StacksVerified U.S. regulatory reference

14 CFR §23.2425

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The installed powerplant must operate without any hazardous characteristics during normal and emergency operation within the range of operating limitations for the airplane and the engine.
  2. (b)The pilot must have the capability to stop the powerplant in flight and restart the powerplant within an established operational envelope.