Section 35.41 - Overspeed and overtorque(a) When the applicant seeks approval of a transient maximum propeller overspeed, the applicant must demonstrate that the propeller is capable of further operation without maintenance action at the maximum propeller overspeed condition. This may be accomplished by:(1) Performance of 20 runs, each of 30 seconds duration, at the maximum propeller overspeed condition; or(2) Analysis based on test or service experience.(b) When the applicant seeks approval of a transient maximum propeller overtorque, the applicant must demonstrate that the propeller is capable of further operation without maintenance action at the maximum propeller overtorque condition. This may be accomplished by:(1) Performance of 20 runs, each of 30 seconds duration, at the maximum propeller overtorque condition; or(2) Analysis based on test or service experience.Amdt. 35-8, 73 FR 63349 , Oct. 24, 2008