---
kind: "section"
citation: "14 C.F.R. § 121.525"
title: "14"
number: "121.525"
heading: "Flight time limitations: Pilots serving in more than one kind of flight crew."
url: "https://uscodex.org/cfr/14/121.525"
---

# §121.525. Flight time limitations: Pilots serving in more than one kind of flight crew.

- (a) This section applies to each pilot assigned during any 30 consecutive days to more than one type of flight crew.
- (b) The flight time limitations for a pilot who is scheduled for duty aloft for more than 20 hours in two-pilot crews in 30 consecutive days, or whose assignment in such a crew is interrupted more than once in any 30 consecutive days by assignment to a crew of two or more pilots and an additional flight crewmember, are those listed in [§§ 121.503 through 121.509](/cfr/14/121.503..121.509.md), as appropriate.
- (c) Except for a pilot covered by [paragraph (b)](#b) of this section, the flight time limitations for a pilot scheduled for duty aloft for more than 20 hours in two-pilot and additional flight crewmember crews in 30 consecutive days or whose assignment in such a crew is interrupted more than once in any 30 consecutive days by assignment to a crew consisting of three pilots and an additional flight crewmember, are those set forth in [§ 121.521](/cfr/14/121.521.md).
- (d) The flight time limitations for a pilot to whom paragraphs [(b)](#b) and [(c)](#c) of this section do not apply, and who is scheduled for duty aloft for a total of not more than 20 hours within 30 consecutive days in two-pilot crews (with or without additional flight crewmembers) are those set forth in [§ 121.523](/cfr/14/121.523.md).
- (e) The flight time limitations for a pilot assigned to each of two-pilot, two-pilot and additional flight crewmember, and three-pilot and additional flight crewmember crews in 30 consecutive days, and who is not subject to paragraph [(b)](#b), [(c)](#c), or [(d)](#d) of this section, are those listed in [§ 121.523](/cfr/14/121.523.md).

## Notes

### Source

Source: Docket 6258, 29 FR 19218, Dec. 31, 1964; 30 FR 3639, Mar. 19, 1965, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 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).