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  • Joe Breitfeller

Pratt & Whitney’s PW4000-94 Engine Marks 35 Years and Milestone 150 Million Flight Hours

Updated: Dec 20, 2022

Pratt & Whitney has today announced that their PW4000-94-inch engine has surpassed a landmark 150 million flight hours in 35 years of operational experience. The Engines power Boeing 747s, 767s and MD-11s, as well as Airbus A300 and A310 Family aircraft.

Pratt & Whitney PW4000-94-inch Engine Powered MD-11 - Courtesy Pratt & Whitney

On Monday (December 17, 2022), Pratt & Whitney announced that their PW4000-94-inch engine has reached a milestone 150 million flights hours since entering service in 1987. Over the last 35 years, more than 2,500 engines have been delivered, and are currently in service with over 70 customers in 30 countries. The PW4000-94 powers Boeing 767, 747s and MD-11s, as well as Airbus A300/310 Family and KC-46A aircraft across passenger, cargo and military missions. The 94-inch engine was the first model in Pratt & Whitney’s high-thrust family for large aircraft, offering between 52,000 and 62,000 pounds of thrust. Currently, over 55 percent of the engine fleet is in service within the cargo industry.

In Monday’s announcement, Pratt & Whitney’s Vice President – Operational Commercial Engines, Bernie Zimmerman, said,

“This milestone is a testament to the PW4000-94-inch engine’s legacy of reliability and performance. The 94-inch offers excellent operational flexibility and fuel economy and lower noise versus the competing engine. It’s an engine that’s been proven on a variety of applications — passenger, cargo, and military.”

The PW4000-94 engine joined United Airlines’ fleet of Boeing 747-400s in 1989, as well as the carrier’s Boeing 767-300s beginning in 1989, ultimately powering a total of 81 aircraft.

Also commenting on the PW4000-94’s milestone 150 million flight hours, United Airlines’ Vice President of Technical Services, John Wiitala, added,

“United has appreciated the reliability, great fuel economy and low maintenance costs of these engines. It’s no surprise that these Pratt & Whitney engines have served United and our customers well for 33 years and counting.”

Pratt & Whitney’s PW4000 Family of engines are backed by an established global MRO network. The company offers a range of engine maintenance and support options ranging from new and serviceable material programs, Life Limited Parts (LLPs) and part repairs, to engine overhauls. Customers are also supported through both on-wing and off-wing maintenance services, with a range of work scopes and payment plans, including long-term agreements, fixed price services and transactional solutions.

Cutaway of Pratt & Whitney's PW4000 94-Inch Fan Engine - Courtesy Pratt & Whitney

A division of Raytheon Technologies Corporation (NYSE: RTX), Pratt & Whitney is a global leader in the design, manufacture and service of aircraft and helicopter engines and auxiliary power units (APUs) for commercial, military, regional, business and general aviation aircraft. Pratt & Whitney is known for their innovative technologies such as the Geared Turbofan (GTF) commercial aircraft engine and the PW800 business jet engine.

Source: Pratt & Whitney

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