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24-471: The Ogden Air Logistics Complex ( OO-ALC ) performs programmed depot maintenance on a number of US Air Force weapon systems . Specifically it supports A-10 Thunderbolt II , B-2 Spirit , F-16 Fighting Falcon , and LGM-30G Minuteman III systems. Additionally, the center is responsible for landing gear systems, conventional munitions, solid propellants, and composite materials. It is located at Hill Air Force Base . The former Ogden Air Logistics Center

48-467: A condition in which it can perform its intended function (NF EN 13306 X 60-319 standard, June 2010). Corrective maintenance can be subdivided into "immediate corrective maintenance" (in which work starts immediately after a failure) and "deferred corrective maintenance" (in which work is delayed in conformance to a given set of maintenance rules). Sometimes, particularly in French-speaking countries,

72-509: A distinction is made between curative maintenance and regular corrective maintenance. While the former is a larger scale procedure to permanently solve the problem (e.g. by replacing the defective mechanism), the latter only fixes the acute issue (e.g. only repairing or replacing an individual component) and might be a more temporary solution. The technical standards concerning corrective maintenance are set by IEC 60050 chapter 191 °Dependability and quality of service" The NF EN 13306 X 60-319

96-403: A predicted/fixed shelf life schedule. These items are given to tax-exempt institutions. Condition-based maintenance ( CBM ), shortly described, is maintenance when need arises . Albeit chronologically much older, It is considered one section or practice inside the broader and newer predictive maintenance field, where new AI technologies and connectivity abilities are put to action and where

120-400: Is a maintenance task performed to identify, isolate, and rectify a fault so that the failed equipment, machine, or system can be restored to an operational condition within the tolerances or limits established for in-service operations. A French official standard defines "corrective maintenance" as maintenance which is carried out after failure detection and is aimed at restoring an asset to

144-435: Is a subset of IEC 60050-191 . The decision to choose corrective maintenance as a method of maintenance is a decision depending on several factors as the cost of downtime, reliability characteristics and redundancy of assets. The steps of corrective maintenance are, following failure, diagnosis – elimination of the part, causing the failure – ordering the replacement – replacement of the part – test of function and finally

168-405: Is also used for maintenance, repair and operations . Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions: Maintenance is strictly connected to the utilization stage of the product or technical system, in which the concept of maintainability must be included. In this scenario, maintainability

192-487: Is any variety of scheduled maintenance to an object or item of equipment. Specifically, planned maintenance is a scheduled service visit carried out by a competent and suitable agent, to ensure that an item of equipment is operating correctly and to therefore avoid any unscheduled breakdown and downtime. The key factor as to when and why this work is being done is timing, and involves a service, resource or facility being unavailable. By contrast, condition-based maintenance

216-477: Is considered as the ability of an item, under stated conditions of use, to be retained in or restored to a state in which it can perform its required functions, using prescribed procedures and resources. In some domains like aircraft maintenance , terms maintenance, repair and overhaul also include inspection, rebuilding, alteration and the supply of spare parts, accessories, raw materials, adhesives, sealants, coatings and consumables for aircraft maintenance at

240-641: Is not directly based on equipment age. Planned maintenance is preplanned, and can be date-based, based on equipment running hours, or on distance travelled. Parts that have scheduled maintenance at fixed intervals, usually due to wearout or a fixed shelf life , are sometimes known as time-change interval, or TCI items. Predictive maintenance techniques are designed to help determine the condition of in-service equipment in order to estimate when maintenance should be performed. This approach promises cost savings over routine or time-based preventive maintenance , because tasks are performed only when warranted. Thus, it

264-532: Is not lubricated on schedule" that functions "until a bearing burns out." Preventive maintenance contracts are generally a fixed cost, whereas improper maintenance introduces a variable cost: replacement of major equipment. Main objective of PM are: Preventive maintenance or preventative maintenance ( PM ) has the following meanings: Other terms and abbreviations related to PM are: Planned preventive maintenance (PPM), more commonly referred to as simply planned maintenance ( PM ) or scheduled maintenance ,

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288-423: Is not trivial to turn this measured data into actionable knowledge about the health of the equipment. As systems get more costly, and instrumentation and information systems tend to become cheaper and more reliable, CBM becomes an important tool for running a plant or factory in an optimal manner. Better operations will lead to lower production cost and lower use of resources. And lower use of resources may be one of

312-884: Is not used for less important parts of machinery despite obvious advantages. However it can be found everywhere where increased safety is required, and in future will be applied even more widely. Corrective maintenance is a type of maintenance used for equipment after equipment break down or malfunction is often most expensive – not only can worn equipment damage other parts and cause multiple damage, but consequential repair and replacement costs and loss of revenues due to down time during overhaul can be significant. Rebuilding and resurfacing of equipment and infrastructure damaged by erosion and corrosion as part of corrective or preventive maintenance programmes involves conventional processes such as welding and metal flame spraying, as well as engineered solutions with thermoset polymeric materials. Corrective maintenance Corrective maintenance

