---
kind: "section"
citation: "14 C.F.R. § 25.999"
title: "14"
number: "25.999"
heading: "Fuel system drains."
url: "https://uscodex.org/cfr/14/25.999"
---

# §25.999. Fuel system drains.

- (a) Drainage of the fuel system must be accomplished by the use of fuel strainer and fuel tank sump drains.
- (b) **Each drain required by paragraph (a) of this section must—**
  - (1) Discharge clear of all parts of the airplane;
  - (2) Have manual or automatic means for positive locking in the closed position; and
  - (3) **Have a drain valve—**
    - (i) That is readily accessible and which can be easily opened and closed; and
    - (ii) That is either located or protected to prevent fuel spillage in the event of a landing with landing gear retracted.

## Notes

### Amendments

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-38, 41 FR 55467, Dec. 20, 1976]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-38, 41 FR 55467, Dec. 20, 1976]