2A852 CDC Volume 2

VHF (Very High Frequency), UHF (Ultra High Frequency), and HF (High Frequency) are all types of radio frequencies used for communication. However, ATF is not a recognized type of radio frequency.

The correct answer is 781K. The 781K AFTO form is used to record essential inspection and delayed maintenance data. This form is specifically designed for recording information related to aircraft inspections and maintenance that may have been delayed or deferred. It allows for accurate documentation of any essential inspections or maintenance tasks that were not performed on schedule, ensuring that this information is properly recorded and addressed in a timely manner.

The center of gravity is the point at which the three axes (x, y, and z) intersect. It is the average position of the weight distribution of an object. This point is important for determining the stability and balance of an object.

The cure time of sealant depends on two factors: temperature and relative humidity. Temperature affects the chemical reaction that occurs during the curing process, as higher temperatures can accelerate the reaction and shorten the cure time. Relative humidity, on the other hand, affects the moisture content in the air, which can also impact the curing process. Higher humidity levels can slow down the curing process, while lower humidity levels can speed it up. Therefore, both temperature and relative humidity play a crucial role in determining the cure time of sealant.

To determine the exact length of insulation to strip from a wire, it is best to refer to the appropriate wiring technical orders (TO). These technical orders provide specific guidelines and instructions for various wiring tasks, including stripping insulation from wires. By referring to the TO, one can ensure that the correct length of insulation is stripped, ensuring proper electrical connections and preventing any potential issues or hazards.

The AFTO Form 245 is used as a continuation sheet for Part V of the AFTO Form 244. This means that it is an additional page that is attached to the AFTO Form 244 in order to provide more space for recording information in Part V. It allows for the continuation of documentation without having to use multiple copies of the AFTO Form 244.

The signature in the AFTO Form 781H, exceptional release block indicates that the aircraft is safe for flight. This means that all necessary inspections, servicing, and maintenance have been completed and the aircraft is deemed ready and safe to take off and fly.

The correct answer is "handled with care at all times." This is because compressed gas cylinders can be dangerous if mishandled or dropped. They contain highly pressurized gases and can explode or cause injury if not handled properly. Therefore, it is important to always handle them with care and follow proper safety protocols to ensure the safety of oneself and others.

The primary flight line fire extinguisher is generally a 150 pound Halon. This type of fire extinguisher is commonly used in aviation because it is effective in quickly suppressing fires and does not cause damage to sensitive electronic equipment. Its size and weight make it suitable for use on the flight line, where it can be easily transported and operated by personnel in case of an emergency.

Reviewing the aircraft forms is the most appropriate step to identify potentially hazardous conditions prior to performing aircraft maintenance. Aircraft forms contain important information about the aircraft's maintenance history, any reported issues or malfunctions, and any previous maintenance work done. By reviewing these forms, maintenance personnel can gain valuable insights into the condition of the aircraft and identify any potential hazards or areas that require attention before starting maintenance tasks. Removing safety pins, grounding the aircraft, and removing streamers are also important steps in ensuring safety during maintenance, but they do not specifically address the identification of potentially hazardous conditions.

Gaskets must be properly seated during installation to avoid leaks. When a gasket is not properly seated, there can be gaps or uneven pressure distribution, which can result in fluid or gas leakage. Proper seating ensures a tight seal between the mating surfaces, preventing any leakage and maintaining the integrity of the system.

Aircraft panels are sealed to provide protection against corrosion. Corrosion is a natural process that occurs when metals are exposed to moisture and oxygen, leading to the gradual deterioration of the metal surface. By sealing the panels, the aircraft's structure is shielded from these corrosive elements, ensuring its longevity and safety. This is especially important for aircraft, as they are exposed to various environmental conditions during flight, including humidity and precipitation. Sealing the panels helps to prevent corrosion and maintain the structural integrity of the aircraft.

The AF Form 1492, Warning Tag, will never be used in-flight. This suggests that there is no circumstance or situation where this form is required or relevant during a flight.

