Download or read book Aging aircraft Fleet planning and maintenance written by Sebastian Wagner and published by GRIN Verlag. This book was released on 2014-05-12 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seminar paper from the year 2014 in the subject Engineering - Aerospace Technology, grade: 1,3, University of Applied Sciences Wildau (Wildau Institute of Technology), course: Aviation Management 2012, language: English, abstract: Indeed, the majority of airlines are faced with the challenge of aging fleets and when it might be optimal to replace older aircraft. Well, any discussion of the wisdom of retaining capital equipment is usually based on economic arguments. In a competitive environment, airlines are continuously obliged to improve their business and equipment to stay profitable. The prediction of future maintenance costs of the own fleet is an integral element of prospective budgeting projections; on the other hand they serve as a vital part within aircraft replacement calculations. For example if the costs of maintaining the existing equipment on a timely basis exceeds the capital, interest, and amortization charges on replacement equipment, the decision to buy a sort of replacement is straightforward. In most cases the substitute equipment even offers an improved productivity as well (Dixon 2006, p. 1). Beside any debate concerning costs and efficiency, flight safety considerations also enter into the discussion especially in the field of aviation. The question to repair or replace is an ongoing decision making process for the maintenance department of every airline operator. Now the key questions to be answered in this context are: Is it possible to describe a standard airplane service life and how does the fleet age of world’s leading airlines look like? How does the process of maintenance develop over an aircraft’s whole life cycle and can necessary costs be estimated? What can be done technically to keep aging effects of aircraft under control and when might be the right time to withdraw an aircraft from service? In order to answer the abundance of questions my term paper is divided into an economic based part including compiled data and statistics and a more technical part. In the beginning, this paper investigates the ordinary economic life of commercial airplanes. Additionally I’m going to inspect exemplary the average fleet age of world’s leading airlines. In the second stage I am going to describe how to estimate maintenance costs of aircraft that grow older. Further I wanted to clarify technical aspects and problems that might occur more frequently with the rising age of an aircraft.
Download or read book Aircraft Maintenance written by United States. General Accounting Office and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aging Aircraft Maintenance written by Kenneth M. Mead and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Oversight of the Maintenance and Repair of Aging Aircraft written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Aviation and published by . This book was released on 1992 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Challenges and Issues with the Further Aging of U S Air Force Aircraft written by J. R. Gebman and published by Rand Corporation. This book was released on 2009 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the next 20 years, the further aging of already-old aircraft will introduce challenges and issues for aircraft operators. The technical challenges relate to structures, propulsion, and systems. The institutional challenges include limitations on independent verification of fleet status and future condition and on information needed for engineering analyses including risk assessment, and an overall scarcity of resources.
Download or read book Sustaining an Aging Aircraft Fleet with Practical Life Enhancement Methods written by Len Reid and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extension of aircraft beyond their original design service life or operation in expanded or different roles pose challenges in continuing to operate these aircraft economically or safely. Management of the fleet generally entails increased structural inspection and maintenance, repair of inevitable fatigue damage or possible structural replacement. In a large number of cases structural elements become life limiting or require major rework due to fatigue cracks and damage originating at holes. Hole cold expansion to induce residual compressive stresses around the hole, and thereby minimize the stress concentration effect of the hole, is a proven method for retarding cracks at holes. Reworking existing structure using this technology can significantly extend the fatigue and damage tolerance life and ultimately reduce or eliminate the need for costly ongoing structural inspection while ensuring continued airworthiness without compromising performance or weapons systems capability. This paper discusses the hole cold expansion method as well as derivative technology used to repair fatigue cracked or corroded holes using high interference fit cold expanded bushings. Examples of where the technology is used to extend service lives and restore structural integrity on aging military and commercial aircraft will be presented.
