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AIR1666B - Performance Testing of Lubricant Filter Elements Utilized in Aircraft Power and Propulsion Lubrication Systems

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Document Number: AIR1666B
Project Initiation: 07-17-2013
Project Number:
Revision Number: B
Sponsor Name: Puliyur V. Madhavan
Title
Performance Testing of Lubricant Filter Elements Utilized in Aircraft Power and Propulsion Lubrication Systems
Scope
This SAE Aerospace Information Report (AIR) reviews performance testing parameters for non-cleanable, often referred to as disposable, filter elements utilized in aircraft power and propulsion lubrication systems, including gas turbine engines and auxiliary power units (APUs), propulsion and transmission gear boxes, and constant speed drives and integrated drive generators (IDGs). This document is confined to laboratory testing of filter element performance to qualify the filtration medium and filter element construction as opposed to qualification of the complete filter assembly. The testing discussed here is usually followed by laboratory and on-engine testing of the entire lube filter assembly (including filter element, housing, valving, etc.), which is outside the scope of this AIR.
Rationale
The document has been revised to: (1) Include APUs in the scope and clarify the scope as being restricted to testing of filter element performance as opposed to filter assemblies, (2) Remove reference to NIST SRM2806 reference material for particle counter calibration since this material is no longer available, (3) Reference the Multi-pass Filter Element Performance test for measuring filtration efficiencies in terms of Filtration Ratios, and ARP5454 for the Multi-pass Filter Performance test procedure in place of ARP1827 since ARP5454 is applicable to lube filter elements, (4) Remove the gravimetric efficiency and Absolute Rating tests from the sequence of tests in Tables 1 and 3 since they are no longer used for lube filters for the applications referenced in the scope, (4) Clarify the inclusion of Flow Fatigue in the performance test sequence, (5) Clarify temperature and cycle time requirements for Cold Soak and Cold Start tests, (6) Add reference to AIR5455, and (7) Include editorial changes for clarity.
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