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The AFTO forms 781H and 781J are used to document airframe time. These forms are specifically designed for recording maintenance and inspection activities related to the airframe. The 781H form is used to document scheduled inspections, modifications, and repairs, while the 781J form is used to document unscheduled maintenance and repairs. Together, these forms provide a comprehensive record of the airframe's maintenance history and help ensure the aircraft's airworthiness.

The correct answer is "Never, even if you entered them in error." This means that you should never erase symbols that you entered on the AFTO Form 781A, even if you made a mistake. The reason for this is that any changes or corrections should be made by crossing out the incorrect information with a single line, initialing and dating it. This ensures that a clear audit trail is maintained and any changes can be traced back to the original entry. Erasing the symbols would not provide a clear record of the correction.

In the corrective action block of the AFTO Form 781A for Red X discrepancies, the required information is the complete technical order reference. This means that the person filling out the form needs to provide the specific technical order that outlines the correct procedure or action to be taken in order to rectify the Red X discrepancy. This information is crucial for ensuring that the correct and approved procedures are followed during the corrective action process.

Each discrepancy discovered, excluding battle damage, is recorded on AFTO Form 781A.

During flight, an aircraft needs to overcome gravity in order to stay airborne. Lift is the force that enables the aircraft to do so. It is generated by the wings of the aircraft as a result of the air flowing over and under them. The shape of the wings, along with the angle of attack, creates a pressure difference that generates lift. This upward force counteracts the downward force of gravity, allowing the aircraft to stay in the air and maintain flight.

Twisting an optic fiber during installation or maintenance can cause the glass fibers inside the fiber to become misaligned. This misalignment can lead to increased scattering of light and reduced transmission efficiency, resulting in reduced optical power transmission.

Before installing a splice, it is necessary to remove the insulation from the wire. This is because the insulation acts as a barrier and needs to be removed in order to establish a secure connection between the wires. By removing the insulation, the bare wires can be properly joined together, ensuring a reliable and effective splice.

The basic post-flight inspection is performed after the last flight of a specified flying period. This means that it is conducted once all flights for a particular period have been completed. This inspection is important to check the overall condition of the aircraft after a series of flights and ensure that it is safe and ready for the next flying period.

The correct answer is air conditioning. Cabin pressurization is the process of pumping air into the aircraft cabin to maintain a comfortable and safe environment for passengers and crew at high altitudes. Air conditioning systems are responsible for regulating the temperature and humidity inside the cabin, and they also play a crucial role in maintaining the desired cabin pressure. By controlling the air pressure, air conditioning systems ensure that passengers can breathe comfortably and prevent any potential health issues that may arise due to low oxygen levels at high altitudes.

The given options are all components related to the propulsion system. Oil distribution is responsible for lubricating the engine, the accessory drive provides power to various components, and fuel distribution ensures proper fuel supply. However, an oxygen converter is not part of the propulsion system. It is typically used in the air intake system to convert oxygen into a more usable form, such as in an oxygen sensor for engine control.

A flight preparedness check is a type of inspection that is conducted before a flight to ensure that the aircraft is in a suitable condition for takeoff. This inspection includes checking the fuel levels, engine oil, control surfaces, and other crucial components to ensure that everything is functioning properly. The pre-flight inspection is essential for ensuring the safety and readiness of the aircraft before it takes off.

Using a new gasket is a good practice when installing a gasket because it ensures a proper seal and reduces the risk of leaks. Reusing a gasket can lead to uneven compression and loss of elasticity, which can result in leaks and damage to the gasket. Using a new gasket also allows for a clean and smooth surface, promoting better sealing and preventing the entrapment of air. Using the opposite side of the gasket is not recommended as it may not provide a proper seal.

The phase inspection is designed to reduce the time an aircraft is out of commission for any given inspection. This type of inspection involves a thorough examination of specific components or systems of the aircraft, which allows for targeted maintenance and repairs to be completed efficiently. By focusing on specific areas during the phase inspection, the overall downtime of the aircraft can be minimized, ensuring that it can return to service as quickly as possible.

