Airworthiness Standards; Aircraft Engine Standards Overtorque Limits

This rule will amend the certification standards for aircraft engines to establish requirements for approval of maximum engine overtorque. Specifically, this action will add a new engine overtorque test, amend engine ratings and operating limits, and define maximum engine overtorque for certain turbopropeller and turboshaft engines. The rule will harmonize applicable United States (U.S.) and European standards and simplify airworthiness approvals for import and export of aircraft engines.