Egress Journeyman 5 Level

The correct answer is mechanically-fired, cartridge-activated. This means that the mechanism for jettisoning the cockpit canopy on the A-10 aircraft is activated by a mechanical action, such as a lever or button, and the firing of a cartridge. The cartridge provides the necessary force to initiate the jettisoning process.

The unit Explosive Safety NCO is responsible for ensuring that explosive safety training is provided to applicable personnel. This individual is specifically trained in explosive safety protocols and regulations, and their role is to oversee and coordinate all aspects of explosive safety within the unit. They work closely with supervisors and unit commanders to ensure that all personnel receive the necessary training to safely handle explosives.

The hatch separation assembly horseshoe is responsible for sending energy transfer signals to the hatch rockets in the B-2 components. This suggests that the horseshoe mechanism is designed to initiate the separation of the hatch from the rest of the assembly. The other options, such as the delay initiators, are not directly related to the energy transfer signals required for hatch separation.

When assigned to a new egress system, you are required to learn the new system by attending an Air Education and Training Command (AETC) approved Egress Journeyman Course. This course is specifically designed and approved by the AETC to provide comprehensive training on egress systems. It covers all the necessary knowledge and skills required to operate and maintain the egress system effectively. By attending this course, you can ensure that you are properly trained and qualified to work on the specific egress system assigned to you.

Visual inspection is designed to detect discrepancies which may have developed due to wear and tear, or other damage, since the last inspection. This type of inspection involves visually examining the item or area being inspected to identify any visible signs of damage, deterioration, or other issues. It does not require specialized equipment or testing procedures, but rather relies on the inspector's observation skills. Visual inspections are commonly used in various industries, such as manufacturing, construction, and maintenance, to ensure the safety and integrity of equipment, structures, and systems.

For an automatic mode ejection in a B-1B aircraft, all mode selectors must be in the AUTO position. This means that both the pilots' mode selectors and the copilots' mode selectors need to be set to AUTO. The mode selectors control various functions and settings within the crew station, and having them all in the AUTO position ensures that the ejection process will be carried out automatically without any manual intervention.

A JCN, or Job Control Number, is used to tie all on- and off-equipment actions together. This means that it is used to track and manage all the tasks and actions related to the maintenance and operation of equipment, ensuring that they are properly coordinated and executed. By using a JCN, organizations can have a centralized system to monitor and control the various activities involved in maintaining and operating equipment, helping to streamline processes and improve efficiency.

Pitting corrosion is a localized form of corrosion that occurs on the surface of metals, forming small pits or holes. Aluminum and magnesium are most commonly associated with pitting corrosion. This is because both metals have a tendency to form protective oxide layers on their surfaces, but these layers can be easily disrupted, leading to the formation of pits when exposed to corrosive environments. Steel and titanium are not as commonly associated with pitting corrosion as aluminum and magnesium.

The repair cycle time of a DIFM (Do It For Me) item starts when the unserviceable item is removed from the aircraft or piece of equipment, and a demand is made on supply. This means that the repair cycle time begins when the faulty or damaged item is taken out of the aircraft or equipment and a request is made for a replacement or repair. This ensures that the repair process is initiated and the necessary steps are taken to fix or replace the item in a timely manner.

The Quality Assurance (QA) department is responsible for maintaining an up-to-date master technical order file. This department ensures that all technical orders are accurate, current, and in compliance with industry standards. They review and update the master technical order file regularly to ensure that any changes or updates are implemented. This helps to maintain the quality and reliability of the technical order documentation, which is essential for the smooth operation of any organization.

The handle under the left sill fires the internal initiator starting the event. This means that in an F-15 canopy jettison sequence initiated from inside the cockpit, the handle located under the left sill is responsible for firing the internal initiator, which starts the process of jettisoning the canopy.

The vice wing commander is responsible for ensuring an effective FOD prevention program is established. This individual holds a high-ranking position within the wing and has the authority to oversee and enforce the implementation of FOD prevention measures. They work closely with other personnel, such as QA and the FOD monitor, to ensure that all necessary steps are taken to prevent foreign object damage and maintain safety within the organization.

The correct answer is "change from SMDC detonation to gas pressure." This means that after the rocket catapult shielded mild detonating cord (SMDC) initiator has fired, it will transition from using SMDC detonation as the mechanism for propulsion to using gas pressure instead. This change in mechanism allows for the rocket catapult to continue functioning and provide the necessary propulsion for the emergency escape sequencing system on the F-15 aircraft.

