---
kind: "section"
citation: "14 C.F.R. § 25.1553"
title: "14"
number: "25.1553"
heading: "Fuel quantity indicator."
url: "https://uscodex.org/cfr/14/25.1553"
---

# §25.1553. Fuel quantity indicator.


If the unusable fuel supply for any tank exceeds one gallon, or five percent of the tank capacity, whichever is greater, a red arc must be marked on its indicator extending from the calibrated zero reading to the lowest reading obtainable in level flight.


## Notes

### 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.