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Isolation and Corrosion Protection of Dissimilar Materials, Carbon Composite Structure Repair

AMS G9 Aerospace Sealing Committee
  • Aerospace Standard
  • ARP4118B
  • Current
Published 2019-07-09 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) provides methods and guidelines for isolating dissimilar repair patch materials from carbon fiber reinforced plastic (herein also referred to as carbon composite) structure during a repair operation.
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Aerospace Work Platforms — More than Meets the Eye

  • Magazine Article
  • TBMG-34545
Published 2019-06-01 by Tech Briefs Media Group in United States

For maintenance personnel in the aerospace industry to do their jobs effectively, they need to be able to get physically close to the equipment they are working on. This statement sounds obvious, but in order to meet this requirement, it is very important to utilize quality work platforms. Although most people are familiar with the basic uses of work platforms, there is not always much thought given to everything that goes into their design and fabrication.

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Landing Gear Common Repair

A-5B Gears, Struts and Couplings Committee
  • Aerospace Standard
  • AIR5885A
  • Current
Published 2019-04-11 by SAE International in United States
This document outlines the most common repairs used on landing gear components. It is not the intention of this AIR to replace overhaul/component maintenance or technical order manuals, but it can serve as a guide into their preparation. Refer to the applicable component drawings and specifications for surface finish, thickness, and repair processing requirements. This document may also be used as a guide to develop an MRB (Material Review Board) plan. The repairs in this document apply to components made of metallic alloys. These repairs are intended for new manufactured components and overhauled components, including original equipment manufacturer (OEM)/depot and in-service repairs. The extent of repair allowed for new components as opposed to in-service components is left to the cognizant engineering authorities. Reference could be made to this document when justifying repairs on landing gears. For repairs outside the scope of this document, a detailed justification is necessary. Landing gear repair is often a combination of several repair types defined herein. It must be understood that all the repairs listed in this document are not…
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Off-Road Rim Maintenance Procedures and Service Precautions Diameter Code 20 and Larger

MTC8, Tire and Rim
  • Ground Vehicle Standard
  • J1337_201902
  • Current
Published 2019-02-21 by SAE International in United States
This SAE Recommended Practice covers the important fundamental maintenance and service precautions for all off-road single-piece and multi-piece rims. Detailed information on specific procedures concerning mounting, demounting, maintenance, and service of a particular type, style, or design of off-road rim assembly can be obtained by consulting rim or tire manufacturers or distributors. These procedures and service precautions should be considered in preparation of the machine service manual, the operator's manual, and workplace procedures.
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Micro-Robot Climbs on Vertical and Upside-Down Conductive Surfaces

  • Magazine Article
  • TBMG-33710
Published 2019-02-01 by Tech Briefs Media Group in United States

Jet engines can have up to 25,000 individual parts, making regular maintenance a tedious task that can take more than a month per engine. Many components are located deep inside the engine and cannot be inspected without taking the machine apart. This problem is not confined to jet engines; many complicated, expensive machines like generators and scientific instruments require large investments of time and money to inspect and maintain.

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Applicable Aircraft Integrated Vehicle Health Management (IVHM) Regulations, Policy, and Guidance

HM-1 Integrated Vehicle Health Management Committee
  • Aerospace Standard
  • AIR6900
  • Current
Published 2019-01-14 by SAE International in United States
This AIR lists and describes a collection of regulations, policy, and guidance documents applicable to design approval applicants, aircraft operating certificate holders, and maintenance repair and overhaul (MRO) organizations. The aircraft industry should consider these rules when installing IVHM technology for use in aircraft maintenance. This is a starting basis and should not be considered as complete when certification of an IVHM system is expected. The AIR’s objectives are: 1 To set the foundation for aircraft certification applicants seeking to design IVHM solutions as part of the type certificate (TC), supplemental type certificate (STC), amended TC, or amended STC activities; and 2 To set the foundation for aircraft operating certificate holders to engage with regulators to get authorization for using IVHM applications as part of an aircraft maintenance program. NOTE: This AIR’s scope is limited to the United States (U.S.) Federal Aviation Administration (FAA) information only in this version, but future revisions intend to include other regulator input.
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Condition-Based Maintenance in Aviation: The History, The Business and The Technology

drR2 Consulting-Ravi Rajamani
  • Progress In Technology (PT)
  • PT-193
Published 2018-12-11 by SAE International in United States

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.

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A Process for Utilizing Aerospace Propulsion Health Management Systems for Maintenance Credit

E-32 Aerospace Propulsion Systems Health Management
  • Aerospace Standard
  • ARP5987
  • Current
Published 2018-12-06 by SAE International in United States
The process detailed within this document is generic and can be applied to commercial and military applications. It applies to the entire end-to-end health management system throughout its lifecycle, covering on-board and on-ground elements. The practical application of this standardized process is detailed in the form of a checklist. The on-board element described here are the source of the data acquisition used for off-board analysis. The on-board aspects relating to safety of flight, pilot notification, etc., are addressed by the other SAE Committees standards and documents. This document does not prescribe hardware or software assurance levels, nor does it answer the question “how much mitigation and evidence are enough”. The criticality level and mitigation method will be determined between the ‘Applicant’ and the regulator. In order to provide some detailed guidance utilizing the process and checklist, some high-level examples of previous successful cases of Maintenance Credit applications are included. At this point, it is incumbent on the ‘Applicant’ to explain any differences in terminology between the health management system they are seeking a credit for…
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Unique Lift System Enables Installation and Servicing of Large Telescope Mirrors

  • Magazine Article
  • TBMG-33081
Published 2018-10-01 by Tech Briefs Media Group in United States

The Large Synoptic Survey Telescope (LSST), under construction atop 8,737-foot El Peñón peak in northern Chile, is a partnership project of the National Science Foundation (NSF) and the Department of Energy (DOE). The goal of the LSST, scheduled to be fully operational in 2022, is to conduct a ten-year survey that will deliver a 200-petabyte set of images and data addressing some of the most pressing questions about the structure and evolution of the universe and the objects within it. The LSST will conduct a deep survey over an enormous area of sky and do it with a frequency that enables images of every part of the visible sky to be obtained every few nights. This mode will continue for ten years to achieve astronomical catalogs thousands of times larger than have been previously compiled.

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Teaching Points for a Class on “Critical Issues in Composite Maintenance, Repair and Overhaul”

AMS CACRC Commercial Aircraft Composite Repair Committee
  • Aerospace Standard
  • AIR5719A
  • Current
Published 2018-09-05 by SAE International in United States
This document is to be used as a checklist by curriculum developers to create courses or training for critical composite repair, maintenance, and overhaul issues. This document will not take the place of courses or training requirements for specific job roles of a composite repair technician, inspector or engineer.
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