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Standard

Recommended Maintenance, Inspection and Monitoring Procedure for Engine Test Cells

2018-12-20
WIP
ARP8540
A guide to maintenance procedures in test cells. A suggested equipment monitoring and/or inspections to reduce the probability of unanticipated failures and associated test cell down time. Guidelines for using typically available data acquisition capabilities in a test cell are provided to utilize normally available trending capability to monitor the testing equipment in addition to using these tools for the usual monitoring of the test article. For the common types of test cells (turboshaft, turboprop, turbojet, and turbofan) test facilities, lists of typical systems with their associated components are provided with suggested inspection intervals and key items to look for in the inspection. A template risk assessment form is provided to facilitate the customization of the assessment of the test cell components to help predict recommended spares.
Standard

Gland Design, Elastomeric O-Ring Seals, General Considerations

2018-12-19
WIP
ARP1231C
This document establishes general gland design criteria for static and dynamic O-ring seal applications used in fluid systems and at fluid pressures common to the aerospace industry. Detailed discussion of design criteria and tables of recommended gland dimensions are contained in the documents listed in Table 1. S.I. unit conversions for U.S. customary units have been provided for reference purposes.
Standard

Gland Design, Elastomeric O-Ring Seals, Static Radial

2018-12-19
WIP
ARP1232C
This document establishes standard gland dimensions for static radial O-ring seal applications and provides recommendations for modifying these glands in applications. No provisions are made in this document for anti- extrusion devices. SI unit conversions for U.S. customary units have been provided for reference purposes.
Standard

Gland Design, Elastomeric O-Ring Seals, Dynamic Radial, 1500 psi Max

2018-12-19
WIP
ARP1233B
The purpose of this document is to provide the aerospace industry with standardized dimensional criteria for dynamic radial elastomeric O-ring seal glands. It is intended for use in conjunction with ARP 1231, "Gland Design, Elastomeric O-Ring Seals, General Considerations". This document establishes standard gland design criteria and dimensions for dynamic radial O-ring seal applications and provides recommendations for modifying these glands in special applications. There are no provisions in this document for anti- extrusion devices.
Standard

Gland Design, Elastomeric O-Ring Seals, Static Axial, Without Back-Up Rings

2018-12-19
WIP
ARP1234C
The purpose of this document is to provide the aerospace industry with standardized dimensional criteria for static axial elastomeric O-ring seal glands, without back-up rings. It supplements ARP 1231, "Gland Design, Elastomeric O-Ring Seals, General Considerations". This document establishes standard gland design criteria and dimensions for static axial O-ring seal applications without anti-extrusion devices. SI Unit conversions for U.S. Customary Units have been provided for reference purposes. The criteria herein are similar, but not identical, to those in MIL-G-5514.
Standard

Hose Assembly, Polytetrafluoroethylene, Metallic Reinforced, Up to 1500 psi and 450 °F, Hydraulic and Pneumatic

2018-12-19
CURRENT
AS1946F
This SAE Aerospace Standard (AS) defines the requirements for polytetrafluoroethylene (PTFE) lined, metallic reinforced, hose assemblies suitable for use in aerospace hydraulic, fuel, and lubricating oil systems at temperatures between 67 °F and 450 °F for Class I assemblies, -67 °F and 275 °F for Class II assemblies, and at nominal pressures up to 1500 psi. The hose assemblies are also suitable for use within the same temperature and pressure limitations in aerospace pneumatic systems where some gaseous diffusion through the wall of the PTFE liner can be tolerated. The use of these hose assemblies in pneumatic storage systems is not recommended. In addition, installations in which the limits specified herein are exceeded, or in which the application is not covered specifically by this standard, for example oxygen, shall be subject to the approval of the procuring activity.
Standard

Airworthiness Assurance for Airborne Electronic Hardware (AEH) Containing Commercial-off-the-shelf (COTS) Electronic Components

2018-12-19
WIP
ARP7495
This document addresses issues related to assurance that COTS electronic hardware components will perform their intended function in the AEH equipment or system in which they are installed. Those issues may impact system design, reliability assessment, quality, testing, production or support; but this document is not intended to be specific to any of those disciplines. This document is focused on the hardware issues raised in DOT/FAA/TC-16/57; it does not include issues related to software, firmware, etc. This document is intended to fit within the development process for civil aircraft and systems. This document can be used to support design and analysis activities in RTCA DO-254/EUROCAE ED-80 and RTCA DO-297/EUROCAE ED-124, as well as SAE ARP4754. This document addresses twelve (12) of the twenty-six (26) specific issues described in DOT/FAA/TC-16/57.
Standard

Electroless Nickel-Boron Plating

2018-12-19
CURRENT
AMS2399B
This specification covers the engineering requirements for electroless deposition of nickel-boron on various materials and the properties of the deposit.
Standard

Plating, Tin-Lead (Electrodeposited)

2018-12-19
CURRENT
AMSP81728C
This specification covers the requirements for electrodeposited tin-lead plating intended for use as a coating for corrosion protection and as a base for soldering.
Standard

Global eLoran User Equipment Interface Standard

2018-12-18
WIP
SAE1012
There are numerous GUE Interface Standards in use that provide some form of timing and/or position information. This document identifies many of these standards and provides the data required to substitute an eLoran receiver for a GPS receiver.
Standard

Passivation of Corrosion Resistant Steels

2018-12-18
WIP
AMS2700G
This specification covers the requirements for a process to assure removal of free iron or other less noble contaminants from the surfaces of corrosion resistant steel parts.
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