Aircraft Production, Maintenance, and Control PDF

TOPIC 1 : AIRCRAFT PRODUCTION (APPLIED BY LEADING AIRCRAFT MANUFACTURERS PER COMPLIANCE WITH EXISTING REGULATIONS OF ICAO, FAA, EASA, ETC.) AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  The Aircraft Production Process: 1. Conceptual...

TOPIC 1 : AIRCRAFT PRODUCTION (APPLIED BY LEADING AIRCRAFT MANUFACTURERS PER COMPLIANCE WITH EXISTING REGULATIONS OF ICAO, FAA, EASA, ETC.) AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  The Aircraft Production Process: 1. Conceptual Design and feasibility 2. Detailed design and Engineering 3. Manufacturing and Assembly AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL 1. Conceptual Design and feasibility Market Research and Requirements Gathering: Manufacturers begin by identifying market needs, such as demand for a new type of aircraft based on range, capacity, and fuel efficiency. Initial design specifications are developed based on customer input, airline requirements, and regulatory constraints. Preliminary Design: In this phase, engineers create basic aircraft configurations and assess feasibility in terms of aerodynamics, weight, materials, and performance. Computer-Aided Design (CAD) tools are used to create detailed models, and simulations are run to predict performance under various conditions. Preliminary designs must consider compliance with ICAO, FAA, and EASA standards from the outset to avoid costly redesigns later. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL 2. Detailed design and Engineering System Integration: Engineers focus on integrating various systems (e.g., avionics, propulsion, hydraulics, electrical) into the aircraft design. The design process must ensure that all systems work harmoniously and meet regulatory safety and performance standards. Material Selection: Aircraft manufacturers increasingly use advanced materials, such as carbon fiber composites, to reduce weight and improve fuel efficiency. Material selection must comply with FAA and EASA regulations concerning strength, durability, and fire resistance. Prototype Development: A full-scale prototype is built, which includes all major components and systems. The prototype undergoes rigorous ground testing, including static tests (e.g., stress testing the airframe) and dynamic tests (e.g., simulating flight conditions). AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  3. Manufacturing and Assembly: Component Manufacturing: Components are produced either in-house or by a global network of suppliers. These include everything from fuselage sections to avionics and landing gear. Each component must meet stringent quality standards and pass inspections before being sent to the final assembly line. Final Assembly Line (FAL): The FAL is the stage where all components are assembled into a complete aircraft. Leading manufacturers like Boeing and Airbus operate highly automated and efficient assembly lines. Quality control checks are integrated into every step of the assembly process. For example, precision laser measurements ensure that all parts fit together perfectly. Compliance with ICAO, FAA, and EASA regulations is continuously monitored, and any deviations are addressed immediately. Testing and Certification: Once assembled, the aircraft undergoes extensive testing, including flight tests where the aircraft’s performance is evaluated under real-world conditions. Manufacturers work closely with regulatory authorities to ensure that all testing meets the required standards for type certification. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Regulatory Compliance and Certification AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  International Civil Aviation Organization (ICAO): Role of ICAO: ICAO sets global standards for aviation safety, security, and environmental protection, which member states are expected to implement. Annexes to the ICAO Convention cover a wide range of areas, including airworthiness, operations, and maintenance. Impact on Aircraft Production: ICAO’s standards influence the entire production process, from design and materials to systems integration and testing. Manufacturers must ensure that their aircraft meet or exceed ICAO’s safety and performance standards, which are harmonized with those of national regulatory bodies like the FAA and EASA. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  Federal Aviation Administration (FAA): Type Certification: The FAA’s type certification process involves an exhaustive review of the aircraft’s design, construction, and testing. This includes compliance with Federal Aviation Regulations (FAR) related to safety, noise, and emissions. The certification process also involves flight tests, where FAA inspectors verify that the aircraft performs as expected under various conditions. Production Certification: To obtain a production certificate, manufacturers must demonstrate that they have the processes and quality controls in place to produce aircraft that conform to the type design. Regular audits and inspections by FAA representatives ensure ongoing compliance. Supplemental Type Certificates (STC): STCs are issued for modifications to an existing aircraft design, such as new