2r051 Edit Code 5 Volume 4 - Study Guide / Answers

Mean time to repair (MTTR) is a metric used to measure the average time it takes to repair a system or component after a failure. It is commonly expressed in hours because it provides a more detailed and precise measurement compared to larger units such as days or minutes. Expressing MTTR in hours allows for better tracking and analysis of repair times, enabling organizations to identify areas for improvement and optimize their maintenance processes.

The standard for on-time departure when used for the departure reliability rate is within 14 minutes of the scheduled departure time. This means that if a flight departs within 14 minutes of its scheduled departure time, it is considered to be on time. Any departure that occurs after the 14-minute mark would be considered a delay.

Depot maintenance is considered the highest level of maintenance for more complex repairs. Depot maintenance involves extensive repairs and overhauls that cannot be performed at lower levels of maintenance. It typically includes the repair or replacement of major components and systems, as well as extensive testing and refurbishment. This level of maintenance is usually carried out at specialized facilities, such as depots, where there are specialized equipment, tools, and skilled personnel available to handle complex repairs.

The first step in the analysis process is to collect the data. This is because without data, there is nothing to analyze. Collecting the data involves gathering relevant information from various sources, such as surveys, interviews, observations, or existing databases. Once the data is collected, it can then be manipulated, compared, and verified in subsequent steps of the analysis process.

Delayed discrepancies are referred to as awaiting parts (AWP) or awaiting maintenance (AWM) because these are the two most common reasons for a delay in resolving a discrepancy. Awaiting parts refers to a situation where the necessary parts or components to fix the discrepancy are not available, causing a delay in the maintenance process. Awaiting maintenance, on the other hand, indicates that the discrepancy requires further maintenance work or repairs before it can be resolved. Both of these scenarios can result in a delay in addressing the discrepancy and getting the system back to normal operation.

When an aircraft lands with a code 3 landing status, it means that the aircraft is not mission capable. Therefore, the maintenance status code entered in Integrated Maintenance Data System (IMDS) would be "Not mission capable (NMC)".

High repeat and recur rates refer to the frequency at which a particular issue or problem reoccurs. If there is a lack of thorough troubleshooting, it means that the root cause of the problem is not being identified and addressed effectively. This can lead to the problem persisting and recurring frequently. Therefore, the correct answer is thorough troubleshooting.

When baseline computer programs undergo changes, these changes are typically announced through a time compliance technical order (TCTO). The TCTO specifically addresses software-only modifications, indicating that only the software component of the computer program is being altered. This suggests that the hardware and contractor-specific aspects remain unchanged. Therefore, the correct answer is software-only.

When an aircraft is cancelled due to bad weather, it falls under the nonchargeable deviation category. This means that the cancellation is not counted as a fault or responsibility of the pilot or the aircraft operator. Instead, it is considered an external factor beyond their control, such as bad weather conditions. Therefore, the cancellation does not result in any charges or penalties for the pilot or the aircraft operator.

The fix rate is used to measure the speed of repair and equipment maintainability. This rate represents the efficiency at which repairs are made and equipment is returned to a fully functional state. A higher fix rate indicates a faster repair process and better maintainability of equipment.

The fix rate formula uses three time frames: 4, 8, or 12 hours.

Mean time between failure (MTBF) is a measure of the average time that a piece of equipment operates before experiencing a failure. It is commonly used to assess the reliability of equipment and predict its maintenance needs. In this context, MTBF provides the average equipment operating time before a failure occurs, making it the correct answer to the question. Fix rate, break rate, and man-hour per flying hour are not specifically related to the average operating time before failure.

On-equipment, operating command is the correct answer because it refers to maintenance actions that can be performed by the unit itself, using the skills and resources available within the unit. This means that the maintenance can be done without the need for external support or assistance from higher-level maintenance organizations such as Air Force Materiel Command (AFMC).

There are three authorized basic time compliance technical order (TCTO) categories.

Attrition represents a historical percentage of scheduled sorties lost to causes outside of unit control. This means that attrition refers to the loss of scheduled sorties due to factors beyond the control of the unit, such as equipment failure, weather conditions, or other unforeseen circumstances. This factor is important to consider when analyzing the efficiency and effectiveness of a unit's operations.

Using bullet statements instead of paragraphs is recommended when using text on a presentation slide. This guideline helps to make the information more concise and easily digestible for the audience. Bullet points allow for key points to be highlighted and presented in a clear and organized manner. This format helps to avoid overwhelming the audience with excessive text and allows them to focus on the main ideas being presented.

The action taken codes A, F, G, K, L, and Z are used to compute base repair capability rates. These codes likely represent different types of actions taken in the repair process, such as assessing the problem (A), performing repairs (F), conducting inspections (G), managing parts and materials (K), performing maintenance tasks (L), and other miscellaneous actions (Z). By using these specific codes, the base repair capability rates can be accurately calculated based on the different actions taken during the repair process.