As an egress journeyman, it is necessary to have weapons safety training before performing explosive-related tasks. This initial training is a prerequisite to ensure that the individual has the necessary knowledge and skills to handle weapons safely in such tasks. Additionally, it is important to undergo this training annually to refresh and update one's knowledge on weapons safety, as there may be new developments, regulations, or protocols that need to be followed. This regular training helps to ensure the continued safety and competence of the egress journeyman in handling weapons in explosive-related tasks.

One of the ways that data available within the maintenance-SBSS can be used is by managing time-change items. This involves keeping track of when certain parts need to be replaced or serviced based on their usage or lifespan. By effectively managing time-change items, maintenance personnel can ensure that necessary maintenance tasks are performed on time, reducing the risk of equipment failure and maximizing operational efficiency.

The correct answer is pilot and copilot. This means that both the pilot and copilot have the capability to initiate a fully automatic ejection sequence.

The hatch separation assembly horseshoe is the B-2 component that fires the hatch rockets when hatch jettison is initiated using the right external hatch jettison initiator.

Explosives need to be assigned a hazard classification in order to be stored safely. This classification helps to identify and communicate the level of danger associated with the explosive material. It takes into account factors such as the type of explosive, its physical and chemical properties, and the potential risks it poses. By assigning a hazard classification, appropriate storage and handling procedures can be implemented to ensure the safety of individuals and the surrounding environment. Without this classification, it would be difficult to determine the necessary precautions and protocols for storing explosives.

An action point is responsible for the resolution of a PQDR (Product Quality Deficiency Report). It refers to a specific step or task that needs to be taken in order to address and resolve the issue mentioned in the PQDR. The action point could involve investigating the root cause of the problem, implementing corrective measures, or coordinating with relevant stakeholders to fix the deficiency. By completing the action point, the PQDR can be resolved effectively.

The correct answer is 0.3 TDI. This means that the B-1B time delay initiator fired by the SMDC from the seat ejection sequencing AND gate is set to 0.3 TDI.

To perform a periodic inspection of an explosive operation properly, it is important not to limit the inspection to one area. By inspecting multiple areas, you can ensure that all aspects of the operation are thoroughly examined and any potential issues or hazards are identified. This approach allows for a comprehensive assessment of the entire operation, rather than focusing on only one aspect. It helps to ensure the overall safety and effectiveness of the explosive operation.

In the PQDR system, repairs to exhibits will only be carried out if they are authorized by the action point. This means that the action point has the authority to approve or deny repairs to exhibits. The originating point refers to where the PQDR was first initiated, the screening point is where the PQDR is reviewed and evaluated, and the support point is where assistance and resources are provided. However, it is the action point that ultimately has the power to authorize repairs.

If all mode selectors are placed in the manual mode and the pilot initiates ejection, only the pilot's seat will eject. This means that the other seats, including the copilot's and DSO's seats, will not eject in this scenario.

The hatch separation assembly horseshoe provides a way to sever the escape hatch to permit separation from the B-2 during an emergency ground egress. This assembly is specifically designed to facilitate the safe and efficient separation of the hatch, allowing the individuals inside the B-2 to exit in case of an emergency. The term "horseshoe" likely refers to the shape or configuration of the assembly, which may resemble the outline of a horseshoe.

The MDD process allows for on-line retrieval of data through user inquiry only. It does not provide for hard copy retrieval or offline retrieval of data.

The ejection control initiators provide gas pressure to fire the gas-SMDC initiators.

MAJCOM, or Major Command, is responsible for assigning additional DIFM (Dropped from Inventory, but not Maintenance) status codes to cover special situations. This implies that MAJCOM has the authority and capability to designate specific codes for items that have been removed from inventory but still require maintenance. The other options, such as maintenance squadron, headquarters US Air Force, and repair cycle support system, do not have the same level of authority or responsibility in assigning these status codes.

DIFM pickup points are usually checked on a weekly basis. This means that the points where customers drop off their items for professionals to handle are inspected once every week. Checking the pickup points weekly ensures that any items left behind are promptly collected and that the area is clean and organized for the next round of pickups. This regularity helps maintain efficiency and customer satisfaction in the DIFM service.

