SAE AIR 4057B

This document has been declared Stabilized and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.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.This document explains the use of secondary (or Last-Chance) filters in fluid systems.

This product replaces:SAE AIR 4057A - Secondary Filters for Fluid Systems Reliability ( Reaffirmed: Dec 2004 )