14 C.F.R. § 27.1303 Flight and navigation instruments.
Title 14 - Aeronautics and Space
The following are the required flight and navigation instruments: (a) An airspeed indicator. (b) An altimeter. (c) A magnetic direction indicator.
Title 14: Aeronautics and Space
PART 27—AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT
Subpart F—Equipment
General
§ 27.1303 Flight and navigation instruments.