14 CFR § 125.224 - Collision avoidance system.

---
identifier: "/us/cfr/t14/s125.224"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 125.224 - Collision avoidance system."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "125.224"
section_name: "Collision avoidance system."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS"
part_number: "125"
part_name: "CERTIFICATION AND OPERATIONS: AIRCRAFT HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6,000 POUNDS OR MORE; AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44705, 44710-44711, 44713, 44716-44717, 44722."
regulatory_source: "Docket 19779, 45 FR 67235, Oct. 9, 1980, unless otherwise noted."
cfr_part: "125"
---


# 125.224 Collision avoidance system.

Effective January 1, 2005, any airplane you operate under this part 125 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 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) 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 TSO C-118, or a later version, or(1)(3) A collision avoidance system and Mode S transponder that meet paragraph (a)(1) of this section. |

[Docket FAA-2001-10910, 68 FR 15903, Apr. 1, 2003]