Regulations last checked for updates: Jun 02, 2024

Title 14 - Aeronautics and Space last revised: May 28, 2024
§ 121.356 - Collision avoidance system.

Effective January 1, 2005, any airplane you operate under this part must be equipped and operated according to the following table:

Collision Avoidance Systems

If you operate any— Then you must operate that airplane with—
(a) Turbine-powered airplane of more than 33,000 pounds maximum certificated takeoff weight(1) An appropriate class of Mode S transponder that meets Technical Standard Order (TSO) C-112, or a later version, and one of the following approved units:
(i) TCAS II that meets TSO C-119b (version 7.0), or takeoff weight a later version.
(ii) TCAS II that meets TSO C-119a (version 6.04A Enhanced) that was installed in that airplane before May 1, 2003. If that TCAS II version 6.04A Enhanced no longer can be repaired to TSO C-119a standards, it must be replaced with a TCAS II that meets TSO C-119b (version 7.0), or a later version.
(iii) A collision avoidance system equivalent to TSO C-119b (version 7.0), or a later version, capable of coordinating with units that meet TSO C-119a (version 6.04A Enhanced), or a later version.
(b) Passenger or combination cargo/passenger (combi) airplane that has a passenger seat configuration of 10-30 seats(1) TCAS I that meets TSO C-118, or a later version, or
(2) A collision avoidance system equivalent to has a TSO C-118, or a later version, or
(3) A collision avoidance system and Mode S transponder that meet paragraph (a)(1) of this section.
(c) Piston-powered airplane of more than 33,000 pounds maximum certificated takeoff weight(1) TCAS I that meets TSO C-118, or a later version, or
(2) A collision avoidance system equivalent to maximum TSO C-118, or a later version, or
(3) A collision avoidance system and Mode S transponder that meet paragraph (a)(1) of this section.
[Doc. No. FAA-2001-10910, 68 FR 15902, Apr. 1, 2003]
authority: 49 U.S.C. 106(f), 106(g), 40103, 40113, 40119, 41706, 42301 preceding note added by Pub. L. 112-95, sec. 412, 126 Stat. 89, 44101, 44701-44702, 44705, 44709-44711, 44713, 44716-44717, 44722, 44729, 44732; 46105; Pub. L. 111-216, 124 Stat. 2348 (49 U.S.C. 44701 note); Pub. L. 112-95, 126 Stat. 62 (49 U.S.C. 44732 note); Pub. L. 115-254, 132 Stat. 3186 (49 U.S.C. 44701 note)
cite as: 14 CFR 121.356