The Accomplishment Utilization Report (AUR) provides information on the total number of cancellations. It is a comprehensive report that tracks and analyzes the utilization of resources and accomplishments within a specific period. This report would include data on flight cancellations, allowing for an accurate count of the total number of cancellations. The other options mentioned, such as the Daily Flying Schedule, Operational Event Report, and Monthly Maintenance Plan, may provide useful information but are not specifically focused on cancellations.

Base supply uses the rate of cannibalization to indicate depot support. Cannibalization refers to the practice of taking parts or equipment from one item to repair or support another item. When base supply indicates depot support through cannibalization, it means that parts or equipment are being taken from one depot to support another depot in need. This helps ensure that the necessary resources are available to maintain mission capability and support operations effectively.

Bar charts are used for comparing groups of data. Bar charts visually represent data using rectangular bars of varying lengths to represent different categories or groups. The height or length of each bar represents the quantity or value of the data being compared. By comparing the lengths of the bars, it becomes easy to identify and compare the values of different groups or categories. Therefore, bar charts are an effective tool for comparing groups of data.

The correct answer is Base. The question asks to identify which option is not a level of maintenance. Base maintenance is indeed a level of maintenance, involving the repair and maintenance of equipment at a centralized location. Depot, intermediate, and organizational maintenance are also levels of maintenance, each with their own specific roles and responsibilities in the maintenance and repair process.

The Integrated Maintenance Data System (IMDS) Users' Group meets monthly to keep current with IMDS issues. This suggests that the purpose of the group is to stay updated and informed about any relevant matters or concerns related to the IMDS. It implies that the group aims to stay knowledgeable about any developments, changes, or challenges regarding the IMDS system, which can help them address and resolve any issues that may arise effectively.

Off-equipment, operating command is the correct answer because it refers to those maintenance tasks that cannot be performed on the end item itself but can be done by the unit using their own skills and equipment. This means that the maintenance tasks are carried out by the unit outside of the equipment, rather than directly on the equipment itself. This category allows the unit to handle maintenance tasks that do not require specialized equipment or expertise from higher-level maintenance organizations.

Before calling for a meeting, it is important to evaluate the information at hand to determine if a meeting is the most effective way to address the issue. This involves considering factors such as the complexity of the issue, the number of people involved, the availability of resources, and the potential outcomes of a meeting. By evaluating this information, one can determine if a meeting is the best tool to address the issue or if alternative methods, such as email communication or individual discussions, would be more suitable.

The information associated with maintenance organization operations refers to data that is specific and relevant to the organization itself. This data is generated and used within the organization and is not readily available to external parties. Therefore, it can be classified as internal data.

The term "downtime" refers to the number of hours during which a communications-electronics (C-E) system cannot be used for a specified purpose. This term is commonly used in the context of system reliability and availability, indicating the period when the system is not operational or experiencing interruptions. It is a measure of the system's reliability and can be used to evaluate its performance and effectiveness.

If repair is not authorized at the base level, the item is forwarded to supply. Supply is responsible for managing and distributing resources, including repair and maintenance items. They would be the appropriate department to handle the forwarding of the item to contract maintenance or the AFMC depot for further repair and maintenance.

The first position of the work unit code (WUC) for general support work included in the computation for manhours per flying hour is 0.

The code used in the computation of the break rate is "Landing code 3." This suggests that the break rate is calculated based on the number of landings made.

The correct answer is b. arrives at the equipment. This means that the mean repair time (MRT) for communications-electronics (C-E) starts when the technician arrives at the equipment that needs to be repaired. This implies that the MRT does not include the time it takes for the technician to leave their workcenter or receive notification of a workorder. It also does not include the time it takes for the technician to complete troubleshooting. The MRT specifically focuses on the time it takes for the technician to start repairing the equipment once they have arrived at the location.

A repeat discrepancy occurs one sortie after a problem is originally reported. This means that after the initial report of a problem, the issue reoccurs or is noticed again during the very next sortie or flight.

The command that uses the departure reliability rate is the Air Mobility Command (AMC). This command is responsible for providing rapid global mobility and logistical support to the United States Air Force. The departure reliability rate is a measure of how often aircraft depart on time, and it is used by the AMC to assess the efficiency and effectiveness of their operations.

A histogram is a graphical representation of a frequency distribution. It is used to display the distribution of a continuous variable and is constructed by dividing the data into intervals called bins and then plotting the frequency of observations falling into each bin. A frequency polygon, on the other hand, is a line graph that displays the same information as a histogram but without the bars. Since both the histogram and frequency polygon represent the same data in different graphical formats, they can be used together to provide a more comprehensive understanding of the frequency distribution.

Symbolic shapes and arrows are commonly used in flowcharts to represent different steps or processes and the flow of information or actions between them. Flowcharts are visual representations that help in understanding complex processes or systems by breaking them down into simpler, sequential steps. This makes option a, flowchart, the most suitable answer as the other options do not typically involve the use of symbolic shapes and arrows in the same way.

The correct answer is twelve because the question is asking for the fix rate time interval reported for all aircraft other than fighters. This means that fighters have a different fix rate time interval, while all other aircraft have a fix rate time interval of twelve.

