---
kind: "section"
citation: "14 C.F.R. § 91.221"
title: "14"
number: "91.221"
heading: "Traffic alert and collision avoidance system equipment and use."
url: "https://uscodex.org/cfr/14/91.221"
---

# §91.221. Traffic alert and collision avoidance system equipment and use.

- (a) **All airspace: U.S.-registered civil aircraft.** Any traffic alert and collision avoidance system installed in a U.S.-registered civil aircraft must be approved by the Administrator.
- (b) **Traffic alert and collision avoidance system, operation required.** Each person operating an aircraft equipped with an operable traffic alert and collision avoidance system shall have that system on and operating.

## Notes

### Source

Source: Docket 18334, 54 FR 34304, Aug. 18, 1989, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 40101, 40103, 40105, 40113, 40120, 44101, 44111, 44701, 44704, 44709, 44711, 44712, 44715,44716, 44717, 44722, 44740, 46306, 46315, 46316, 46504, 46506-46507, 47122, 47508,47528-47531, 47534; Pub. L. 112-95, 126 Stat. 11; Pub. L. 114-190, 130 Stat. 615 (49 U.S.C. 44703 note); sec. 828, Pub. L. 118-63, 138 Stat. 1330 (49 U.S.C. 44703 note); articles 12 and 29 of the Convention on International Civil Aviation, 61 Stat. 1180.