FAA Aircraft Noise Abatement Programs and Rules

Aircraft noise abatement programs represent one of the FAA's most consequential areas of community-facing regulation, affecting millions of residents living near the more than 500 commercial service airports operating across the United States. This page covers the definition and regulatory scope of noise abatement rules, the operational mechanisms through which they function, the common scenarios where they apply, and the decision boundaries that separate FAA-controlled noise policy from local airport authority. Understanding these programs is essential for airport operators, airlines, pilots, and communities navigating the intersection of aviation operations and residential land use.

Definition and scope

FAA noise abatement programs are the body of federal rules, operational procedures, and funding mechanisms designed to reduce aviation-generated noise impacts on communities surrounding airports. The statutory foundation rests primarily on the Aviation Safety and Noise Abatement Act of 1979 (ASNA) and the Airport Noise and Capacity Act of 1990 (ANCA), codified at 49 U.S.C. §§ 47521–47534. ANCA established the federal framework for phasing out noisier aircraft and set the conditions under which airports may impose operational restrictions.

The FAA's regulatory authority in this domain is expressed through two primary sets of rules:

• 14 CFR Part 36 — Aircraft Noise Standards, which set maximum noise certification levels for civil aircraft measured in Effective Perceived Noise Decibels (EPNdB) across takeoff, approach, and lateral measurement points.
• 14 CFR Part 150 — Airport Noise Compatibility Planning, which governs the voluntary noise compatibility planning process that airports use to identify noise-affected areas and implement mitigation strategies.

Aircraft are classified by Stage ratings — Stage 2, Stage 3, and Stage 4 — where Stage 4 aircraft meet the most stringent noise limits. Stage 2 aircraft (generally older, louder jets) were prohibited from operating at U.S. airports after December 31, 1999, under 14 CFR Part 91. Stage 3 aircraft have dominated the commercial fleet for decades; Stage 4 certification requirements, aligned with the International Civil Aviation Organization (ICAO) Chapter 4 standards, introduced cumulative noise limits that are 10 EPNdB below Stage 3 thresholds across the three measurement points combined.

The FAA's noise programs also interact with the FAA Airport Improvement Program (AIP), which allocates federal grant funds for noise-related projects including soundproofing, land acquisition, and runway modifications. An overview of the full scope of FAA regulatory authority appears at Key Dimensions and Scopes of the FAA.

How it works

The Part 150 process is the primary mechanism through which airports engage with the FAA on structured noise management. Participation is voluntary, but airports that complete the process gain access to AIP noise compatibility funding and a degree of federal endorsement for their operational procedures.

The Part 150 process operates in two phases:

1. Noise Exposure Map (NEM) — The airport operator develops maps showing existing and future noise contours, typically using the FAA's Aviation Environmental Design Tool (AEDT). Noise contours are drawn at the Day-Night Average Sound Level (DNL) of 65 dB, the federal threshold above which land use is considered incompatible with residential development.
2. Noise Compatibility Program (NCP) — Based on the NEM, the airport proposes measures to reduce noise impact. The FAA reviews and approves or disapproves each proposed measure within 180 days of submission.

At the operational level, pilots and air traffic controllers implement noise abatement departure and arrival procedures at specific airports. These include:

• Noise Abatement Departure Profile (NADP) 1 — Close-in noise reduction, used where communities immediately adjacent to the airport are the primary concern; requires thrust reduction closer to the departure end of the runway.
• NADP 2 — Distant noise reduction, used where noise-sensitive areas are farther from the airport; power reduction occurs at a higher altitude.

The FAA publishes approved noise abatement procedures through airport-specific instrument approach and departure charts and through Notices to Airmen (NOTAMs), which can reflect temporary procedure changes.

Common scenarios

Noise abatement rules surface in three recurring operational contexts:

Curfews and operational restrictions. Under ANCA, airports may restrict or prohibit Stage 2 aircraft operations if restrictions were in place before October 1, 1990. New restrictions on Stage 3 and Stage 4 aircraft require FAA approval under a stringent cost-benefit standard. Los Angeles International Airport (LAX) and John F. Kennedy International Airport (JFK) maintain FAA-approved nighttime operational restrictions affecting aircraft below Stage 3 certification.

Land use compatibility programs. When a Part 150 NEM identifies residential areas within the 65 DNL contour, airports typically pursue sound insulation programs. Residential properties within the 65 DNL boundary qualify for AIP-funded acoustic treatment, which can include window replacement, insulation upgrades, and HVAC modifications.

Preferential runway systems. Major airports implement preferential runway use programs that route departures and arrivals over less noise-sensitive areas. These programs are coordinated between the airport authority and FAA Air Traffic Control, and they reflect the operational realities described in the FAA Air Traffic Control System framework.

Decision boundaries

A critical structural distinction governs the entire noise abatement domain: the FAA controls airspace and aircraft operations, while airport operators and local governments control land use. The U.S. Supreme Court affirmed in City of Burbank v. Lockheed Air Terminal (1973) that federal law preempts local airport noise ordinances that attempt to regulate aircraft flight operations — reserving that authority exclusively to the FAA.

The boundaries operate as follows:

Airports acting outside these boundaries — for example, attempting to unilaterally ground a specific aircraft type without FAA approval — risk preemption challenges under ANCA and loss of AIP grant eligibility. The FAA's enforcement actions authority extends to violations of noise certification requirements, including the operation of non-compliant aircraft at U.S. airports.

FAA waivers from noise standards are addressed through a separate process under 14 CFR Part 91 and FAA waivers and exemptions, and operators must demonstrate extraordinary circumstances before relief from Part 36 noise limits is granted.

The complete regulatory map for noise abatement sits within the broader structure addressed on the FAA overview, which covers all major domains of FAA jurisdiction.