StacksVerified U.S. regulatory reference

14 CFR §29.171

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The rotorcraft must be able to be flown, without undue pilot fatigue or strain, in any normal maneuver for a period of time as long as that expected in normal operation. At least three landings and takeoffs must be made during this demonstration.