§1031.90 Supersonic engines.

The following standards apply to new engines installed in supersonic airplanes:

(a) Smoke. Engines of a type or model for which the date of manufacture was on or after January 1, 1984, may not have a characteristic level for smoke number exceeding an emission standard that is the lesser of 50 or the following:

SN = 83.6�rO ^?0.274

(b) [Reserved]

(c) HC. Engines of a type or model for which the date of manufacture was on or after January 1, 1984, may not have a characteristic level for HC exceeding the following emission standard in g/kN rated output:

HC = 140�0.92 ^rPR

(d) CO. Engines of a type or model for which the date of manufacture was on or after July 18, 2012, may not have a characteristic level for CO exceeding the following emission standard in g/kN rated output:

CO = 4550�rPR ^?1.03

(e) NO Engines of a type or model for which the date of manufacture was on or after July 18, 2012, may not have a characteristic level for NO _X engines exceeding the following emission standard in g/kN rated output:

NO _X = 36+2.42�rPR

[87 FR 72351, Nov. 23, 2022]