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U.S. Department of Transportation
Federal Aviation
Administration
Advisory
Circular
Subject: FUEL VENTING AND EXHAUST
EMISSION REQUIREMENTS
FOR TURBINE ENGINE
POWERED AIRPLANES
Date: 06/27/03
Initiated by: AEE-300
AC No: 34–1B
Change:
1. PURPOSE The intent of this advisory Circular (AC) is to promote uniformity of implementation of the
emissions certification requirements of Part 34 of the Federal Aviation Regulations. FAR 34 is unusually
complex in that it must reflect the requirements of the Clean Air Act, Sections 232 and 233, the EPA, 40 CFR
Part 87 and ICAO Annex 16, Volume II, Second Edition, July 1993, as well the FAA’s mandated charter. This
advisory circular brings these seemingly disparate requirements together to provide a single source of
information and advice to individuals and agencies interested in FAR 34.
a. Contents
This revised Advisory Circular (AC) contains updated information, including anticipated adoption of ICAO
CAPE 4 post December 31, 2003 rules, describing the standards and requirements for aircraft fuel venting and
engine emission certification and presents explanatory and supplementary information, as necessary, to
identify acceptable means of compliance. The information contained in this document sets forth acceptable
means, but not the sole means, by which compliance may be shown with the requirements of Federal Aviation
Regulations (FAR) Part 34 of the United States Code of Federal Regulations (CFR) Title 14. The regulation
that this AC references is 14 CFR Part 34 and its Amendments (hereinafter referred to as “Part 34”).
Pursuant to the Clean Air Act (CAA), Sections 231 and 232, Part 34 necessarily must conform to
Environmental Protection Agency (EPA) Title 40, Part 87, “Control of Air Pollution From Aircraft and Aircraft
Engines; Emission Standards and Test Procedures”. Therefore any change in procedures, of a substantive
nature, must be discussed with, and approved by, the Administrator of the EPA. This is mentioned explicitly in
Part 34 and in this AC for those areas of particular concern. In addition, users of this AC, as well as Part 34,
must be aware of any changes to 40 CFR Part 87 which have not yet been included in either Part 34 or this
AC. In such instances the requirements described in these documents must defer to 40 CFR Part 87, unless
and until approval is obtained from the Administrator of the EPA.
b. Advisory Nature
Like other Federal Aviation Administration (FAA) advisory circulars, the language within this document is
intended to be permissive and advisory in nature, except for explanations of regulatory language that are
mandatory. In addition, the compliance methods chosen by the applicant are voluntary within the framework of
the regulation as written. Mandatory terms used in this AC, such as “must” and “shall”, are used only in the
sense of ensuring the applicability of these particular methods of compliance when the acceptable means of
compliance described herein are used. This AC does not change regulatory requirements and does not
authorize changes in, or deviations from, regulatory requirements.
c. Document Format
This AC contains a section-by-section review and explanation of 14 CFR Part 34. In order to assist the user,
each explanation is provided as a separate, sequentially numbered, paragraph. In general, each paragraph is
presented as follows in Figure 1:
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