---
kind: "section"
citation: "14 C.F.R. § 29.1141"
title: "14"
number: "29.1141"
heading: "Powerplant controls: general."
url: "https://uscodex.org/cfr/14/29.1141"
---

# §29.1141. Powerplant controls: general.

- (a) Powerplant controls must be located and arranged under [§ 29.777](/cfr/14/29.777.md) and marked under [§ 29.1555](/cfr/14/29.1555.md).
- (b) Each control must be located so that it cannot be inadvertently operated by persons entering, leaving, or moving normally in the cockpit.
- (c) Each flexible powerplant control must be approved.
- (d) Each control must be able to maintain any set position without—
  - (1) Constant attention; or
  - (2) **Tendency to creep due to control loads or vibration.**
- (e) Each control must be able to withstand operating loads without excessive deflection.
- (f) Controls of powerplant valves required for safety must have—
  - (1) For manual valves, positive stops or in the case of fuel valves suitable index provisions, in the open and closed position; and
  - (2) For power-assisted valves, a means to indicate to the flight crew when the valve—
    - (i) Is in the fully open or fully closed position; or
    - (ii) **Is moving between the fully open and fully closed position.**

## Notes

### Amendments

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-13, 42 FR 15046, Mar. 17, 1977; Amdt. 29-26, 53 FR 34219, 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

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-13, 42 FR 15046, Mar. 17, 1977; Amdt. 29-26, 53 FR 34219, Sept. 2, 1988]