Volume: 3Date: 2024-01-01Original Date: 2024-01-01Title: Section 121.305 - Flight and navigational equipment.Context:
Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED). SUBCHAPTER G - AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS. PART 121 - OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS. Subpart K - Instrument and Equipment Requirements.
§ 121.305Flight and navigational equipment.No person may operate an airplane unless it is equipped with the following flight and navigational instruments and equipment:
(a) An airspeed indicating system with heated pitot tube or equivalent
means for preventing malfunctioning due to icing.
Code of Federal Regulations /
Title 14 - Aeronautics and Space /
Vol. 3 / 2024-01-01116
(b) A sensitive altimeter.(c) A sweep-second hand clock (or approved equivalent).(d) A free-air temperature indicator.(e) A gyroscopic bank and pitch indicator (artificial horizon).(f) A gyroscopic rate-of-turn indicator combined with an integral slip-skid indicator (turn-and-bank indicator) except that only a slip-skid indicator is required when a third attitude instrument system usable through flight attitudes of 360° of pitch and roll is installed in accordance with paragraph (k) of this section.(g) A gyroscopic direction indicator (directional gyro or equivalent).(h) A magnetic compass.(i) A vertical speed indicator (rate-of-climb indicator).(j) On the airplane described in this paragraph, in addition to two gyroscopic bank and pitch indicators (artificial horizons) for use at the pilot stations, a third such instrument is installed in accordance with paragraph (k) of this section:(1) On each turbojet powered airplane.(2) On each turbopropeller powered airplane having a passenger-seat configuration of more than 30 seats, excluding each crewmember seat, or a payload capacity of more than 7,500 pounds.(3) On each turbopropeller powered airplane having a passenger-seat configuration of 30 seats or fewer, excluding each crewmember seat, and a payload capacity of 7,500 pounds or less that is manufactured on or after March 20, 1997.(4) After December 20, 2010, on each turbopropeller powered airplane having a passenger seat configuration of 10-30 seats and a payload capacity of 7,500 pounds or less that was manufactured before March 20, 1997.(k) When required by paragraph (j) of this section, a third gyroscopic bank-and-pitch indicator (artificial horizon) that:(1) Is powered from a source independent of the electrical generating system;(2) Continues reliable operation for a minimum of 30 minutes after total failure of the electrical generating system;(3) Operates independently of any other attitude indicating system;(4) Is operative without selection after total failure of the electrical generating system;(5) Is located on the instrument panel in a position acceptable to the Administrator that will make it plainly visible to and usable by each pilot at his or her station; and(6) Is appropriately lighted during all phases of operation.