---
kind: "section"
citation: "14 C.F.R. § 121.641"
title: "14"
number: "121.641"
heading: "Fuel supply: Nonturbine and turbo-propeller-powered airplanes: Flag operations."
url: "https://uscodex.org/cfr/14/121.641"
---

# §121.641. Fuel supply: Nonturbine and turbo-propeller-powered airplanes: Flag operations.

- (a) No person may dispatch or take off a nonturbine or turbo-propeller-powered airplane unless, considering the wind and other weather conditions expected, it has enough fuel—
  - (1) To fly to and land at the airport to which it is dispatched;
  - (2) Thereafter, to fly to and land at the most distant alternate airport specified in the dispatch release; and
  - (3) Thereafter, to fly for 30 minutes plus 15 percent of the total time required to fly at normal cruising fuel consumption to the airports specified in [paragraphs (a)](#a) (1) and (2) of this section or to fly for 90 minutes at normal cruising fuel consumption, whichever is less.
- (b) No person may dispatch a nonturbine or turbo-propeller-powered airplane to an airport for which an alternate is not specified under [§ 121.621(a)(2)](/cfr/14/121.621.md?p=a-2), unless it has enough fuel, considering wind and forecast weather conditions, to fly to that airport and thereafter to fly for three hours at normal cruising fuel consumption.

## Notes

### Source

Source: Docket 6258, 29 FR 19222, Dec. 31, 1964, 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).