engines, avionics, or structural changes. Manufacturers must prove that these modifications meet all applicable regulations AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL European Union Aviation Safety Agency (EASA): Type Certification and Design Organization Approval (DOA): EASA’s certification process is similar to the FAA’s but tailored to the European regulatory environment. Manufacturers in Europe must also obtain Design Organization Approval (DOA), which certifies that the organization’s design processes meet EASA standards. Environmental Compliance: EASA sets strict environmental standards for noise and emissions, in line with ICAO’s recommendations. Manufacturers must design aircraft that minimize environmental impact while maintaining performance. Ongoing Surveillance: EASA conducts regular audits and inspections to ensure that manufacturers continue to comply with safety and environmental regulations. Any non-compliance can result in fines, production delays, or revocation of certification. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Integration of Emerging Technologies and Trends AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Advanced Materials and Manufacturing Techniques: Composite Materials: The use of composite materials, such as carbon fiber, allows manufacturers to produce lighter, stronger, and more fuel-efficient aircraft. Regulatory bodies like the FAA and EASA have developed specific guidelines for the use of composites, requiring manufacturers to demonstrate their durability and performance under various conditions. Additive Manufacturing (3D Printing): 3D printing is increasingly used to produce complex parts with reduced weight and material waste. Certification of 3D-printed components requires rigorous testing to ensure they meet the same safety and performance standards as traditionally manufactured parts. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Digital Transformation in Production: Digital Twins and Simulation: Digital twins are virtual models of the aircraft that allow manufacturers to simulate and analyze performance in real-time, leading to more efficient design and testing processes. Regulatory bodies are beginning to recognize digital twins as a valid tool for demonstrating compliance with certain regulations. Automation and Robotics: Automation in manufacturing, including the use of robotics, enhances precision and reduces the risk of human error. Manufacturers must ensure that automated processes are reliable and meet all regulatory standards. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Environmental Sustainability: Regulatory Push for Green Aviation: ICAO, FAA, and EASA are pushing for the aviation industry to reduce its environmental impact through new technologies and more efficient designs. Aircraft manufacturers are developing next-generation engines, alternative fuels, and aerodynamic improvements to meet stricter emissions and noise regulations. Life-Cycle Assessment (LCA): Manufacturers are increasingly conducting LCAs to assess the environmental impact of an aircraft from production to disposal. Compliance with environmental regulations now extends beyond the aircraft’s operational life to include considerations of recyclability and waste management. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  TOPIC 2 : MAINTENANCE PLANNING DOCUMENT (MPD) AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL The Maintenance Planning Document (MPD) is a critical document created by aircraft manufacturers that outlines the recommended maintenance tasks and intervals for a particular aircraft type. The MPD serves as a guide for operators (airlines, charter services, etc.) to ensure that their aircraft remain airworthy, reliable, and safe throughout their operational life. It is a living document, continuously updated based on in-service experience, regulatory changes, and technological advancements. The MPD is a cornerstone of aircraft maintenance, providing a structured and detailed approach to ensuring the continued airworthiness of an aircraft. It reflects the manufacturer’s expertise in the design and production of the aircraft, as well as their understanding of how the aircraft will perform in service. By following the MPD, operators can maintain their aircraft in a safe, reliable, and efficient manner, ensuring compliance with regulatory requirements and minimizing the risk of in-service failures. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL To understand its role and significance, it's essential to recognize how it connects with other key documents and processes such as the Maintenance Review Board (MRB) report, Certification Maintenance Requirements (CMR), and Airworthiness Limitations (AL). These elements work together to ensure that aircraft are maintained to the highest standards of safety and airworthiness throughout their operational lives. