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AIR1289A - Evaluation of Helicopter Turbine Engine Linear Vibration Environment

Details
Document Number: AIR1289A
Revision Number: A
Title
Evaluation of Helicopter Turbine Engine Linear Vibration Environment
Scope
This SAE Aerospace Information Report (AIR) outlines a recommended procedure for evaluation of the vibration environment to which the gas turbine engine powerplant is subjected in the helicopter installation. This analysis of engine vibration is normally demonstrated on a one-time basis upon initial certification, or after a major modification, of an engine/helicopter configuration. This AIR deals with linear vibration as measured on the basic case structure of the engine and not, for example, torsional vibration in drive shafting or vibration of a component within the engine such as a compressor or turbine airfoil. In summary, this AIR discusses the engine manufacturer's 'Installation Test Code' aspects of engine vibration and proposes an appropriate measurement method.
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