CFR › Title 14 › Part 27 › §27.67914 CFR §27.679Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkIf there is a device to lock the control system with the rotorcraft on the ground or water, there must be means to—(a)Give unmistakable warning to the pilot when the lock is engaged; and(b)Prevent the lock from engaging in flight.