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL MAINTENANCE REVIEW BOARD CERTIFICATION MAINTENANCE AIRWORTHINESS LIMITATIONS (MRB) REQUIREMENTS (CMR) (AL) Description: Description: Description: The MRB is a group of experts from the aircraft CMRs are specific maintenance tasks that are Airworthiness Limitations (AL) are specific manufacturer, regulatory authorities, and mandated as part of the aircraft type instructions and intervals that are required to operators who collaborate to develop a certification process. These tasks are required maintain the structural integrity and safety of comprehensive maintenance program for a to maintain compliance with the certification the aircraft. These limitations are established new aircraft type. The MRB process is guided standards established by aviation authorities by the manufacturer and approved by by the Maintenance Steering Group (MSG) like the FAA or EASA. regulatory authorities as part of the aircraft’s logic, which is a methodology for determining type certificate. maintenance needs based on reliability and Connection to MPD: safety. The CMR tasks are integrated into the MPD to Connection to MPD: Connection to MPD: ensure that operators include these mandatory maintenance activities in their AL tasks are incorporated into the MPD to The MPD is essentially a more detailed and overall maintenance program. The MPD not ensure that they are an integral part of the operator-friendly version of the MRB report. It only lists these tasks but also provides the operator’s maintenance program. The MPD takes the recommendations from the MRB and necessary procedures and intervals for their highlights these tasks as mandatory, translates them into a practical, usable completion. emphasizing their importance in maintaining document for airlines and other operators. The the airworthiness of the aircraft. MPD may also be updated based on in-service experience, while the MRB report serves as a baseline. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL KEY COMPONENTS OF MPD AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Maintenance Tasks: The MPD lists all the maintenance tasks that need to be performed on the aircraft. These tasks cover every part of the aircraft, including the airframe, engines, landing gear, avionics, and other systems. Types of Maintenance Tasks: Routine Inspections System Checks Overhaul Tasks Lubrication and Servicing Corrosion Prevention and Control Program (CPCP) AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Routine Inspections Visual Inspections: These are detailed visual checks performed on various parts of the aircraft, such as the fuselage, wings, landing gear, and control surfaces. They aim to detect signs of wear, damage, or corrosion that might not be apparent during normal operations. Functional Inspections: These involve testing the functionality of various aircraft systems to ensure they are operating within the required parameters. For example, functional checks might include testing the operation of the flight control systems, landing gear retraction and extension, and the performance of the environmental control systems. Operational Checks: These are real-time operational assessments of systems and components while the aircraft is powered up and in operation, either on the ground or during flight. Examples include checking the aircraft’s engines during idle and full power, or testing the autopilot system. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL System Checks: Electrical and Avionics Systems: These checks ensure that all electrical and avionics systems are functioning correctly. This can include testing the aircraft’s navigation systems, communication radios, and onboard computer systems. Hydraulic Systems: Involves checking the hydraulic systems that power the aircraft’s landing gear, flight controls, and braking systems. This includes ensuring there are no leaks, the fluid levels are correct, and that the system pressures are within normal operating ranges. Pneumatic and Environmental Control Systems: These checks focus on the aircraft’s systems responsible for pressurization, heating, cooling, and overall environmental control. Testing these systems ensures that the aircraft can maintain the correct cabin pressure and temperature at all altitudes. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Overhaul Tasks: Engine Overhauls: Engines are periodically removed from the aircraft for comprehensive overhauls, which involve disassembling the engine, inspecting each component, and replacing any worn or damaged parts. This ensures that the engines remain reliable and efficient. Landing Gear Overhauls: The landing gear is critical for the safety of takeoffs and landings. Overhaul tasks involve the complete disassembly of the landing gear, inspection for wear and tear, replacement of worn components, and reassembly. Airframe Overhauls: This includes major structural inspections and repairs, often referred to as “heavy maintenance.” The airframe overhaul might involve stripping the aircraft to its basic structure to inspect for fatigue, corrosion, or other issues. