---
kind: "section"
citation: "14 C.F.R. § 25.1555"
title: "14"
number: "25.1555"
heading: "Control markings."
url: "https://uscodex.org/cfr/14/25.1555"
---

# §25.1555. Control markings.

- (a) Each cockpit control, other than primary flight controls and controls whose function is obvious, must be plainly marked as to its function and method of operation.
- (b) Each aerodynamic control must be marked under the requirements of §§ [25.677](/cfr/14/25.677.md) and [25.699](/cfr/14/25.699.md).
- (c) **For powerplant fuel controls—**
  - (1) Each fuel tank selector control must be marked to indicate the position corresponding to each tank and to each existing cross feed position;
  - (2) If safe operation requires the use of any tanks in a specific sequence, that sequence must be marked on, or adjacent to, the selector for those tanks; and
  - (3) Each valve control for each engine must be marked to indicate the position corresponding to each engine controlled.
- (d) **For accessory, auxiliary, and emergency controls—**
  - (1) Each emergency control (including each fuel jettisoning and fluid shutoff must be colored red; and
  - (2) Each visual indicator required by [§ 25.729(e)](/cfr/14/25.729.md?p=e) must be marked so that the pilot can determine at any time when the wheels are locked in either extreme position, if retractable landing gear is used.

## 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.