AC 20-66A, ADVISORY CIRCULAR, VIBRATION AND FATIGUE EVALUATION OF AIRPLANE PROPELLERS (7 SEP 2001)

AC 20-66A, ADVISORY CIRCULAR, VIBRATION AND FATIGUE EVALUATION OF AIRPLANE PROPELLERS (7 SEP 2001)., This advisory circular (AC) provides guidance and describes one method, but not the only method, for demonstrating compliance with §§23.907 and 25.907 of Title 14 of the Code of Federal Regulations, for the evaluation of vibration stresses on propellers installed on airplanes. Like all AC material, this AC is not, in itself, mandatory and does not constitute a regulation. While these guidelines are not mandatory, they are derived from extensive Federal Aviation Administration (FAA) and industry experience in determining compliance with the pertinent regulations.