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Lubrication and Servicing: Scheduled Lubrication: Regular lubrication of moving parts, such as hinges, actuators, and gear mechanisms, is essential to prevent wear and corrosion. The MPD specifies the intervals at which lubrication should be performed and the type of lubricants to be used. Fluid Servicing: This involves checking and replenishing all necessary fluids, such as hydraulic fluid, engine oil, brake fluid, and coolant. Regular fluid servicing ensures that all systems operate smoothly and reduces the risk of system failures. Corrosion Prevention and Control Program (CPCP): Inspection for Corrosion: The CPCP tasks involve regular inspections of areas prone to corrosion, such as the aircraft’s fuselage, wings, and landing gear. These inspections help identify corrosion early before it can cause significant damage. Corrosion Treatment and Prevention: If corrosion is found, the MPD outlines procedures for treating the affected areas, including removing the corrosion, applying protective coatings, and implementing measures to prevent future occurrences. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Intervals and Scheduling: The MPD specifies the intervals at which each maintenance task should be performed. These intervals are based on various factors, including: Flight Hours: The number of hours an aircraft has flown. Flight Cycles: The number of takeoffs and landings an aircraft has completed. Calendar Time: The passage of time, such as days, months, or years. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Maintenance Check Categories: A-Check: Performed approximately every 400-600 flight hours or every few months, the A-Check is a light maintenance check that includes a general inspection of the aircraft, lubrication of moving parts, and operational checks of critical systems. B-Check: Performed every 6-8 months, the B-Check is slightly more comprehensive than the A-Check and includes deeper inspections of systems and components, as well as additional functional and operational checks. C-Check: Conducted every 18-24 months or after a certain number of flight cycles, the C-Check is a detailed inspection that involves disassembly and in-depth inspections of various systems. This check is performed in a hangar and can take several days to complete. D-Check: The D-Check, also known as a “heavy maintenance visit” (HMV), is the most comprehensive and is typically performed every 6-10 years. It involves a complete teardown of the aircraft, including inspection and refurbishment of the airframe, engines, and all major systems. The D-Check can take several weeks and is the most labor-intensive and expensive of all maintenance checks. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Interval Determination: Flight Hours: Maintenance tasks are often scheduled based on the number of hours the aircraft has been in operation. For example, an engine oil change might be required every 500 flight hours. Flight Cycles: A flight cycle refers to one takeoff and landing. Tasks such as landing gear inspections might be scheduled based on the number of flight cycles, as repeated takeoffs and landings exert stress on certain components. Calendar Time: Some maintenance tasks are scheduled based on calendar time, regardless of how many hours the aircraft has flown or how many cycles it has completed. For example, certain corrosion inspections might be required every 12 months. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Customizing the MPD for Operators: While the MPD provides a general guideline, operators can customize the document to better suit their specific operational needs. This process, known as tailoring, allows operators to adjust the maintenance program based on their unique operational environment, fleet usage, and regulatory requirements. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Tailoring the Maintenance Program: Operational Needs: Operators, such as airlines, tailor the MPD to fit their specific operational environment. For instance, an airline operating in a harsh, cold environment might require more frequent inspections and lubrication of components susceptible to cold weather effects. Fleet Utilization: Operators may adjust maintenance intervals based on how intensively their fleet is used. For high-utilization fleets, operators might combine tasks to minimize downtime and maintain operational efficiency. Regulatory Requirements: While the MPD provides a baseline, operators must ensure that their customized maintenance program complies with the specific regulatory requirements of their operating region. This might involve adding additional tasks or adjusting intervals to meet local regulations. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Integration with Other Documentation: Maintenance Procedures Manual (MPM): The MPM outlines the detailed procedures for carrying out the tasks listed in the MPD, tailored to the operator’s specific needs and practices. Maintenance Control Manual (MCM): This manual describes the operator’s policies, procedures, and responsibilities for maintaining the aircraft in accordance with the MPD and other regulatory requirements. