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What Are Reference Day Conditions? A Legal Overview
Definition & Meaning
The term "reference day conditions" refers to specific environmental parameters used to standardize measurements of gaseous emissions, such as hydrocarbons (HC) and smoke, from turbine engine-powered airplanes. These conditions are essential for ensuring that emissions data is consistent and comparable across different tests and evaluations.
According to federal aviation regulations, reference day conditions include:
Temperature: 15 degrees Celsius
Specific humidity: 0.00629 kg of water vapor per kg of dry air
Pressure: 101,325 pascals
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Legal Use & context
Reference day conditions are primarily used in the aviation industry, particularly in the context of environmental compliance and emissions testing. These conditions help regulatory bodies, such as the Federal Aviation Administration (FAA), ensure that aircraft meet established emissions standards. Legal practitioners in environmental law and aviation law may encounter this term when dealing with regulations related to air quality and emissions control.
Key legal elements
Real-world examples
Here are a couple of examples of abatement:
For instance, an aircraft manufacturer may conduct emissions testing under reference day conditions to demonstrate compliance with FAA regulations. This testing ensures that the aircraft's emissions are within the acceptable limits set by law.
(Hypothetical example) A new model of a commercial jet is tested for emissions on a day with a temperature of 15 degrees Celsius, specific humidity of 0.00629 kg H2O/kg of dry air, and atmospheric pressure of 101,325 Pa to verify its compliance with environmental standards.
Relevant laws & statutes
The primary regulation governing reference day conditions is found in Title 14 of the Code of Federal Regulations (CFR), specifically 14 CFR 34.1, which outlines the fuel venting and exhaust emission requirements for turbine engine-powered airplanes.
Comparison with related terms
Term
Definition
Differences
Standard Conditions
General conditions used for various scientific measurements.
Reference day conditions are specific to aviation emissions testing.
Ambient Conditions
The surrounding environmental conditions at a given time.
Reference day conditions are a fixed set of parameters for standardization.
Common misunderstandings
What to do if this term applies to you
If you are involved in aviation emissions testing or compliance, it's crucial to understand reference day conditions. Ensure that your testing aligns with these standards to meet regulatory requirements. For those needing assistance, consider exploring US Legal Forms' templates for aviation compliance documentation, or consult a legal professional for tailored advice.
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