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Standard

Vacuum Gauge Calibration
2019-03-06
CURRENT
ARP7446
This SAE Aerospace Recommended Practice (ARP) addresses the general procedure for the best practices for minimizing uncertainty when calibrating thermal conductivity and cold cathode vacuum gauges, which includes the vacuum sensor(s) and accompanying electronics necessary for a pressure measurement to be made. It also includes the best practices for an in-process verification where limitations make it impossible to follow the best practices for minimizing uncertainty. Verifying the accuracy and operation of vacuum gauges is critical to ensure the maintenance of processes while under vacuum.
Standard

Test Method for the Determination of Water Concentration in Polyol Ester and Diester Aerospace Lubricants by Coulometric Karl Fischer Titration
2022-11-02
CURRENT
ARP5991A
The test method describes the procedure for the direct determination of water concentration in polyol ester and diester based aerospace lubricants by commercially available automated coulometric Karl Fischer titration instruments. The method was validated to cover the water concentration range of 150 to 3500 µg/g. The method may also be suitable for the determination of water concentrations outside this range and for other classes of fluids; however, the precision statement shall not be applicable for such uses.
Standard

Test Method for the Determination of Water Concentration in Polyol Ester and Diester Aerospace Lubricants by Coulometric Karl Fischer Titration
2016-09-12
HISTORICAL
ARP5991
The test method describes the procedure for the direct determination of water concentration in polyol ester and diester based aerospace lubricants by the commercially available automated coulometric Karl Fischer titration instrument. The method was validated to cover the water concentration range of 150 to 3500 µg/g. The method may also be suitable for the determination of water concentrations outside this range and for other classes of fluids, however, the precision statement shall not be applicable for such uses.
Standard

TURBINE ENGINE PERFORMANCE STATION NUMBERING
1991-10-09
HISTORICAL
ARP755
The following recommended performance station numbering is an extension of the numbering presently available in appropriate military specifications.
Standard

THE DETERMINATION OF PARTICULATE CONTAMINATION IN LIQUIDS BY THE PARTICLE COUNT METHOD
1969-08-01
HISTORICAL
ARP598A
This method describes a procedure for the sizing and counting of particulate contamination in liquid samples by membrane filtration. The procedure will allow measurement of particulate contamination five microns or greater in size with a maximum variation of ±20% in results over an average of two runs. This procedure can be used for all samples where the membrane filter is compatible with the sample liquid and rinse liquid.
Standard

THE DETERMINATION OF PARTICULATE CONTAMINATION IN LIQUIDS BY THE PARTICLE COUNT METHOD
1991-11-01
HISTORICAL
ARP598B
This method describes a procedure for the sizing and counting of particulate contamination in liquid samples by membrane filtration. The procedure will allow measurement of particulate contamination five micrometres or greater in size with a maximum variation of ±20% in results over an average of two runs. This procedure can be used for all samples where the membrane filter is compatible with the sample liquid and rinse liquid. Section II of this procedure may be used to count any sample on a gridded membrane where particles are evenly distributed. This procedure is an alternative to counting with an automatic particle counter although results by each method from identical samples might not be equivalent due to individual idiosyncrasies in each technique.
Standard

Survival Kit - Life Rafts and Slide/Rafts
2000-08-01
HISTORICAL
ARP1282A
This SAE Aerospace Recommended Practice (ARP) establishes the minimum contents of and suggested supplements for survival kits for transport category airplanes flying over water areas during airline service.
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