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Standard

Engine Electrostatic Gas Path Monitoring

1999-03-01
HISTORICAL
AIR4986
Turbine engine malfunctions account for a substantial portion of the maintenance actions required to keep both fixed and rotary wing aircraft operational. Undetected incipient component failures can result in secondary engine damage and expensive unscheduled maintenance actions. Recent developments of electrostatic methods now provide the potential for the detection of foreign object ingestion and early detection of distress in gas path components. This SAE Aerospace Information Report (AIR) seeks to outline the history of the electrostatic technique and provides examples of state-of-the-art systems for both inlet and exhaust gas debris monitoring systems along with examples of most recent testing.
Standard

Composite and Bonded Structure Inspector: Training Document

1999-03-01
CURRENT
AIR5279
This document provides recommendations concerning the minimum knowledge and skill guidelines for a composite and metal bond repair inspector. Teaching levels have been assigned to this curriculum to define the knowledge, skills and abilities needed to inspect repairs. Minimum hours of instruction have been provided to ensure adequate lecture and laboratory coverage of all subject matter. These minimums may be exceeded, and may include an increase in the total number of training hours and/or increases in the teaching levels.
Standard

Composite and Bonded Structure Engineers: Training Document

1999-03-01
CURRENT
AIR5278
This document provides recommendations concerning the minimum knowledge and analytical skill guidelines for a composite and metal bond repair design engineer. Teaching levels have been assigned to this curriculum to define the knowledge, skills and abilities needed to design appropriate repairs. Minimum hours of instruction have been provided to ensure adequate lecture and laboratory coverage of all subject matter. These minimums may be exceeded, and may include an increase in the total number of training hours and/or increases in the teaching levels.
Standard

Safety Criteria for Pneumatic Starting Systems

1999-03-01
CURRENT
AIR1639A
This SAE Aerospace Information Report (AIR) presents safety criteria for pneumatic type engine starting system design and component hardware. Included are safety criteria in design of both starter control valves and starters as well as in design of airframe control systems. Safety topics concern starter valve operation and material application, airframe controls and instrumentation installations and starter rotor integrity and containment.
Standard

Reliability Program Standard Implementation Guide

1999-03-01
HISTORICAL
JA1000/1_199903
The importance of reliability in design engineering has significantly grown since the early Sixties. Competition has been a primary driver in this growth. The three realities of competition today are: world class quality and reliability, cost-effectiveness, and fast time-to-market. Formerly, companies could effectively compete if they could achieve at least two of these features in their products and product development processes, often at the expense of the third. However, customers today, whether military, aerospace, or commercial, have been sensitized to a higher level of expectation and demand products that are highly reliable, yet affordable. Product development practices are shifting in response to this higher level of expectation. Today, there is seldom time, or necessary resources to extensively test, analyze, and fix to achieve high quality and reliability.
Standard

Fittings, 24° Cone Flareless, Fluid Connection, 3000 psi

1999-03-01
HISTORICAL
AS18280
This SAE Aerospace Standard (AS) establishes the requirements for 24° cone flreless fluid connection fittings and nuts, internally or externally swaged or welded sleeves or tube end adapters used only with flareless fittings and bite type flreless sleeves (see Section 6) for use in aircraft fluid systems at nominal operating pressures up to and including 3000 psi.
Standard

Minimum Performance Standard for Airborne Head Up Display (HUD)

1999-03-01
HISTORICAL
AS8055
This SAE Aerospace Standard (AS) specifies minimum performance standards for airborne binocular Head Up Displays (HUDs) in fixed wing aircraft. This document covers criteria for conformal and non-conformal HUD systems that are intended for use in the cockpit by the pilot or copilot. Display minimum performance characteristics are specified for standard and other environmental conditions for the purpose of product qualification. This document does not address sensor imaging systems, displays worn by the pilot (goggles, helmet mounted displays) or specific symbology to be displayed.
Standard

Gas Turbine Engine Steady-State and Transient Performance Presentation for Digital Computer Programs

