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SAE AIR4057 Revision B, September 1, 2012
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Secondary Filters for Fluid System Reliability
Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , September 2012
Page Count:8
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AIA/NAS Aerospace Standards
This SAE Aerospace Information Report (AIR) discusses the design choices and engineering trade-offs available to the system designer in the efficient selection and application of Last-Chance filters in contrast to main or primary system filters.

Purpose:

This document explains the use of secondary (or Last-Chance) filters in fluid systems.