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Standard

Acid Assay of Polyol Ester Lubricants

2019-09-11
WIP
ARP6670
This test method describes the procedure for the determination of the composition of the base stock of polyol ester lubricants by gas chromatography mass spectroscopy (GC-MS).
Standard

Assessment of Elastomer Volume Swelling Behavior in Aero and Aero-Derived Gas Turbine Engine Lubricants

2019-06-19
WIP
ARP7355
This method is used for determining the volume swelling effect of aero and aero-derived gas turbine engine lubricants (i.e. 5780)on elastomeric materials. Synthetic lubricating fluids for aircraft turbine engines must be compatible with materials of construction, such as elastomers used in the engines. Elastomers are used in seals, O rings, gaskets and related applications. This method is designed to determine the lubricating fluid elastomer compatibility behavior relative to volume swell of the elastomeric material.
Standard

Aviation Lubricant Tribology Evaluator (ALTE) Method to Determine the Lubricating Quality of Gas Turbine Lubricants

2019-06-12
WIP
ARP6255A
Employing ‘ball-on-cylinder’ philosophy, a non-rotating steel ball is held in a vertically mounted chuck and using an applied load is forced against an axially mounted steel cylinder. The test cylinder is rotated at a fixed speed while being partially immersed in a lubricant reservoir. This maintains the cylinder in a wet condition and continuously transports a lubricating film of test fluid to the ball and cylinder interface. The diameter of the wear scar generated on the test ball is used as a measure of the fluid’s lubricating properties. The apparatus can be used, by adjusting the operating conditions, to reproduce two different wear mechanisms; mild and severe wear, the ALTE therefore has the ability to assess a lubricant’s performance in that regard.
Standard

Bearing Corrosion Test Method

1994-07-01
HISTORICAL
ARP4249
This SAE Aerospace Recommended Practice (ARP) is intended to evaluate corrosion inhibiting properties of synthetic gas turbine lubricants and gearbox oils.
Standard

Bearing Corrosion Test Method

2015-08-28
CURRENT
ARP4249A
This SAE Aerospace Recommended Practice (ARP) is intended to evaluate corrosion inhibiting properties of synthetic gas turbine lubricants and gearbox oils.
Standard

Change Management Considerations for Aero Gas Turbine Engine Lubricants Under SAE AS5780

2017-02-14
WIP
AIR6918
this document is intended as an educational guide that outlines the types of changes to synthetic turbine oils managed by the AS5780 Qualified Product Group (QPG). The document describes and provides examples for the Management of Change classifications listed in AS5780 Section 10 and as appropriate links these to the allowable Manufacturing Tolerances listed in AS5780 Section 7. The document also describes the oil certification differences between Major and Minor changes being evaluated by the AS5780 QPG.
Standard

Compatibility of Turbine Lubricating Oils

2019-07-16
WIP
ARP7120
This method is used for determining the compatibility of a candidate lubricant with specific reference lubricants. The reference lubricants will typically be mandated by the product specification against which the candidate lubricant is being compared. This method is based on Federal Standard 791 method 3403 and Defence Standard 05-50 (Part 61) method 24, incorporating the modifications called for in SAE AS5780.
Standard

Evaluation of Coking Propensity of Aviation Lubricants Using the Hot Liquid Process Simulator (HLPS) Single Phase Flow Technique

2003-07-03
HISTORICAL
ARP5996A
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under single phase flow conditions found in certain parts of gas turbine engines, for instance in bearing feed tubes. This method is applicable to lubricants with a coking propensity, as determined by this method, falling in the range 0.01 to 3.00 mg.
Standard

Evaluation of Coking Propensity of Aviation Lubricants Using the Single Phase Flow Technique

2014-01-02
HISTORICAL
ARP5996B
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under single phase flow conditions found in certain parts of gas turbine engines, for instance in bearing feed tubes. This method is applicable to lubricants with a coking propensity, as determined by this method, falling in the range 0.01 to 3.00 mg.
Standard

Evaluation of Coking Propensity of Aviation Lubricants Using the Single Phase Flow Technique

2015-12-17
CURRENT
ARP5996C
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under single phase flow conditions found in certain parts of gas turbine engines, for instance in bearing feed tubes. This method is applicable to lubricants with a coking propensity, as determined by this method, falling in the range 0.01 to 5.00 mg.
Standard

Evaluation of Coking Propensity of Aviation Lubricants in an Air-Oil Mist Environment using the Vapor Phase Coker

2019-07-08
WIP
ARP5921A
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under two phase air-oil mist conditions as found in certain parts of a gas turbine engine, for instance, bearing chamber vent lines. Based on the results from round robin data in 2008-2009 from four laboratories, this method is currently intended to provide a comparison between lubricants as a research tool; it is not currently a satisfactory pass/fail test. At this juncture a reference oil may improve reproducibility (precision between laboratories); a formal precision statement will be given when there is satisfactory data and an agreed on, suitable reference oil if applicable.
Standard

Evaluation of Coking Propensity of Aviation Lubricants in an Air-Oil Mist Environment using the Vapor Phase Coker

2014-04-03
CURRENT
ARP5921
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under two phase air-oil mist conditions as found in certain parts of a gas turbine engine, for instance, bearing chamber vent lines. Based on the results from round robin data in 2008–2009 from four laboratories, this method is currently intended to provide a comparison between lubricants as a research tool; it is not currently a satisfactory pass/fail test. At this juncture a reference oil may improve reproducibility (precision between laboratories); a formal precision statement will be given when there is satisfactory data and an agreed on, suitable reference oil if applicable.
Standard

Evaluation of Gas Turbine Engine Lubricant Compatibility with Elastomer O-Rings

2011-09-01
CURRENT
ARP6179
This test method provides procedures for exposing specimens of elastomer materials (AS 568-214 size O-rings) representative of those used in gas turbine engines to lubricants or reference fluids under defined time and temperature conditions. This test includes both suspended and compressed O-rings. Resultant changes in the O-ring’s physical properties (tensile strength, elongation, hardness, mass, volume, and compression set) are measured to determine the amount of deterioration of the elastomer.
Standard

FZG Test Review

2017-02-28
WIP
AIR6919
Over the past several years the FZG A/8.3/90 test method has been used to evaluate current qualified aviation lubricants. The results of the effort have been summarized in this document as a historical reference to document the findings made from the committee.
Standard

Jet Oil Thermal Aging Test Procedure

2014-03-12
WIP
ARP6299
This method is designed to evaluate the changes in the chemical and physical properties of gas turbine engine lubricants subjected to elevated temperaures in the presence of air. The results are primarily applicable to low-oil-consumption gas turbine engines which do not experience regular additions of top-off oil. This is the initial documentation of this procedure and is intended to harmonize test procedures and report. The industry will need to conduct a round robin based on this procedure to develop precision statements.
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