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PRATT & WHITNEY PW4084 ENGINE SUCCESSFULLY COMPLETES KEY FAA CERTIFICATION TESTS

 EAST HARTFORD, Conn., Nov. 18 /PRNewswire/ -- Pratt & Whitney's new PW4084 engine, the latest and highest-thrust member of the PW4000 family, has successfully completed four key tests required for certification of the engine by the Federal Aviation Administration (FAA), scheduled for April, 1994, Pratt & Whitney officials said today.
 The four tests include water ingestion -- to demonstrate safe operation during severe storm conditions; ice ingestion -- to demonstrate the engine's ability to absorb large slabs of ice; bird ingestion -- to demonstrate continued safe operation following the impact of a very large bird; and finally, altitude testing -- to demonstrate engine operability during transient conditions.
 "With the successful completion of these tests, the PW4084 program continues to move forward on schedule," said Ed Crow, Pratt & Whitney's senior vice president for Large Commercial Engines. "We are very pleased with the progress of this engine program."
 The water ingestion test demonstrated safe and reliable operation of the engine under extreme weather conditions. FAA regulations require operations under conditions that simulate a rainfall rate of 20 inches per hour, equivalent to the most severe sr?m that would be encountered during 100 million flights.
 The PW4084 exceeded the FAA requirements by 40 percent, demonstrating safe and reliable operation during a rainfall rate of 28 inches per hour. This represents the most severe storm that could be expected during one billion flights, according to Pratt & Whitney engineers.
 The ice slab ingestion test is required to demonstrate the engine's ability to swallow very large ice slabs that might build up and shed from an engine inlet cowling in a case where the anti-ice system was not activated. After the ingestion of the ice, the PW4084 continued to operate safely with no loss of power. Damage was minor and the engine could have continued in service operation with no maintenance action.
 The large bird ingestion test is required to demonstrate safe engine shut-down after the impact of an eight-pound bird. The PW4084 fan sustained only minimal damage when an eight-pound wild turkey was ingested during the test. Two blades had small dents and a third showed very slight evidence of the impact.
 The fan was capable of safe and continued operation at close to full power after the event, exceeding the FAA certification requirement for a safe engine shut down.
 Altitude operability testing is required to demonstrate safe and dependable operation during unexpected transient conditions. The PW4084 was put through a variety of rapid throttle excursions while at simulated altitude conditions at the Arnold Engineering Development Center. The engine performed flawlessly throughout these tests and demonstrated the ability to operate under transient conditions at up to 35,000 feet of altitude.
 Pratt & Whitney is a unit of United Technologies Corporation (NYSE: UTX), based in Hartford, Conn., U.S.A.
 -0- 11/18/93
 /CONTACT: Kathleen Palm of Pratt & Whitney, 203-565-3239/
 (UTX)


CO: Pratt & Whitney; United Technologies Corporation ST: Connecticut IN: ARO SU:

CM-JL -- NE005 -- 6062 11/18/93 13:02 EST
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Publication:PR Newswire
Date:Nov 18, 1993
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