The objective of the inspection concept mentioned in the question is to minimize the length of time that an aircraft is out of commission due to a scheduled inspection. The term "phased" refers to a type of inspection that is conducted on a regular basis, usually at predetermined intervals, to ensure the continued airworthiness of the aircraft. This type of inspection is typically planned and scheduled in such a way that it can be completed within a shorter timeframe, minimizing the downtime of the aircraft.

All aircraft, regardless of the inspection concept being used, are required to have two calendar inspections.

Procuring activities are authorized to withhold the release of non-safety routine action TCTOs for a maximum of 90 days in order to allow for the simultaneous release of two or more time compliance technical orders (TCTO) requiring work in the same general area. This allows for efficient coordination and completion of the necessary work.

System reliability is the correct answer because it refers to the ability of a unit to keep equipment in a ready status. This indicator measures the effectiveness and efficiency of the system in terms of preventing failures, minimizing downtime, and ensuring that equipment is available and operational when needed. It reflects the unit's ability to maintain and sustain its equipment, ensuring that it is ready for use at all times.

The correct answer is c. Noncomparable data. When an analyst compares the late takeoff rate for two different locations, Tyndall AFB and Loring AFB, for the period October through February, they may be exhibiting the pitfall of noncomparable data. This is because the two locations are in different states, Florida and Maine, and may have different weather conditions, operational procedures, or other factors that could affect the late takeoff rate. Therefore, comparing the data from these two locations may not provide accurate or meaningful insights.

The correct answer is Total not mission capable supply (TNMCS). This mission capability status code reflects the total number of aircraft that are not mission capable due to supply issues. It includes both not mission capable supply (NMCS) and not mission capable both (NMCB) aircraft. Therefore, TNMCS accurately represents the total number of aircraft that have limitations on their mission capabilities due to supply problems.

The correct answer is air and ground abort. This means that the total abort rate includes both air aborts and ground aborts. Air abort refers to the situation where an aircraft aborts its takeoff or landing due to a problem or emergency in the air. Ground abort, on the other hand, refers to the situation where an aircraft aborts its takeoff before it becomes airborne due to a problem or emergency on the ground. By considering both air and ground aborts, the total abort rate provides a comprehensive measure of the number of aborted flights due to various reasons.

The correct answer is c. minutes. Minutes refer to the written record of a meeting, including the topics discussed, decisions made, and actions to be taken. People who missed the meeting can obtain a copy of the minutes to get a summary of what happened during the meeting. The minutes provide a concise overview of the meeting's key points, allowing individuals to stay informed and catch up on any important information or decisions that were made.

The 30 or 90 day inspection affects the Home station check. This inspection is conducted every 30 days for aircraft that fly less than 30 hours a month or every 90 days for aircraft that fly more than 30 hours a month. It includes a thorough inspection of the aircraft to ensure its airworthiness and to identify any maintenance or repair needs. This inspection is usually performed at the home station or base of operations.

The spare factor is determined by comparing the number of 1st sortie logistics losses to the number of historical sorties scheduled. This means that the spare factor is based on the number of logistical losses that occur during the first sortie, which is the first mission or flight of an aircraft. By comparing these losses to the number of historical sorties scheduled, the spare factor can be calculated to determine the level of spare aircraft or resources needed to account for these losses.

The Integrated Maintenance Data System (IMDS) downtime does not affect equipment downtime. IMDS is a system used for tracking and managing maintenance activities, but it does not directly impact the actual downtime of equipment. Manning level, experience level, and support equipment availability are factors that can affect equipment downtime as they relate to the availability of personnel and resources needed for maintenance and repair.

The most common approach to arrange maintenance data is in chronological order. This means organizing the data based on the time or date it was recorded or performed. This allows for easy tracking and reference of maintenance activities, as it follows a logical sequence of events. By arranging the data in chronological order, it becomes easier to identify patterns, track progress, and analyze historical maintenance records.

The correct answer is "Total deviations." When computing the Flying Scheduling Effectiveness rate, the total number of scheduled sorties is subtracted by the total deviations. This means that any deviations from the scheduled sorties, whether they are chargeable or nonchargeable, are taken into account when calculating the effectiveness rate. The number of cancelled takeoffs, total chargeable deviations, and total nonchargeable deviations are not subtracted from the total number of scheduled sorties.

The correct answer is "Both scheduled and unscheduled." When computing for the mean time between maintenance actions (MTBMA), both scheduled and unscheduled maintenance events are included. Scheduled maintenance refers to planned maintenance activities that are performed on a regular basis, such as routine inspections or preventive maintenance. Unscheduled maintenance, on the other hand, refers to unexpected or unplanned maintenance actions that are performed due to equipment failure or breakdown. By considering both types of maintenance events, the MTBMA provides a comprehensive measure of the average time between any maintenance actions, whether planned or unplanned.

By consolidating feasible cannibalizations to a few aircraft when practical, maintenance can keep the Total not mission capable supply (TNMCS) rate low. This means that by taking parts from a few aircraft to repair others, the supply of spare parts is effectively managed, reducing the number of aircraft that are unable to perform their missions due to lack of necessary supplies. Therefore, the TNMCS rate is kept low.