---
kind: "section"
citation: "14 C.F.R. § 27.1141"
title: "14"
number: "27.1141"
heading: "Powerplant controls: general."
url: "https://uscodex.org/cfr/14/27.1141"
---

# §27.1141. Powerplant controls: general.

- (a) Powerplant controls must be located and arranged under [§ 27.777](/cfr/14/27.777.md) and marked under [§ 27.1555](/cfr/14/27.1555.md).
- (b) Each flexible powerplant control must be approved.
- (c) 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.**
- (d) 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.**
- (e) For turbine engine powered rotorcraft, no single failure or malfunction, or probable combination thereof, in any powerplant control system may cause the failure of any powerplant function necessary for safety.

## Notes

### Amendments

[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27-12, 42 FR 15045, Mar. 17, 1977; Amdt. 27-23, 53 FR 34214, Sept. 2, 1988; Amdt. 27-33, 61 FR 21907, May 10, 1996]

### Authority

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

### Source

Source: Docket No. 5074, 29 FR 15695, Nov. 24, 1964, unless otherwise noted.

### Amendments

[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27-12, 42 FR 15045, Mar. 17, 1977; Amdt. 27-23, 53 FR 34214, Sept. 2, 1988; Amdt. 27-33, 61 FR 21907, May 10, 1996]