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Standard

Plain Bearing Selection for Landing Gear Applications

2018-04-18
CURRENT
AIR1594D
This document is intended to give advisory information for the selection of plain bearings and bearing materials most suitable for aircraft landing gear applications. Information included herein was derived from bearing tests and service experience/reports. Airframe/landing gear manufacturers, commercial airlines, the U.S. Air Force and Naval Air Systems Command provided input for the document. Information is given on bearing installation methods and fits that have given satisfactory performance and service life. Base metal corrosion is a major cause of problems in bearing installations for landing gears. Therefore, methods of corrosion prevention are discussed. Effort is directed toward minimizing maintenance and maximizing life expectancy of landing gear bearings. Lubricated and self-lubricating bearings are also discussed. There are wide ranges of bearing load and motion requirements for applications in aircraft landing gears.
Standard

Test Methods Standard; General Requirements, Suspect/Counterfeit, Electrical, Electronic, and Electromechanical Parts

2018-04-18
CURRENT
AS6171A
This SAE Aerospace Standard (AS) standardizes inspection and test procedures, workmanship criteria, and minimum training and certification requirements to detect Suspect/Counterfeit (SC) Electrical, Electronic, and Electromechanical (EEE) parts. The requirements of this document apply once a decision is made to use parts with unknown chain of custody that do not have pedigree back to the original component manufacturer or have been acquired from a broker or independent distributor, or when there are other known risk elements that result in the User/Requester to have concerns about potential SC EEE parts. The tests specified by this standard may also detect occurrences of malicious tampering, although the current version of this standard is not designed specifically for this purpose. This standard ensures consistency across the supply chain for test techniques and requirements based on assessed risk associated with the application, component, supplier, and other relevant risk factors.
Standard

Aluminum Alloy, Extrusions 4.4Cu - 1.5Mg - 0.60Mn (2024-T3511) Solution Heat Treated, Stress-Relieved by Stretching, and Straightened

2018-04-17
WIP
AMS4165J
This specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles, and tubing.

These extrusions have been used typically for parts subject to excessive warpage during machining due to residual stresses and for parts requiring high strength and whose fabrication does not normally involve welding, but usage is not limited to such applications.

Certain processing procedures may cause these extrusions to be susceptible to stress-corrosion cracking; SAE ARP 823 recommends practices to minimize such conditions.

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