Regulations last checked for updates: Apr 28, 2024

Title 40 - Protection of Environment last revised: Jun 26, 2024
All TitlesTitle 40Chapter IPart 87 - PART 87—CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES
View all text of Part 87 [§ 87.1 - § 87.60]
§ 87.21 - Exhaust emission standards for Tier 4 and earlier engines.

Exhaust emission standards apply to new aircraft engines as described in 40 CFR 1031.40 through 1031.90.

authority: 42 U.S.C. 7401
source: 87 FR 72350, Nov. 23, 2022, unless otherwise noted.
cite as: 40 CFR 87.21
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