The SMDC-gas initiator is the component used to fire the ejection seat rocket catapult on the B-1B. This initiator combines the gas and solid propellant to generate the necessary pressure and force to activate the ejection seat. It is a crucial component in ensuring the successful deployment of the ejection seat during emergency situations.

The correct answer is thruster. During the jettison of the F-22 canopy, the initial aft movement of the canopy is accomplished by the thruster. This thruster provides the necessary force to propel the canopy away from the aircraft. The thruster is specifically designed for this purpose and is activated at the time of jettison to ensure a smooth and efficient separation of the canopy from the aircraft.

When the 1.0-second delay initiator on the T-38 ignites, it disconnects the lapbelt buckle and actuates the seat-man separator. This means that the initiator triggers two actions simultaneously. First, it disconnects the lapbelt buckle, which would release the pilot from the seat. Second, it actuates the seat-man separator, which would separate the seat from the pilot. This ensures that the pilot is safely ejected from the aircraft in case of an emergency.

The correct answer is "toggle switch that is spring-loaded off from both the up and down positions." This means that the switch automatically returns to the off position when released, regardless of whether it was in the up or down position. This ensures that the canopy operation is controlled and consistent, as the switch will always return to the off position after being toggled.

The correct answer is Operations group. The basic mission of the Air Force is performed by the Operations group. This group is responsible for conducting and supporting military operations, including air combat, air superiority, and air defense. They are in charge of planning, organizing, and executing missions to achieve the objectives of the Air Force. The Operations group plays a crucial role in ensuring the readiness and effectiveness of the Air Force in carrying out its missions.

Category II PQDRs must be submitted within 3 working days after the discovery of a deficiency. This means that once a deficiency is identified, the responsible party has a maximum of 3 working days to submit the PQDR. This ensures that any issues or deficiencies are reported and addressed promptly, allowing for timely resolution and improvement in the product or system.

The horizontal seat positioning actuator is responsible for providing forward and aft movement of the B-1B seat carriage. This component allows the seat to be adjusted horizontally, allowing for optimal positioning and comfort for the occupant.

During the operation of the F-15 emergency escape sequencing system, the gas pressure at the ejection seat causes a change in the velocity of the gas-shielded mild detonating cord (SMDC). This change in velocity triggers the SMDC to detonate, which then leads to the initiation of the flexible linear shaped charge (FLSC). Finally, the FLSC initiates the detonation transfer assembly (DTA), resulting in its detonation.

Category I PQDRs must be submitted to the screening point within 1 workday after the discovery of a deficiency. This means that as soon as a deficiency is identified, it must be reported to the appropriate screening point within one workday. This ensures that immediate action can be taken to address and rectify the deficiency, minimizing any potential risks or impacts.

The given correct answer states that messages to report PQDRs are used when automated means are not feasible. This means that if there is a situation where automated systems or processes cannot be used to report a PQDR (Product Quality Deficiency Report), then messages are used as an alternative method. This could be due to technical limitations, system failures, or any other reason that prevents the use of automated means.

The egress section supervisor is responsible for ensuring the accuracy of the IMDS time change database. This individual oversees the egress section, which is responsible for managing and maintaining the database. They are in charge of ensuring that all changes and updates to the database are accurate and up to date. The egress section supervisor plays a crucial role in maintaining the integrity of the database and ensuring that it is reliable for its intended purposes.

Egress explosives must be carried in protective containers to ensure their safe transportation and handling. These containers are specifically designed to contain and mitigate the risks associated with explosive materials. They are equipped with features such as sturdy construction, impact resistance, and insulation to prevent accidental detonation or leakage. By using protective containers, the potential hazards and dangers of transporting explosives can be minimized, protecting both individuals and the environment.

A prick punch is used to mark soft metal. It has a sharp, pointed tip that is used to make small indentations or marks on the surface of the metal. These marks can be used as reference points for drilling, cutting, or shaping the metal. The sharpness of the prick punch allows for precise and accurate marking on soft materials without causing significant damage or deformation.

The MC-1A air compressor unit uses a gasoline engine.

Ions are atoms or groups of atoms that are either positively or negatively charged due to the loss or gain of electrons. They are formed when atoms gain or lose electrons to achieve a stable electron configuration. This charge difference between ions allows them to attract and interact with other ions or molecules, leading to various chemical reactions and processes.

