Section 35.37 - Fatigue limits and evaluationThis section does not apply to fixed-pitch wood propellers of conventional design.
(a) Fatigue limits must be established by tests, or analysis based on tests, for propeller:(3) Blade retention components.(4) Components which are affected by fatigue loads and which are shown under § 35.15 to have a fatigue failure mode leading to hazardous propeller effects.(b) The fatigue limits must take into account:(1) All known and reasonably foreseeable vibration and cyclic load patterns that are expected in service; and(2) Expected service deterioration, variations in material properties, manufacturing variations, and environmental effects.(c) A fatigue evaluation of the propeller must be conducted to show that hazardous propeller effects due to fatigue will be avoided throughout the intended operational life of the propeller on either:(1) The intended airplane by complying with § 23.2400(c) or § 25.907 of this chapter, as applicable; orAmdt. 35-8, 73 FR 63348 , Oct. 24, 2008, as amended by Doc. FAA-2015-1621, Amdt. 35-10, 81 FR 96700 , Dec. 30, 2016