14 C.F.R. § 25.907 Propeller vibration.
Title 14 - Aeronautics and Space
(a) The magnitude of the propeller blade vibration stresses under any normal condition of operation must be determined by actual measurement or by comparison with similar installations for which these measurements have been made. (b) The determined vibration stresses may not exceed values that have been shown to be safe for continuous operation.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart E—Powerplant
General
§ 25.907 Propeller vibration.