Download or read book Aircraft Maintenance written by United States. General Accounting Office and published by . This book was released on 1991 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commander Naval Air Forces CNAF Aircraft Operations Maintenance AOM written by Kenny K. Chase and published by . This book was released on 2006 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Naval aviation serves as a vital component of many air and ground task organized forces vying for a share of the Department of Defense (DoD) budget. The decisions in the 1990s to reduce purchases of new equipment left the Navy with aging fleets of aircraft that are increasingly expensive to maintain. This situation coupled with the cost of the Global War on Terror has created a cycle in which more funds are spent maintaining older equipment at the expense of new purchases. This has lead to still older equipment and higher maintenance costs. The increases in the costs of operating and maintaining aging military equipment have created a budgetary crisis in the Department of Defense. The Commander Naval Air Forces (CNAF), Commander, Naval Air Force, U.S. Pacific Fleet (COMNAVAIRPAC), and Commander, Naval Air Force, U.S. Atlantic Fleet (COMNAVAIRLANT), face the great challenge of effectively vying for their share of the 37 percent of the DoD budget that pays for the day-to-day costs of Operation and Maintenance (O & M). Precisely identifying budgeting and costs for sustaining Aircraft Operations Maintenance (AOM) of the Navy's aging fleet of aircraft is vital to preserving an essential component of current war fighting doctrine. Unfortunately, establishing the association between age and costs is complex. Costs are likely to be affected by an aircraft's age, component technology, the number of flight hours, manner in which it is flown, and the resources devoted to maintenance. Therefore, to better identify costs and maintenance trends of value to Naval aviation, the cost drivers for AOM should be investigated. The purpose of this study is to analyze the effectiveness of the aircraft maintenance process in conjunction with actions to remove impediments to non-deployed aviation readiness. The methodology for the study will involve an analysis of specific changes in training personnel, equipping depots, executing programs, and utilizing infrastructure, along with a review of the end results of these changes.
Download or read book Aging of U S Air Force Aircraft written by National Research Council and published by National Academies Press. This book was released on 1997-09-30 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the aircraft that form the backbone of the U.S. Air Force operational fleet are 25 years old or older. A few of these will be replaced with new aircraft, but many are expected to remain in service an additional 25 years or more. This book provides a strategy to address the technical needs and priorities associated with the Air Force's aging airframe structures. It includes a detailed summary of the structural status of the aging force, identification of key technical issues, recommendations for near-term engineering and management actions, and prioritized near-term and long-term research recommendations.
Download or read book Aging Aircraft written by Raymond Pyles and published by Rand Corporation. This book was released on 2003 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: To help improve the Air Force's ability to foresee the implications for safety, aircraft availability, and cost of its plans to retain aircraft fleets for service lives that may be as long as 80 years, and to identify actions that will mitigate or avoid some of the more severe consequences, this study measures how the USAF aircraft fleets' ages relate to maintenance and modification workloads and material consumption.
Download or read book New Materials for Next Generation Commercial Transports written by Committee on New Materials for Advanced Civil Aircraft and published by National Academies Press. This book was released on 1996-03-29 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this book was to identify issues related to the introduction of new materials and the effects that advanced materials will have on the durability and technical risk of future civil aircraft throughout their service life. The committee investigated the new materials and structural concepts that are likely to be incorporated into next generation commercial aircraft and the factors influencing application decisions. Based on these predictions, the committee attempted to identify the design, characterization, monitoring, and maintenance issues that are critical for the introduction of advanced materials and structural concepts into future aircraft.
Download or read book Commander Naval Air Forces CNAF Aircraft Operations Maintenance AOM An Examination of Effectiveness in Maintaining and Operating an Aging Aircraft Fleet written by and published by . This book was released on 2006 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Naval aviation serves as a vital component of many air and ground task organized forces vying for a share of the Department of Defense (DoD) budget. The decisions in the 1990s to reduce purchases of new equipment left the Navy with aging fleets of aircraft that are increasingly expensive to maintain. This situation coupled with the cost of the Global War on Terror has created a cycle in which more funds are spent maintaining older equipment at the expense of new purchases. This has lead to still older equipment and higher maintenance costs. The increases in the costs of operating and maintaining aging military equipment have created a budgetary crisis in the Department of Defense. The Commander Naval Air Forces (CNAF), Commander, Naval Air Force, U.S. Pacific Fleet (COMNAVAIRPAC), and Commander, Naval Air Force, U.S. Atlantic Fleet (COMNAVAIRLANT), face the great challenge of effectively vying for their share of the 37 percent of the DoD budget that pays for the day-to-day costs of Operation and Maintenance (O & M). Precisely identifying budgeting and costs for sustaining Aircraft Operations Maintenance (AOM) of the Navy's aging fleet of aircraft is vital to preserving an essential component of current war fighting doctrine. Unfortunately, establishing the association between age and costs is complex. Costs are likely to be affected by an aircraft's age, component technology, the number of flight hours, manner in which it is flown, and the resources devoted to maintenance. Therefore, to better identify costs and maintenance trends of value to Naval aviation, the cost drivers for AOM should be investigated. The purpose of this study is to analyze the effectiveness of the aircraft maintenance process in conjunction with actions to remove impediments to non-deployed aviation readiness.
