---
kind: "section"
citation: "40 C.F.R. § 1031.40"
title: "40"
number: "1031.40"
heading: "Turboprop engines."
url: "https://uscodex.org/cfr/40/1031.40"
---

# §1031.40. Turboprop engines.


The following standards apply to turboprop engines with rated output at or above 1,000 kW:

- (a) **Smoke.** Engines of a type or model for which the date of manufacture of the individual engine is on or after January 1, 1984, may not have a characteristic level for smoke number exceeding the following value:
- (b) [Reserved]

## Notes

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 87 FR 72351, Nov. 23, 2022, unless otherwise noted.