such as basic repairs and inspections. The intermediate level involves more complex repairs and overhauls that are typically performed at specialized maintenance facilities. The depot level is the highest level of maintenance capability, involving extensive repairs, modifications, and overhauls performed at dedicated depot facilities.

Sodium bicarbonate is the correct solution used to treat areas affected with electrolyte from a lead-acid battery. Sodium bicarbonate, also known as baking soda, is a mild alkaline substance that can neutralize the acidic electrolyte. It helps to prevent further damage and corrosion caused by the electrolyte.

To ensure accuracy and reliability, it is recommended to cycle the torque wrench through the breakaway torque at the maximum setting at least six times before using it. This process helps to condition the internal components of the wrench and ensure that it is properly calibrated and ready for use. By doing this, any inconsistencies or variations in the wrench's performance can be identified and corrected, guaranteeing accurate torque measurements during its operation.

Magnetic particle inspection is a non-destructive testing method used to detect surface and near-surface defects in materials. It involves applying a magnetic field to the object and then applying iron particles to the surface. If there are any defects present, the particles will be attracted to them and create a visible indication. However, this method is not suitable for searching for lost tools as it requires direct contact with the surface being inspected, which would not be possible if the tool is lost or hidden.

The A/M32A-60 is the unit capable of providing AC and DC electrical power, as well as pneumatic power, for ground maintenance. This unit is specifically designed for this purpose and is widely used in various maintenance operations. It is a versatile and reliable unit that can meet the power requirements of different equipment and systems during ground maintenance tasks.

When securing bolts using the double-twist safetying method, the maximum number of bolts that can be wired in a series is three. This method involves passing a wire through the heads of the bolts and twisting it twice to secure them. By limiting the number of bolts to three, it ensures that the wire can be properly twisted and tightened, providing a secure and reliable fastening.

Aircraft oxygen servicing or draining is prohibited within 50 feet of hangars or structures. This restriction is in place to ensure safety and prevent potential hazards such as fire or explosion. Oxygen is highly flammable and can react violently with certain materials, so it is important to maintain a safe distance from any structures that could potentially ignite or be damaged by such a reaction. By enforcing this prohibition, the risk of accidents and damage is minimized.

During desert operations, lubrication should be done only when necessary and then sparingly. This is because the desert environment is extremely dry and dusty, which can cause excessive wear and tear on aircraft components. Lubrication is necessary to reduce friction and prevent damage, but excessive lubrication can attract and trap dust particles, leading to further damage. Therefore, lubrication should be done only when necessary to ensure proper functioning of the aircraft, and it should be done sparingly to avoid excessive buildup of dust and debris.

Crane hoisting is a method of aircraft hoisting that is only used in emergencies when no other method is available. This implies that crane hoisting is not the preferred or commonly used method for lifting aircraft, but rather a last resort option. In emergency situations where other methods like lifting bags, cribbing, or aircraft jacking are not feasible or accessible, a crane can be used to lift the aircraft.

The correct answer is "Left side of the diagram to the right side of the diagram." In schematics, the flow of information or actions is typically represented from left to right. This means that the system initiating the action is usually located on the left side of the diagram, and the resulting action or outcome is shown on the right side. This directional flow helps users to follow the logical sequence of events and understand how different components or systems interact with each other.

The correct answer is B-4 because a scissor-type maintenance stand is typically used for working on aircraft. The scissor-type stand is designed to provide stability and height adjustment, making it easier for mechanics to access different areas of the aircraft during maintenance and repair tasks.

For maximum locking effect, at least two threads must be showing through a self-locking nut. This is because the self-locking nut relies on friction between the nut and the bolt threads to prevent loosening. With only one thread showing, there may not be enough contact area to generate sufficient friction and prevent loosening. However, with two threads showing, there is a larger contact area, increasing the friction and enhancing the locking effect. Therefore, the minimum requirement for maximum locking effect is two threads showing through the self-locking nut.

Corrosion or deterioration of a metal part continues until the part is exhausted or salvaged. This means that the corrosion process will keep occurring until the metal part is completely worn out or until it is salvaged, which involves repairing or restoring the part to its original condition. Chemical treatment, heat treatment, and painting may help slow down the corrosion process, but they do not completely stop it. Therefore, the most effective solution to prevent further corrosion is to either use the part until it is no longer usable or salvage it.

When different metals are in contact with each other and an electrolyte, galvanic corrosion can occur. This is because the metals have different electrochemical potentials, causing one metal to act as an anode and the other as a cathode. The electrolyte provides a medium for the flow of ions, completing the galvanic cell. This leads to the transfer of electrons from the anode to the cathode, resulting in the corrosion of the anode.

A pamphlet is a non-directive publication that can provide guidance on completing forms, but it does not have the authority to enforce what is written on the form. It is a informative resource that can cite forms and offer instructions, but it does not have the power to enforce compliance or dictate what should be included on the form.

The lifting of an aircraft jack is called a "ram" because a ram is a hydraulic device that converts hydraulic pressure into mechanical force, allowing for the lifting or pushing of heavy objects. In the context of an aircraft jack, a ram is used to provide the necessary force to raise the aircraft off the ground for maintenance or other purposes.