Download or read book Meeting the Aging Aircraft Challenge written by U S Government Accountability Office (G and published by BiblioGov. This book was released on 2013-06 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: GAO reviewed issues regarding aging aircraft, focusing on: (1) the status of Federal Aviation Administration (FAA) and aviation industry actions to respond to the problem of aging aircraft; and (2) FAA opportunities to more actively deal with emerging aircraft maintenance problems. GAO found that FAA and the aviation industry have taken many actions in response to the recommendations of a 1988 international conference on aging aircraft, but FAA should develop a unified plan to enhance coordination and oversight and should report periodically to Congress on the progress toward accomplishing the plan's goals. GAO also found that FAA could enhance air safety by: (1) achieving more hands-on aircraft inspection to supplement its paperwork review of maintenance records; (2) effectively utilizing its service difficulty reporting database to develop airworthiness directives, identify industry repair trends, and allocate inspection resources; and (3) dealing with the emerging problem of capacity shortage in the aircraft repair industry.
Download or read book Investigating Optimal Replacement of Aging Air Force Systems written by Edward Geoffrey Keating and published by Minnesota Historical Society. This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a continuing project on aging aircraft and the replacement-or-repair decision, the authors develop a parsimonious model of the decision and apply it to the U.S. Air Force's C-21A transport and KC-135 tanker aircraft. They find that, for the C-21A, it probably would be appropriate to undertake a 20,000 flight hour system and component replacement schedule-prescribed renovation in the 2012 timeframe, but the aircraft should be retired around 2020. For the KC-135 tanker, it would be optimal to replace the KC-135 before the end of the decade
Download or read book Aging Commercial Airline Fleet written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation and published by . This book was released on 1986 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Condition Based Maintenance in Aviation written by Ravi Rajamani and published by SAE International. This book was released on 2018-12-11 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Condition-Based Maintenance in Aviation: The History, The Business and The Technology describes the history and practice of Condition-Based Maintenance (CBM) systems by showcasing ten technical papers from the archives of SAE International, stretching from the dawn of the jet age down to the present times. By scientifically understanding how different components degrade during operations, it is possible to schedule inspections, repairs, and overhauls at appropriate intervals so that any incipient failure can be detected well in advance. Today, this includes more sensors and analytics so that periodic inspections are replaced by automated "continuous" inspections, and analytical methods that detect imminent failures and predict degradation issues more economically and efficiently. Similar concepts are also being developed for delivering prognostics functions, such as tracking of remaining useful life (RUL) of life-limited parts in aircraft engines. The discipline within CBM that deals with this is called prognostics and health management (PHM), which covers all aspects of diagnostics and prognostics, including modeling of systems and subsystems, sensing, data transmission, storage and retrieval, analytical methods, and decision making. Traditionally, nondestructive testing (NDT) methods have been employed during the major airplane checks to assess structural damage. These techniques are enhanced with in- situ sensing techniques that can continuously monitor aircraft structures and report on their health. The move to condition-based assessment of maintenance needs to be balanced by the assurance that safety is not compromised, that initial cost of new equipment is amortized by the savings, and that regulatory authorities are on board with any modifications to the planned maintenance schedule. The trend is clearly to include more CBM functions into Maintenance, Repair and Overhaul (MRO) processes so better cost control can be achieved without ever comprising passenger safety.
Download or read book The Maintenance Costs of Aging Aircraft written by Matthew C. Dixon and published by Rand Corporation. This book was released on 2006 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Air Force is grappling with the challenge of aging fleets and the optimal time to replace them. This monograph examines commercial aviation data to draw inferences about aging aircraft that may be relevant to the Air Force. It focuses on "aging effects"-i.e., how aircraft maintenance costs change as aircraft grow older. Although commercial aircraft clearly differ from military aircraft, the aging-effect estimates might help the Air Force to project changing maintenance costs over time.
