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Rotor Bar Testing – Growler (hack saw blade)

Test Overview

A common growler test where a hack saw blade is held above each rotor bar and checked for vibration and/or “buzzing” noise, signifying a broken or damaged rotor bar.

Test Deficiencies

The element of human interpretation makes this test unreliable for the purposes of communicating a diagnosis, with any degree of confidence, to a customer.


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