C1-2012-13828. Control of Air Pollution From Aircraft and Aircraft Engines; Emission Standards and Test Procedures

Correction

In rule document 2012-13828 appearing on pages 36341-36386 in the issue of Monday, June 18, 2012, make the following corrections:

§ 87.23

[Corrected]

1. On page 36382, in § 87.23, the table titled “Table 3 to § 87.23—Tier 6 NO_X Standards for New Subsonic Turbofan or Turbojet Engines with Rated Output Above 26.7 kN” should read as set forth below:

Table 3 to § 87.23—Tier 6 NO_X Standards for New Subsonic Turbofan or Turbojet Engines With Rated Output Above 26.7 kN

If the rated pressure ratio is—	and the rated output (in kN) is—	The NOX emission standard (in g/kN rated output) is—
rPR ≤ 30	26.7 < rO ≤ 89	38.5486 + 1.6823·rPR - 0.2453·rO − 0.00308·rPR·rO
	rO > 89	16.72 + 1.4080·rPR
30 < rPR < 82.6	26.7 < rO ≤ 89	46.1600 + 1.4286·rPR − 0.5303·rO + 0.00642·rPR·rO
	rO > 89	−1.04 + 2.0·rPR
rPR ≥ 82.6	all	32 + 1.6·rPR

2. On page 36383, in § 87.23, the table titled “Table 4 to § 87.23—Tier 8 NO_X Standards for New Subsonic Turbofan or Turbojet Engines with Rated Output Above 26.7 kN” should read as set forth below:

Table 4 to § 87.23—Tier 8 NO_X Standards for New Subsonic Turbofan or Turbojet Engines With Rated Output Above 26.7 kN

If the rated pressure ratio is—	and the rated output (in kN) is—	The NOX emission standard (in g/kN rated output) is—
rPR ≤ 30	26.7 < rO ≤ 89	40.052 + 1.5681·rPR − 0.3615·rO - 0.0018·rPR·rO
	rO > 89	7.88 + 1.4080·rPR
30 < rPR < 104.7	26.7 < rO ≤ 89	41.9435 + 1.505·rPR − 0.5823·rO + 0.005562·rPR·rO
	rO > 89	−9.88 + 2.0·rPR
rPR ≥ 104.7	all	32 + 1.6·rPR