1999-03-01
HISTORICAL
AS681H
This Aerospace Standard (AS) provides the method for presentation of gas turbine engine steady-state and transient performance calculated using digital computer programs. It also provides for the presentation of parametric gas turbine data including performance, weight and dimensions computed by digital computer programs. This standard is intended to facilitate calculations by the program user without unduly restricting the method of calculation used by the program supplier.
Standard

Oxygen System and Component Cleaning and Packaging

1999-03-01
HISTORICAL
ARP1176
This SAE Aerospace Recommended Practice (ARP) provides recommended practices for cleaning aircraft oxygen equipment such as tubing, pieces parts (including regulator and valve parts), cylinders and ground-based equipment that may be used to support aircraft oxygen systems. These methods may apply to gaseous and liquid oxygen equipment. This document specifies work area details, methods to select suitable cleaning chemicals, cleaning methods, test methods to verify cleanliness level, and methods of packaging the components and parts after cleaning. Person designated to clean oxygen equipment should be qualified and trained to clean oxygen equipment. Cleanliness levels achieved are strongly dependent on the capabilities of the persons performing the cleaning operation.
Standard

Inlet Total-Pressure-Distortion Considerations for Gas-Turbine Engines

1999-03-01
HISTORICAL
AIR1419A
AIR1419 “Inlet Total Pressure Distortion Considerations for Gas Turbine Engines” documents engineering information for use as reference material and for guidance. Inlet total-pressure distortion and other forms of flow distortion that can influence inlet/engine compatibility require examination to establish their effect on engine stability and performance. This report centers on inlet-generated total-pressure distortion measured at the Aerodynamic Interface Plane (AIP), not because this is necessarily the sole concern, but because it has been given sufficient attention in the aircraft and engine communities to produce generally accepted engineering practices for dealing with it. The report does not address procedures for dealing with performance destabilizing influences other than those due to total-pressure distortion, or with the effects of any distortion on aeroelastic stability.
Standard

Aerospace Ground Equipment Criteria for a Propellant Transfer Unit

1999-01-01
CURRENT
AIR1129
The primary purpose of a Propellant Transfer Unit (PTU) is to temperature-condition and weigh a specific amount of propellant, and transfer if to a vehicle propellant tank. A secondary purpose of a PTU may be to drain propellant from the vehicle tank and return it to the transfer unit when required. The transfer unit may also be used for flushing the vehicle fill lines and transfer unit with appropriate flushing fluids, followed with nitrogen for the purpose of drying the lines and weigh tank. The transfer unit may include provisions for helium purging of the propellant transfer tank and lines, ad supplying a blanket of helium pressure to the transfer tank. Each PTU consists of a piping system with appropriate propellant and pneumatic valves, regulators, relief valves, filters and a propellant pump. Various components such as a scrubber, bubbler, propellant cooler (heat exchanger), propellant weigh tank, weigh scale and a chiller may make up the balance of the assembly.
Standard

Fuels in Ground Support Equipment (Other Than Gasoline or Diesel)

1999-01-01
HISTORICAL
AIR5373
This SAE Aerospace Information Report (AIR) is intended as a source of comparative information and is subject to change to keep pace with experience and technical advances. This document describes currently used fuels and fuels which may be used in the future. Conventional gasoline and diesel fuels are intentionally omitted from this document.
Standard

Data Word and Message Formats

1999-01-01
HISTORICAL
AS15532
The emphasis in this standard is the development of data word and message formats for AS15531 or MIL-STD-1553 data bus applications. This standard is intended as a guide for the designer to identify standard data words and messages for use in avionics systems and subsystems. These standard words and messages, as well as the documentation format for interface control document (ICD) sheets, provide the basis for defining 15531/1553 systems. Also provided in this standard is the method for developing additional data word formats and messages that may be required by a particular system but are not covered by the formats provided herein. It is essential that any new word formats or message formats that are developed for a 15531/1553 application follow the fundamental guidelines established in this standard in order to ease future standardization of these words and messages. The standard word formats presented represent a composite result of studies conducted by the U.S.
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