14 CFR · Part 35
14 CFR § 35.41
Overspeed and overtorque.
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:
Performance of 20 runs, each of 30 seconds duration, at the maximum propeller overspeed condition; or
Analysis based on test or service experience.
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:
Performance of 20 runs, each of 30 seconds duration, at the maximum propeller overtorque condition; or
Analysis based on test or service experience.
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source