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Inside Delta TechOps’ Largest Engine Test Cell

Inside Delta TechOps’ Largest Engine Test Cell
A Landmark Facility in Atlanta
Atlanta is renowned for its impressive landmarks, from its sprawling airport to prestigious universities and the iconic Big Chicken. Yet, hidden within Delta TechOps lies another remarkable feat: the world’s largest production engine test cell. Airways recently toured this expansive facility with Duty Manager Mark Folsom, a former U.S. Marine and a 38-year veteran of Delta, who provided an in-depth look at its operations.
A detailed model of the test cell highlights the engine preparation area alongside a vast exhaust vent, while a familiar Delta sign—once displayed atop Turner Field—serves as a nod to the site’s deep Atlanta heritage.
Capabilities and Certification
Delta TechOps’ facility, together with test cells three and four, is certified to service nearly every commercial engine currently in operation. This includes legacy models from Pratt & Whitney, GE, and CFM. Significantly, it is the only North American maintenance, repair, and overhaul (MRO) provider certified to work on all three major next-generation engine platforms: Rolls-Royce Trent 1000, 7000, and XWB; Pratt & Whitney GTF PW1100 and GTF 1500; and CFM LEAP-1B and LEAP-1A. Outside the facility, dozens of engines await testing or repair, their covers color-coded to indicate engine type.
The decision to expand capabilities to service Rolls-Royce Trent engines in 2018 posed a considerable challenge. “We had to build a cell capable of handling those big engines,” Folsom explained. Existing test cells were limited to a maximum thrust of 70,000 pounds, insufficient for the larger Trent models and future engines. After securing necessary approvals, Delta broke ground and completed the new facility within 15 months.
A State-of-the-Art Testing Hub
Opened in 2019 at a cost of $65 million, the new test cell can accommodate engines producing up to 150,000 pounds of thrust. While Delta does not operate the Trent 1000 (used on the Boeing 787) or the GE90 (Boeing 777), the facility enables TechOps to provide services to third-party operators. Delta’s own Airbus A350 fleet utilizes the Rolls-Royce Trent XWB, which generates up to 97,000 pounds of thrust.
The facility is a hive of activity. “We're running around 700 engines a year through all of our test cells,” Folsom noted. “In this cell, where we test the Rolls-Royce Trent 1000, 7000, and XWB, the volume ranges from 70 to 90 engines annually. With the recent certification of the LEAP engine, we anticipate that number will grow.”
Engines are delivered by a dedicated move crew responsible exclusively for unloading, transporting, and reinstalling engines. The test crew then carefully positions each engine for adapter fitting and subsequent testing.
Navigating Industry Challenges
Delta TechOps is confronting rising demand for engine and component maintenance amid ongoing aircraft delivery delays and persistent supply chain disruptions—challenges mirrored by industry counterparts such as Turkish Technic. In response, Delta is leveraging its five-year sustainable aviation fuel contract with Shell to enhance its role in the evolving market for sustainable aviation solutions. Meanwhile, competitors like American Airlines are increasing flights to host cities ahead of the 2026 World Cup, reflecting a broader industry strategy to capitalize on major global events to drive traffic and revenue.
As the aviation sector continues to evolve, Delta TechOps’ cutting-edge test cell stands as both a testament to Atlanta’s industrial scale and a vital strategic asset in a rapidly transforming industry.

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