ERRC stands for "Economic Recovery and Reconstruction Cluster," which is a framework used in humanitarian response to identify and address the recovery needs of a community after a crisis or disaster. Within this framework, consumable items are identified by the code XB3. Therefore, the correct answer is XB3.

After closing the canopy of an F-15 aircraft, it is recommended to wait for 10 seconds before moving the canopy control handle to the LOCK position. This waiting period allows the canopy to fully settle into the correct position and ensures a secure and proper seal. Moving the handle too quickly may result in an improper lock, compromising the safety and integrity of the canopy.

The unit of measurement for electromotive force (EMF) is volt. Volt is the SI unit for measuring electric potential difference, which is the driving force that pushes electric charges through a circuit. EMF is commonly associated with batteries and power sources, and it represents the amount of electrical energy provided per unit charge. Therefore, volt is the correct unit for measuring EMF.

Moving the control handle to the UP position in an F-15 canopy releases the liquid lock on the canopy actuator. This allows the actuator to move downward and operate the locking mechanism, thus manually opening the canopy.

The canopy actuated initiator is the component that activates the fired warning indicator. This means that when the canopy is opened or closed, it triggers the warning indicator to indicate that a firing has occurred.

The problem should be corrected by tightening the bolt in the grip assembly pivot attachment, within torque limits. This means that the bolt should be tightened to the specified torque value to ensure that it is secure and functioning properly. This will help to ensure the proper rotation of the firing control handle in the ACES II seat initiator firing mechanism.

The rocket motor is the component that provides the rotational force needed to lift the canopy off the F-22 aircraft. The rocket motor generates the necessary thrust to propel the canopy upwards, allowing it to be lifted off the aircraft. It is responsible for creating the force required to overcome the weight of the canopy and initiate its movement.

The first part of a TO number identifies the technical system or equipment category. This means that the initial portion of the TO number is used to classify the type of system or equipment that the TO pertains to. This classification helps in organizing and categorizing the TOs for easy reference and retrieval. It allows users to quickly identify the relevant TOs based on the equipment category, ensuring that the correct instructions are followed for a specific system or equipment.

The first part of the TO number determines the type of equipment found in the TO.

When determining the extensiveness and frequency of corrosion inspections, air pollution should be taken into consideration. Air pollution can contribute to the corrosion process by introducing pollutants and chemicals into the atmosphere, which can react with the surface of materials and accelerate corrosion. Therefore, understanding the level of air pollution in a particular area is important in order to assess the potential impact on the corrosion rate and determine the appropriate frequency and extent of inspections.

The flight crew is responsible for installing the bottom bailout safety pins on the B-1B. This means that it is their duty to ensure that these safety pins are properly installed to ensure the safety of the aircraft and its crew. The flight crew is trained and responsible for various tasks related to the aircraft's operation and safety, and installing the bottom bailout safety pins is one of these important responsibilities.

Category II PQDRs are classified as enhancement, deficiency, or improvement reports. This means that these reports can be related to any of these three categories. Category II PQDRs are used to identify and document any issues or problems with a product or system, as well as any potential enhancements or improvements that can be made. By classifying these reports as enhancement, deficiency, or improvement, it allows for a comprehensive assessment of the product or system's performance and potential areas for development.

The correct answer is "between the forward and aft crew stations on the center aisle left wall." This means that the bottoom bailout initiator is located on the left wall of the center aisle, specifically between the forward and aft crew stations.

The bench stock support element is responsible for determining whether a bench stock increase or decrease is temporary or permanent for a first-time request. They have the knowledge and expertise to assess the demand and usage patterns of the item, as well as consider any specific circumstances or factors that may affect its availability. Therefore, they are best equipped to make an informed decision regarding the duration of the stock adjustment.

The three priorities for technical order deficiency reports are emergency, urgent, and routine. This means that when reporting a deficiency, it is important to prioritize based on the level of urgency and severity. Emergency reports are for critical and immediate issues that require immediate attention and action. Urgent reports are for issues that need to be addressed quickly but are not as critical as emergencies. Routine reports are for less urgent matters that can be addressed in a timely manner.

In the event that each crew member needs to jettison both canopies on a T-38 aircraft while in flight, they would pull both T-handles. This means that each crew member is responsible for jettisoning the canopy in their respective cockpit by pulling the T-handle located there. Pulling both T-handles ensures that both canopies are successfully jettisoned, ensuring the safety of the crew members.

