The Federal Aviation Administration (FAA) requires aircraft engine manufacturers to perform tests as required in 14 CFR part 33 to demonstrate compliance with the FAA's certification requirements. These tests are typically performed in test cells, which are specialized facilities designed to measure the performance and emissions of aircraft engines. To ensure that the test results obtained in different test cells are comparable, the FAA requires that test cells be correlated to a master test cell. In this blog post, we will explore the concept of test cell correlation, its importance, and the process of obtaining FAA approval for test cell correlation.
Test cell correlation is the process of comparing the performance and emissions measurements obtained in one test cell to those obtained in a master test cell. The master test cell is a test facility that has been calibrated and verified to produce accurate and repeatable test results. The purpose of test cell correlation is to ensure that the measurements obtained in different test cells are comparable and accurate.
Why is Test Cell Correlation Important?
Test cell correlation is important because it ensures that the test results obtained in different test cells are accurate and comparable. This is essential for ensuring that aircraft engines meet the FAA's certification requirements and are safe and reliable for use in commercial aviation.
The Process of Obtaining FAA Approval for Test Cell Correlation:
The process of obtaining FAA approval for test cell correlation involves several steps. First, the engine manufacturer must select a master test cell that has been calibrated and verified to produce accurate and repeatable test results. The manufacturer must then perform tests in its own test cell and compare the results to those obtained in the master test cell.
If the results obtained in the reference's test cell are comparable to those obtained in the master test cell, the applicant may apply for FAA approval for test cell correlation. The applicant must submit data and documentation to demonstrate that its test cell has been correlated to the master test cell and that the test results obtained in its test cell are accurate and comparable to those obtained in the master test cell.
Once the FAA approves the test cell correlation, the applicant may use its own test cell to perform tests to demonstrate compliance with the FAA's certification requirements. However, the applicant must continue to perform periodic test cell correlation checks to ensure that its test results remain accurate and comparable to those obtained in the master test cell. Our list of reference documents gives insight into the extent of required documentation.
In conclusion, test cell correlation is a critical process for ensuring that aircraft engines meet the FAA's certification requirements and are safe and reliable for use in commercial aviation. By following the FAA's guidelines for test cell correlation and obtaining FAA approval for test cell correlation, engine manufacturers can demonstrate that their test results are accurate and comparable, which is essential for ensuring the safety and reliability of commercial aircraft engines. If you would like assistance with your test facility, contact us today.
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