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Regulatory Compliance: The MPD must comply with the regulatory requirements of aviation authorities such as the Federal Aviation Administration (FAA) in the United States, the European Union Aviation Safety Agency (EASA) in Europe, or other national aviation authorities (NAAs). AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Tailoring the Maintenance Program: Operational Needs: Operators, such as airlines, tailor the MPD to fit their specific operational environment. For instance, an airline operating in a harsh, cold environment might require more frequent inspections and lubrication of components susceptible to cold weather effects. Fleet Utilization: Operators may adjust maintenance intervals based on how intensively their fleet is used. For high-utilization fleets, operators might combine tasks to minimize downtime and maintain operational efficiency. Regulatory Requirements: While the MPD provides a baseline, operators must ensure that their customized maintenance program complies with the specific regulatory requirements of their operating region. This might involve adding additional tasks or adjusting intervals to meet local regulations. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Integration with Other Documentation: Maintenance Procedures Manual (MPM): The MPM outlines the detailed procedures for carrying out the tasks listed in the MPD, tailored to the operator’s specific needs and practices. Maintenance Control Manual (MCM): This manual describes the operator’s policies, procedures, and responsibilities for maintaining the aircraft in accordance with the MPD and other regulatory requirements. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Updates and Revisions: The MPD is a dynamic document that evolves over time. It is updated based on data collected from the operation of the aircraft, including in-service experience, findings from inspections, incidents, and technological developments. These updates are communicated to operators through service bulletins and other documentation, ensuring that maintenance programs remain current and effective. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL In-Service Experience: Data Collection: The MPD is continuously updated based on feedback from the field, including in-service data collected from operators worldwide. This data might include incident reports, reliability statistics, and findings from routine inspections. Incorporation of Lessons Learned: As new issues are identified and resolved, the MPD is revised to incorporate these lessons, ensuring that maintenance tasks and intervals reflect the latest knowledge and best practices. Technological Advancements: New Systems and Components: As new technologies are integrated into the aircraft, the MPD is updated to include maintenance tasks for these new systems and components. This might involve adding new inspection tasks or adjusting existing ones AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL Supporting Documents: Aircraft Maintenance Manual (AMM): Provides detailed instructions for performing each task listed in the MPD. Component Maintenance Manual (CMM): Contains maintenance procedures for specific components, typically used during overhauls or repairs. Structural Repair Manual (SRM): Provides guidelines for repairing structural damage, which may be identified during inspections outlined in the MPD. Wiring Diagram Manual (WDM): Essential for troubleshooting and repairing electrical systems, with tasks scheduled within the MPD. AENG-418 AIRCRAFT PRODUCTION, MAINTENANCE, PLANNING AND CONTROL  MAINTENANCE DOCUMENTATIONS  MAINTENANCE DOCUMENTATIONS TYPES OF DOCUMENTATION Controlled Documents The documentation for maintenance is Used for operation and/or maintenance of required by the FAA. Advisory Circular AC 120-16E, Air Carrier aircraft in accordance with FAA regulations. Maintenance Programs, refers to Have limited distribution within airlines and the air carrier maintenance manual require regular modifications and must system, maintenance record/documentation keeping include list of revisions, active, and revoked system, and various other page numbers in document. requirements. Manufacturer’s documentation Non-Controlled Documents Regulatory documentation Provided by the operators and manufacturers. Airline-generated documentation ATA document standard  MANUFACTURER’S DOCUMENTATION Maintenance AMM, FIM/TSM, CMM Engineering WDM, ASM, SRM, SB Planning MPD, IPC Operations MMEL, CDL, DDG  Aircraft Maintenance Manual MANUFACTURER’S DOCUMENTATION It contains basic information required to service, repair, replace, adjust, inspect, and check equipment and systems on the Maintenance aircraft. Aircraft Maintenance Manual (AMM) Description and operation of each Component Maintenance system Manual (CMM) Basic maintenance and servicing actions Component Location Manual (CLM) / System Description Functional and operational tests Section (SDS) Adjustments Fault Isolation Manual (FIM) / Trouble Shooting Manual Replenishing various fluids and other (TSM) servicing tasks  Component Maintenance Manual MANUFACTURER’S DOCUMENTATION It contains information required to check, repair, adjust, test and/or overhaul units or assemblies, normally performed away from the airplane Maintenance because of the need for special equipment. Aircraft Maintenance Manual (AMM) Component Maintenance System Description Manual (Boeing) / Manual (CMM) Component Location Manual (Airbus) Component Location Manual (CLM) / System Description Section (SDS) It contains information on component location, Fault Isolation Manual (FIM) / system operation, and Training Information Points Trouble Shooting Manual for all systems and equipment installed in the (TSM) aircraft.  