CFR › Title 14 › Part 29 › §29.60114 CFR §29.601Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)The rotorcraft may have no design features or details that experience has shown to be hazardous or unreliable.(b)The suitability of each questionable design detail and part must be established by tests.