SCOPE

This Aerospace Information Report (AIR) is a general overview of typical airborne engine vibration monitoring (EVM) systems applicable to fixed or rotary wing aircraft applications, with an emphasis on system design considerations. It describes EVM systems currently in use and future trends in EVM development. The broader scope of Health and Usage Monitoring Systems, (HUMS ) is covered in SAE documents AS5391, AS5392, AS5393, AS5394, AS5395, AIR4174.

Purpose

The purpose of this AIR is to provide information and guidance for the selection, installation, and use of EVM systems and their elements. This AIR is not intended as a legal document but only as a technical guide.