StacksVerified U.S. regulatory reference

14 CFR §27.1151

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)It must be impossible to apply the rotor brake inadvertently in flight.
  2. (b)There must be means to warn the crew if the rotor brake has not been completely released before takeoff.