If there are no major command (MAJCOM) weapons safety training plans available, the responsibility for developing a local one falls on you or the personnel in your section.

The correct answer is AFT. In order to allow either crewmember to eject both ejection seats, the eject mode selector valve must be in the AFT position on the F-16 aircraft. This position enables both crewmembers to initiate ejection from either seat, providing flexibility and safety in emergency situations.

The correct answer is 2.0 inches. On the F-22, the canopy thruster extension separates into two segments and disconnects the canopy from the actuator after a thruster extension of 2.0 inches.

When an egress explosive component is found with a noncorrectable defect, the best action to take is to submit a material deficiency report. This report allows for the identification and documentation of the defective component, ensuring that appropriate actions can be taken to address the issue. By submitting the report, the necessary steps can be taken to either repair or replace the defective component, ensuring the safety and functionality of the equipment.

Once the canopy on an F-16 aircraft engages the aircraft sill, the locking pawl will disengage from the locking cam. This disengagement allows for the rotation of the latching system.

The aircraft inspection process is broken down into four phases. These phases are designed to ensure that the aircraft is properly maintained and safe for operation. Each phase focuses on different aspects of the aircraft, such as the structure, systems, and components. By breaking down the inspection process into multiple phases, it allows for a thorough examination of the aircraft and helps to identify any potential issues or maintenance needs.

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Torque wrenches used for maintenance of aircraft and other critical equipment need to be regularly checked and calibrated to ensure their accuracy and reliability. The interval at which they should be checked may vary depending on the specific requirements and regulations of the industry. In this case, the correct answer is 60 days, indicating that these torque wrenches should be checked and calibrated every two months to maintain their effectiveness and precision.

The correct answer is SMDC detonation. This means that the 3.2-second time delay initiator on the B-1B is activated by the detonation of an SMDC (Standard Missile Defense Control) system. This suggests that the initiator is designed to be triggered by an explosion or detonation, possibly as a safety measure or as part of a larger defense system. It is likely that the SMDC detonation sends a signal or releases energy that triggers the time delay initiator.

A gate is a component that is used to direct or redirect force in a preplanned order. It acts as a barrier or control mechanism to regulate the flow of a substance or energy. Gates are commonly used in various industries and systems, such as hydraulic systems, irrigation systems, and process control systems, to control the direction and flow of fluids or materials. They can be opened or closed to allow or restrict the passage of the substance or energy, ensuring that it flows in a desired and controlled manner.

The OSO is responsible for managing the flying hour program, wing AFE, and flight simulator systems. This means that they oversee and coordinate the allocation of flying hours for pilots, ensuring that they have enough training and practice time. They also manage the wing AFE (Aircrew Flight Equipment), which includes the maintenance and distribution of equipment necessary for flight operations. Additionally, they are in charge of the flight simulator systems, which are used for training and simulation exercises. Overall, the OSO plays a crucial role in ensuring the smooth and efficient operation of the flying hour program and flight simulator systems within the organization.

The correct answer is 6 because the AFTO Form 349 is designed to record maintenance actions, and it has space for up to 6 entries. This means that a maximum of 6 maintenance actions can be recorded on a single form.

The interrupter is the B-1B component that blocks SMDC detonation to the ejection seat components when the external hatch jettison initiators have been fired. It acts as a barrier or switch that prevents the detonation from reaching the ejection seat components, ensuring the safety of the occupants during the hatch jettison process.

If the B-1B is disabled and the OSO pulls the ejection control handles while all mode selectors are in AUTO, only the OSO will be ejected. The other crewmembers, including the pilot and copilot, will not be ejected.

The correct answer is 3. This means that there are three external hatch jettison initiators installed on the B-1B aircraft. These initiators are responsible for initiating the jettisoning of external hatches, which are used for various purposes such as emergency exits or access to certain areas of the aircraft. Having multiple initiators ensures redundancy and allows for the safe and efficient operation of the hatch jettison system.

The "E" in Ohm's law formula stands for voltage. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, and inversely proportional to the resistance of the conductor. Therefore, "E" represents the electrical potential difference or voltage in the formula.

The MDD system provides equipment maintenance schedules based on the calendar. This means that the maintenance schedules are determined by specific dates on the calendar, rather than being based on the number of hours, months, or quarters that have passed. Using the calendar allows for more precise scheduling and ensures that maintenance tasks are performed at regular intervals throughout the year.

