§1031.50. Subsonic turbojet and turbofan engines at or below 26.7 kN thrust.
40 C.F.R. § 1031.50
The following standards apply to new turbofan or turbojet aircraft engines with rated output at or below 26.7 kN thrust that are installed in subsonic aircraft:
Smoke. Engines of a type or model for which the date of manufacture of the individual engine is on or after August 9, 1985 may not have a characteristic level for smoke number exceeding the lesser of 50 or the following value:
[Reserved]
Notes, amendments, and revision history
Authority
Authority: 42 U.S.C. 7401-7671q.
Source
Source: 87 FR 72351, Nov. 23, 2022, unless otherwise noted.