336-456: Is regarded as condition-based maintenance carried out as suggested by estimations of the degradation state of an item. The main promise of predictive maintenance is to allow convenient scheduling of corrective maintenance , and to prevent unexpected equipment failures. This maintenance strategy uses sensors to monitor key parameters within a machine or system, and uses this data in conjunction with analysed historical trends to continuously evaluate

360-557: Is that the first generation of CBM in the oil and gas industry has only focused on vibration in heavy rotating equipment. Secondly, introducing CBM will invoke a major change in how maintenance is performed, and potentially to the whole maintenance organization in a company. Organizational changes are in general difficult. Also, the technical side of it is not always as simple. Even if some types of equipment can easily be observed by measuring simple values such as vibration (displacement, velocity or acceleration), temperature or pressure, it

384-853: The utilization stage. In international civil aviation maintenance means: This definition covers all activities for which aviation regulations require issuance of a maintenance release document (aircraft certificate of return to service – CRS). The marine and air transportation, offshore structures, industrial plant and facility management industries depend on maintenance, repair and overhaul (MRO) including scheduled or preventive paint maintenance programmes to maintain and restore coatings applied to steel in environments subject to attack from erosion, corrosion and environmental pollution. The basic types of maintenance falling under MRO include: Architectural conservation employs MRO to preserve, rehabilitate, restore, or reconstruct historical structures with stone, brick, glass, metal, and wood which match

408-497: The acronym CBM is more often used to describe 'condition Based Monitoring' rather than the maintenance itself. CBM maintenance is performed after one or more indicators show that equipment is going to fail or that equipment performance is deteriorating. This concept is applicable to mission-critical systems that incorporate active redundancy and fault reporting . It is also applicable to non-mission critical systems that lack redundancy and fault reporting. Condition-based maintenance

432-399: The initial cost of CBM can be high. It requires improved instrumentation of the equipment. Often the cost of sufficient instruments can be quite large, especially on equipment that is already installed. Wireless systems have reduced the initial cost. Therefore, it is important for the installer to decide the importance of the investment before adding CBM to all equipment. A result of this cost

456-440: The maintenance personnel of today is more than ever able to decide what is the right time to perform maintenance on some piece of equipment. Ideally, condition-based maintenance will allow the maintenance personnel to do only the right things, minimizing spare parts cost, system downtime and time spent on maintenance. Despite its usefulness of equipment, there are several challenges to the use of CBM. First and most important of all,

480-690: The most important differentiators in a future where environmental issues become more important by the day. Another scenario where value can be created is by monitoring the health of a car motor. Rather than changing parts at predefined intervals, the car itself can tell you when something needs to be changed based on cheap and simple instrumentation. It is Department of Defense policy that condition-based maintenance (CBM) be "implemented to improve maintenance agility and responsiveness, increase operational availability, and reduce life cycle total ownership costs". CBM has some advantages over planned maintenance: Its disadvantages are: Today, due to its costs, CBM

504-1033: The original constituent materials where possible, or with suitable polymer technologies when not. Preventive maintenance ( PM ) is "a routine for periodically inspecting" with the goal of "noticing small problems and fixing them before major ones develop." Ideally, "nothing breaks down." The main goal behind PM is for the equipment to make it from one planned service to the next planned service without any failures caused by fatigue, extreme fluctuation in temperature(such as heat waves ) during seasonal changes, neglect, or normal wear (preventable items), which Planned Maintenance and Condition Based Maintenance help to achieve by replacing worn components before they actually fail. Maintenance activities include partial or complete overhauls at specified periods, oil changes, lubrication, minor adjustments, and so on. In addition, workers can record equipment deterioration so they know to replace or repair worn parts before they cause system failure. The New York Times gave an example of "machinery that

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528-468: The system health and predict a breakdown before it happens. This strategy allows maintenance to be performed more efficiently, since more up-to-date data is obtained about how close the product is to failure. Predictive replacement is the replacement of an item that is still functioning properly. Usually it is a tax-benefit based replacement policy whereby expensive equipment or batches of individually inexpensive supply items are removed and donated on

552-480: Was introduced to try to maintain the correct equipment at the right time. CBM is based on using real-time data to prioritize and optimize maintenance resources. Observing the state of the system is known as condition monitoring . Such a system will determine the equipment's health, and act only when maintenance is actually necessary. Developments in recent years have allowed extensive instrumentation of equipment, and together with better tools for analyzing condition data,

576-563: Was re-designated as the Ogden Air Logistics Complex on 12 July 2012. Since 2012 the Complex has supervised the 309th Aerospace Maintenance and Regeneration Group at Davis-Monthan Air Force Base . This United States Air Force article is a stub . You can help Misplaced Pages by expanding it . Maintenance, repair, and operations Maintenance functions can be defined as maintenance, repair and overhaul ( MRO ), and MRO

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