ARP6408 External Hydraulic Fluid Leakage Definition for Landing Gear Shock Absorbers

Current

11/16/2023

Features
Issuing Committee
Scope
Content
The purpose of this SAE Aerospace Recommended Practice (ARP) is to provide a practical definition of external hydraulic fluid leakage exhibited by landing gear shock absorbers/struts. The definition will outline normal (acceptable weepage) and excessive leakage (unacceptable leakage) of shock absorbers/struts that is measurable. The definition of leakage is applicable to new gear assemblies, refurbished/remanufactured (overhauled) shock absorbers/struts, leakage of shock absorbers/struts encountered during acceptance flights, newly delivered and in-service aircraft. This ARP is intended to provide guidelines for acceptable leakage of landing gear shock absorbers/struts between the ambient temperatures of -65 °F (-54 °C) and 130 °F (54 °C) and to outline the procedure for measuring such leakage. The specific limits that are applied to any particular aircraft shall be adjusted by the aircraft manufacturer before inclusion in the applicable maintenance manual.
Rationale
Content
A clear understanding of leakage definition will result in minimizing what is often the unnecessary removal of landing gear shock absorbers from an aircraft. The leakage definitions are intended to assess and control the quality, assembly and proper functioning of landing gear shock absorbers/struts in service.
ARP6408 has been reaffirmed to comply with the SAE Five-Year Review policy.
Meta TagsDetails
DOI
https://doi.org/10.4271/ARP6408
Pages
7
Citation
SAE International Recommended Practice, External Hydraulic Fluid Leakage Definition for Landing Gear Shock Absorbers, SAE Standard ARP6408, Reaffirmed November 2023, Issued July 2018, https://doi.org/10.4271/ARP6408.
Additional Details
Publisher
Published
Nov 16, 2023
Product Code
ARP6408
Content Type
Recommended Practice
Status
Current
Language
English

Revisions