The other characteristics of the MDD concept, in addition to categories of documentation and data codes, are documentation rules and data entry. These characteristics refer to the guidelines and regulations for documenting and entering data into the MDD system. They ensure that the documentation is accurate, consistent, and follows a standardized format, while also ensuring that the data entered into the system is valid and reliable.

The maximum time delay allowed for crew compartment depressurization on the B-2 is 2.75 seconds.

Combination pliers are used to bend heavy gauge steel cotter pins. These pliers have a strong grip and a long handle, allowing for better leverage when working with heavy materials like steel. They also have a cutting edge near the pivot point, which can be used to cut the cotter pins if needed. Needle nose pliers have a pointed tip and are better suited for precision work, while vice grips are designed for locking and holding objects in place. Duck bills pliers have a wide, flat tip and are typically used for gripping and pulling.

If the canopy actuator is not secured to the F-15 aircraft structure before disconnecting it from the canopy, it can cause damage to the titanium lines. This is because the actuator is responsible for controlling the movement of the canopy, and if it is not properly secured, it can cause the titanium lines to become misaligned or damaged. The titanium lines are crucial for the proper functioning of the canopy, and any damage to them can lead to issues with the canopy's operation.

The correct answer is "catapult cartridge". Recovery sequencer thermal batteries on the B1-B are activated by the gas pressure generated from the catapult cartridge. This cartridge provides the necessary force to launch the aircraft from the catapult, and the gas pressure produced during this process is utilized to activate the thermal batteries.

The correct answer is "energy transfer". In the context of the question, the B-1B AND gate component is responsible for detonating explosive transfer lines, which in turn activates the forward hatch severance system. This suggests that the energy transfer mechanism is used to initiate the necessary actions for the hatch jettison process.

Either D-handle would be used to jettison both canopies on a T-38.

The correct answer is "depressing the release button to engage the control handle and turning the handle clockwise to the UP position" because this is the correct sequence of actions to open the F-15 canopy. By depressing the release button, the control handle is engaged, and then turning the handle clockwise will cause the canopy to move upwards to the fully open position.

The maintenance group commander is responsible for ensuring that maintenance is only performed by personnel who are trained, qualified, and certified, unless under direct supervision of a trainer or certifier. This role oversees the entire maintenance group and has the authority to enforce these requirements and ensure that all personnel are following proper procedures and protocols. The wing commander and squadron commander may have some oversight in this area, but the maintenance group commander is specifically tasked with ensuring the qualifications and certifications of maintenance personnel.

The gas pressure from the 0.3-second delay initiator on the U-2 aircraft goes through the bypass valve to activate the drogue gun, shoulder harness reel, rocket catapult, and the 1.0-second delay initiator. This means that the gas pressure is used to initiate the deployment of the drogue gun, release the shoulder harness reel, activate the rocket catapult, and trigger the 1.0-second delay initiator.

The 0.15-second delay initiator is designed to ensure that the hatch is clear of the ejection seat path before the seat ejection on the B-2. This delay allows enough time for the hatch to fully open and move out of the way before the ejection seat is activated. It is crucial for the safety of the pilot, as it prevents any potential collisions or obstructions between the hatch and the ejection seat during the ejection process.

The carriage seat retract thruster output cartridge arms the seat ejection sequencing AND gates during ejection. This means that it is responsible for activating the mechanism that controls the sequencing of the seat ejection process.

The first and second characters of the worldwide identification (ID) are used to indicate the personnel assignment system code (PAS). This code is used to identify the specific personnel assignment or job role within a unit or organization. It helps to track and manage personnel assignments and responsibilities.

The time change subsystem automates the record keeping function for all end items of equipment as well as for items installed on an end item of equipment. This means that it is responsible for maintaining accurate records of when equipment and items were last serviced or had any changes made to them. It helps ensure that maintenance schedules are followed and that equipment is properly maintained.

There are five sequence valves installed in the B-2 explosive devices subsystem.

Corrosion is a chemical process that occurs when certain conditions are present. These conditions include the presence of a corrosive substance, such as oxygen or moisture, the presence of a metal or alloy that can be corroded, an electrolyte to facilitate the transfer of electrons, and an electrochemical cell to drive the corrosion process. Therefore, four conditions must exist for corrosion to occur.