MANUFACTURER’S Fault Isolation Manual (Boeing) / DOCUMENTATION Trouble Shooting Manual (Airbus) It contains information required to isolate and Maintenance correct faults in the systems and equipment Aircraft Maintenance Manual installed in the aircraft. (AMM) Component Maintenance Non-Destructive Testing Manual Manual (CMM) Component Location Manual (NTM / NDTM) (CLM) / System Description Section (SDS) Gives instructions with regard to specific Fault Isolation Manual (FIM) / nondestructive testing procedures for the Trouble Shooting Manual (TSM) aircraft.  Wiring Diagram Manual MANUFACTURER’S DOCUMENTATION For Boeing, it is a collection of diagrams, drawings, and lists that define the wiring of associated equipment installed on the aircraft. Engineering Wiring Diagram Manual (WDM) Aircraft Wiring List (AWL) For Airbus, WDM is divided into AWL, AWM and Aircraft Wiring Manual (AWM) ASM. Aircraft Schematic Manual (ASM) / System Schematic It gives a full understanding of the electrical, Manual (SSM) electronic and electro-mechanical system Structural Repair Manual installation and physical connections of the aircraft. (SRM)  Wiring Diagram Manual MANUFACTURER’S DOCUMENTATION Aircraft Wiring List – provides list of wires, connectors, terminals, strip locations, wire routings, and clamping diagrams. Engineering Wiring Diagram Manual Aircraft Wiring Manual – provides a physical (WDM) view of systems and subsystems. It reflects the Aircraft Wiring List (AWL) definition of the wiring installation. Aircraft Wiring Manual (AWM) Aircraft Schematic Manual (Airbus) / Aircraft Schematic Manual (ASM) / System Schematic System Schematic Manual (Boeing) – Manual (SSM) provides schematic diagrams and functional views Structural Repair Manual of electrical, electronic, and hydraulic systems and (SRM) other subsystems on the aircraft.  Structural Repair Manual MANUFACTURER’S DOCUMENTATION It contains general data and special instructions for the repair of airplane structures and structural components. Engineering Wiring Diagram Manual Provides information regarding the aircraft skin and (WDM) other specific tolerances and procedures in the Aircraft Wiring List (AWL) event of minor structural damage. Aircraft Wiring Manual (AWM) Contains simple repairs which are approved by the Aircraft Schematic Manual FAA and to be completed by the operator. Some (ASM) / System Schematic Manual (SSM) other structural repairs must be done by the airframe manufacturer or other FAA designated Structural Repair Manual (SRM) repair facilities.  Maintenance Planning Document MANUFACTURER’S List of maintenance and servicing tasks to be DOCUMENTATION performed on the aircraft. Contains all items of the MRB Report along with Maintenance / other information such as CMRs and ALs. Engineering / Planning Maintenance Planning Illustrated Parts Catalog Document (MPD) Illustrated Parts Catalog (IPC) Produced by manufacturers and describes in Service Bulletins (SB) comprehensive detail every component of the Service Letters (SL) aircraft, along with illustrations and their part numbers. Maintenance Tips (MT) Contains lists and location diagrams of all parts with their part numbers used in the aircraft.  Service Bulletins MANUFACTURER’S DOCUMENTATION SB is the document used by manufacturers of aircraft, engines or their components to communicate details of modifications, maintenance, Maintenance / or product improvement which can be embodied Engineering / Planning in aircraft. Maintenance Planning Document (MPD) It includes instructions for modifications, Illustrated Parts Catalog (IPC) substitution of parts, special inspections/checks Service Bulletins (SB) applicable on in-service aircraft. Service Letters (SL) Maintenance Tips (MT) Compliance may or may not be mandatory.  MANUFACTURER’S DOCUMENTATION Service Letters Usually provides information to improve Maintenance / maintenance actions without equipment Engineering / Planning modification. Maintenance Planning Document (MPD) Illustrated Parts Catalog (IPC) Maintenance Tips Service Bulletins (SB) A suggestion to maintenance personnel to assist in Service Letters (SL) their work or improve conditions. Maintenance Tips (MT)  MANUFACTURER’S DOCUMENTATION Master Minimum Equipment List Provided by the manufacturer and approved by the Operations authorities. Master Minimum Equipment List (MMEL) Identifies instruments, systems, or equipment which Configuration Deviation List may be inoperative at the commencement of a (CDL) flight. Dispatch Deviation Guide (DDG) May be associated with special operating conditions, limitations, or procedures.  MANUFACTURER’S Configuration Deviation List DOCUMENTATION Provided by the manufacturer and approved by the authorities. Operations A listing of regulator-approved non-structural Master Minimum Equipment List (MMEL) external parts that may be missing but the airplane remains airworthy. Configuration Deviation List (CDL) Dispatch Deviation Guide Dispatch Deviation Guide (DDG) Guide document intended to secure the aircraft and systems against inadvertent operation when some MMEL items are inoperative.