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Pratt & Whitney's F119 Engine Receives ISR Approval from USAF, Surpasses 4,000 Flight Hours, Demonstrates Unprecedented Reliability

EAST HARTFORD, Conn., September 16, 2002 – Pratt & Whitney's (P&W) F119-PW-100 engine powering the F/A-22 Raptor fighter aircraft has received Initial Service Release (ISR) approval from the U.S. Air Force, signifying that the engine is ready for operational service. At the same time, it has demonstrated unprecedented reliability in surpassing 4,000 flight test hours without a single in-flight shutdown or engine stall event - a feat that is unprecedented in a new production fighter engine.

To achieve ISR, the F119 successfully completed extensive component and engine testing, including accelerated mission testing, equivalent to six years of U.S. Air Force service. The rigorous testing programs demonstrated full life capability of the engine hot section, as well as full depot maintenance interval life on all other components. All results demonstrated that the engine meets the maintainability, performance, operability, and structural integrity requirements for which it was designed, including hazard testing to ensure robust tolerance to expected events that occur in an operational fighter program.

"We are pleased to grant ISR approval to the F119," said Brig. Gen. Mark D. Shackelford, F/A-22 System Program Office Director, U.S. Air Force. "The engine has performed superbly throughout flight test evaluations, meeting and or exceeding all expectations, and we look forward to its continued exceptional performance as the F119 transitions to an operational environment."

Shackelford added, "We also congratulate the Pratt & Whitney team on accumulating 4,000 engine flight test hours without a single hiccup. While our test pilots always praise the F119's power and performance, they also consistently refer to its reliability. In fact, they describe it as being 'boringly dependable,' and in their line of work that's the highest compliment you can give."

"Achievement of ISR certification is the culmination of the F119 Engineering and Manufacturing Development Program," said Bennett Croswell, P&W Director of F119 engine programs. "Throughout the program, the F119 has demonstrated a level of capability and maturity that is unprecedented for the introduction of a new fighter engine."

The F119 is currently halfway through its latest Accelerated Maturation Program (AMP) testing as part of the F119 Component Improvement Program. At its conclusion, the AMP will have simulated six to eight years of operational mission usage in the F/A-22 weapons system, as well as other strenuous conditions. "Our AMP testing is simulating an environment that is even more stringent than those met in earlier accelerated mission testing, and even worse than any anticipated in operation," said Croswell. "For example, we have increased the time at max turbine temperature, the number of augmentor lights and nozzle vector cycles, and the amount of engine imbalance beyond those anticipated in the field. Even in this rigorous environment, the F119 continues to exceed our expectations, demonstrating exceptional performance, operability, reliability and durability."

Two F119-PW-100 engines power the Lockheed Martin F/A-22 Raptor, the U.S. Air Force's new stealth fighter. The F119 is the most advanced fighter engine in production, featuring a unique thrust vectoring nozzle, integrated stealth characteristics, and the capability to supercruise, or achieve Mach 1.5 without afterburner. To date, 36 production configuration F119 engines have been delivered.

Pratt & Whitney, a United Technologies (NYSE:UTX) company, is a world leader in the design, manufacture and service of aircraft engines, space propulsion systems and industrial gas turbines.

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