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FAA grants exemption for Airbus A321XLR's Pratt & Whitney PW1100G engines

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FAA grants exemption for Airbus A321XLR's Pratt & Whitney PW1100G engines
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Simple Flying | Simple Flying

The Federal Aviation Administration (FAA) has granted an exemption for the Pratt & Whitney PW1100G engine variants that will power the Airbus A321XLR. This decision allows International Aero Engines (IAE), a consortium including Pratt & Whitney and MTU Aero Engines, to proceed with the certification of these engines for the A321XLR.

The exemption pertains to a specific regulation within the Code of Federal Regulations (CFR) concerning bird strikes. The rule requires that ingestion of small and medium birds under certain conditions should not cause more than a sustained 25-percent power or thrust loss. IAE argued that while this is an engine requirement, "the ultimate safety goal is defined in terms of aircraft hazardous conditions, instead of engine hazardous effects."

IAE also highlighted that the A320neo aircraft using these engines must comply with both FAA and European Union Aviation Safety Agency’s (EASA) standards. These standards outline minimum climb gradients in different configurations.

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IAE requested relief from bird ingestion regulations after demonstrating compliance with other safety requirements, claiming their level of safety exceeded regulatory intentions. EASA commented on the petition, emphasizing proper communication between engine and aircraft applicants during certification.

The FAA acknowledged technical comments but maintained that software programming logic in the FADEC remains part of engine design despite being controlled by aircraft systems. Therefore, an uninstalled engine must show compliance with specific regulations from which IAE sought relief.

The FAA cited public interest as a reason for granting the exemption, stating it would allow certification of "the most efficient" engine in its class and provide CO2 and performance improvements for single-aisle jets.

While EASA certified the A321XLR on July 19 with CFM International LEAP-1A engines, Airbus expects approval for PW1100G-powered versions sometime in 2024. Airbus delivered its first A321XLR to Iberia on October 30, marking its inaugural transatlantic flight on November 14.

In the U.S., American Airlines, JetBlue, and United Airlines have collectively ordered 113 A321XLRs. American Airlines anticipates receiving its first delivery in December.

Organizations Included in this History
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