---
kind: "section"
citation: "14 C.F.R. § 29.969"
title: "14"
number: "29.969"
heading: "Fuel tank expansion space."
url: "https://uscodex.org/cfr/14/29.969"
---

# §29.969. Fuel tank expansion space.


Each fuel tank or each group of fuel tanks with interconnected vent systems must have an expansion space of not less than 2 percent of the combined tank capacity. It must be impossible to fill the fuel tank expansion space inadvertently with the rotorcraft in the normal ground attitude.


## Notes

### Amendments

[Amdt. 29-26, 53 FR 34217, Sept. 2, 1988]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704.

### Source

Source: Docket No. 5084, 29 FR 16150, Dec. 3, 1964, unless otherwise noted.

### Amendments

[Amdt. 29-26, 53 FR 34217, Sept. 2, 1988]