Sec. 91.117 - Aircraft speed.
(a) Unless otherwise authorized by the Administrator, no person may
operate an aircraft below 10,000 feet MSL at an indicated airspeed of more
than 250 knots (288 m.p.h.).
(b) Unless otherwise authorized or required by ATC, no person may
operate an aircraft at or below 2,500 feet above the surface within 4
nautical miles of the primary airport of a Class C or Class D airspace
area at an indicated airspeed of more than 200 knots (230 mph.). This
paragraph (b) does not apply to any operations within a Class B airspace
area. Such operations shall comply with paragraph (a) of this section.
(c) No person may operate an aircraft in the airspace underlying a
Class B airspace area designated for an airport or in a VFR corridor
designated through such a Class B airspace area, at an indicated airspeed
of more than 200 knots (230 mph).
(d) If the minimum safe airspeed for any particular operation is
greater than the maximum speed prescribed in this section, the aircraft
may be operated at that minimum speed.
[Doc. No. 18334, 54 FR 34292, Aug. 18, 1989, as amended by Amdt.
91-219, 55 FR 34708, Aug. 24, 1990; Amdt. 91-227, 56 FR 65657, Dec. 17,
1991; Amdt. 91-233, 58 FR 43554, Aug. 17, 1993]