CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER C—AIRCRAFT (parts 21 to 50) > PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT > SUBPART D—Design and Construction (§29.601 to §29.873) > 29.661—Rotor blade clearance.

29.661—Rotor blade clearance.

There must be enough clearance between the rotor blades and other parts of the structure to prevent the blades from striking any part of the structure during any operating condition.

Code of Federal Regulations

[Amdt. 29-3, 33 FR 967, Jan. 26, 1968]