StacksVerified U.S. regulatory reference

14 CFR §121.279

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Except as provided in paragraph (b) of this section, each airplane must have a means of individually stopping and restarting the rotation of any engine in flight.
  2. (b)In the case of turbine engine installations, a means of stopping the rotation need be provided only if the Administrator finds that rotation could jeopardize the safety of the airplane.