The AFTO form 781H is used to document maintenance status and servicing information. This form is specifically designed for recording historical data, including maintenance actions, inspections, and servicing details. It allows maintenance personnel to track the maintenance history of an aircraft or equipment, ensuring that all necessary maintenance tasks are completed and documented accurately. The 781H form is an essential tool for maintaining the overall readiness and reliability of aircraft and equipment.

The longitudinal or roll axis refers to the imaginary line that runs from the nose of the aircraft to the tail. This axis is responsible for controlling the roll motion of the aircraft, allowing it to bank and turn. The other options mentioned, such as top to bottom, fuselage to tires, and wingtip to wingtip, do not accurately describe the longitudinal axis of an aircraft.

The elevator is a flight control surface that is not found on the wing. It is located on the tail of an aircraft and is used to control the pitch or the up and down motion of the aircraft. The flaps, spoilers, and ailerons are all control surfaces that are found on the wings. Flaps are used to increase lift during takeoff and landing, spoilers are used to decrease lift and increase drag, and ailerons are used to control the roll or the side-to-side motion of the aircraft.

An electromagnetic pulse (EMP) hardened cable is designed to withstand the effects of an EMP, which can cause significant damage to electronic devices and their components. If the internal wires of the cable are damaged, it means that the cable's ability to transmit signals and protect against EMPs is compromised. As a result, the cable is considered nonrepairable because repairing the internal wires would require specialized equipment and expertise that may not be available locally.

The optical fiber is the component of a fiber optic cable that does not add tensile strength. Tensile strength refers to the ability of a material to withstand stretching or pulling forces. While the outer jacket, buffer jacket, and strength members are designed to provide additional strength and protect the delicate optical fiber, the fiber itself is not responsible for adding tensile strength to the cable. Its main function is to transmit light signals for communication purposes.

During deceleration, the velocity of the aircraft decreases, which affects the lift generated. In order to maintain lift, the angle of attack must be increased. Angle of attack refers to the angle between the wing's chord line and the oncoming airflow. By increasing the angle of attack, the wing can generate more lift even at lower speeds, compensating for the decrease in velocity during deceleration. This adjustment helps to counteract the decrease in lift and maintain the necessary upward force to keep the aircraft airborne.

Triaxial cable is used when further shielding is required. This type of cable consists of an inner conductor surrounded by two layers of shielding, which provides enhanced protection against electromagnetic interference. It is commonly used in applications where signal integrity and protection against external noise are critical, such as in high-frequency communications, instrumentation, and medical equipment. The additional shielding in triaxial cable helps to minimize signal loss and maintain signal quality, making it suitable for environments with high levels of electromagnetic interference.

The correct answer is AF Form 1492, WARNING tag. This form is used to flag a condition on an aircraft that could cause damage or injury if ignored. It is specifically designed to warn personnel about potential dangers associated with the condition. The other options listed, AFTO Form 244, AFTO Form 245, and AF Form 979, are not suitable for flagging conditions that could cause damage or injury.

The aircraft commander is responsible for checking the AFTO 781C before flight to ensure that the avionics equipment status aligns with the mission requirements. This includes verifying that all necessary equipment is functioning properly and ready for use. As the individual in charge of the aircraft and its operations, the aircraft commander plays a crucial role in ensuring the safety and success of the mission.

The aircraft maintenance technician is responsible for making entries on the AFTO Form 781J, Aerospace Vehicle - Engine Flight Document. This form is used to record important information about the engine's performance and any maintenance or inspections conducted on the aircraft. The aircraft maintenance technician plays a crucial role in documenting and maintaining the engine's flight history and ensuring the accuracy of the information recorded on the form.

The question asks for an Air Force inspection concept that is not included in the given options. The options provided are "Phased," "Periodic," and "Isochronal." These are all valid Air Force inspection concepts. Therefore, the correct answer is "Intermediate," as it is not an Air Force inspection concept.

