---
kind: "section"
citation: "14 C.F.R. § 121.511"
title: "14"
number: "121.511"
heading: "Flight time limitations: Flight engineers: airplanes."
url: "https://uscodex.org/cfr/14/121.511"
---

# §121.511. Flight time limitations: Flight engineers: airplanes.

- (a) In any operation in which one flight engineer is serving the flight time limitations in §§ [121.503](/cfr/14/121.503.md) and [121.505](/cfr/14/121.505.md) apply to that flight engineer.
- (b) In any operation in which more than one flight engineer is serving and the flight crew contains more than two pilots the flight time limitations in [§ 121.509](/cfr/14/121.509.md) apply in place of those in [§ 121.505](/cfr/14/121.505.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).