Cable tensiometers are used to measure the specific degree of cable tightness. They are designed to determine the tension or force applied to a cable or wire, ensuring that it is within the desired range. This is important in various industries such as construction, telecommunications, and power distribution, as improper cable tightness can lead to performance issues or even failure of the cable system. By accurately measuring the tightness, cable tensiometers help ensure the safety and reliability of cable installations.

Deceleration is not one of the four forces at work on an aircraft in flight. The four forces are lift, thrust, gravity, and drag. Lift is the force that opposes gravity and allows the aircraft to stay airborne. Thrust is the force that propels the aircraft forward. Gravity is the force that pulls the aircraft towards the ground. Drag is the force that opposes the motion of the aircraft through the air. Deceleration refers to the act of slowing down or reducing speed, but it is not considered a separate force acting on the aircraft.

The engine indicating system is responsible for monitoring various parameters of the engine. Among the given options, the hydraulic temperature is not monitored by the engine indicating system. This means that the system does not provide information or alerts regarding the temperature of the hydraulic system.

Before working in a flight control surface area, it is important to disable and tag the system. This ensures that the system is not accidentally activated while maintenance or repairs are being carried out, which could lead to potential accidents or damage. By disabling and tagging the system, it serves as a clear visual indication to others that the system should not be operated. This precautionary measure helps to maintain safety and prevent any mishaps during maintenance procedures.

The isochronal inspection system is a periodic maintenance inspection where an aircraft is thoroughly checked for any discrepancies or issues. The inspections included in this system are typically more extensive and time-consuming, such as major inspections and home station checks. However, basic post-flight inspections are not specific to the isochronal inspection system as they are performed after every flight to ensure the aircraft is safe for the next flight. Therefore, basic post-flight inspections are not peculiar to the isochronal inspection system.

A torque wrench is a tool that measures the specific degree of tightness of nuts or bolts. It is designed to apply a specific amount of torque or rotational force to a fastener. By using a torque wrench, the user can ensure that the fastener is tightened to the correct specification, preventing over-tightening or under-tightening. This tool is commonly used in automotive, construction, and engineering industries to ensure the proper assembly and maintenance of equipment.

Kapton is a type of wire that provides high temperature resistance. It is known for its ability to withstand extreme temperatures, making it suitable for applications where heat resistance is required. Kapton wires are commonly used in industries such as aerospace, automotive, and electronics, where they are exposed to high temperatures and harsh environments. This type of wire is made from a polyimide material, which gives it excellent thermal stability and resistance to heat.

The bottom portion of the tag is used to provide a "cross-check" with the aircraft forms. This suggests that the information on the bottom portion of the tag is compared or verified against the information on the aircraft forms for accuracy and consistency.

Optoelectronic transducers in a fiber optic transmission convert optical energy to electrical energy. This means that they are able to receive the light signals transmitted through the fiber optic cable and convert them into electrical signals that can be further processed and utilized by other electronic devices or systems. This conversion is essential for the proper functioning and transmission of data in fiber optic communication systems.

A torque wrench is not accurate below 20 percent of its capacity. This means that when the torque applied is below 20 percent of the wrench's maximum capacity, the readings provided by the wrench may not be reliable or precise. It is important to operate the torque wrench within its specified range to ensure accurate torque measurements.

The nacelles of an aircraft provide access to perform engine maintenance and servicing. The nacelles are the streamlined structures that house the engines on an aircraft. They are designed to be easily accessible for maintenance purposes, allowing technicians to inspect and service the engines as needed. This includes tasks such as checking for any damage or wear, replacing components, and performing routine maintenance procedures to ensure the engines are functioning properly. The other options, windows, cargo door, and empennage, do not provide direct access to the engines for maintenance and servicing.

The correct answer is accelerometers. Inertial navigation systems use accelerometers to measure the acceleration of the vehicle in order to calculate its position and velocity. These accelerometers are mounted on the gyro-stabilized platform, which helps to maintain their orientation and stability. Capacitors, stable inductors, and thermal resistors are not typically components of the gyro-stabilized platform in an inertial navigation system.