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PRESS RELEASE

Pratt & Whitney Delivers First F135 Engine for Low Rate Initial Production Lot 3

EAST HARTFORD, Conn., Friday, May 6, 2011

Pratt & Whitney has delivered the first F135 engine for low rate initial production (LRIP) 3 to the U.S. Government for the F-35 Lightning II program. F135 engines in LRIP 3 meet established affordability targets and include engine modifications and improvements based on findings from the F-35 flight test program. Pratt & Whitney is a United Technologies Corp. (NYSE: UTX) company.

"Delivery of our 21st production engine is a significant milestone for the F-35 program, as we continue to deliver a more mature and capable F135 engine to meet the evolving needs of the war fighter," said Bennett Croswell, vice president, F135/F119 Engine Programs. "In doing so, we continue reducing costs to produce a more affordable and reliable product for our customers."

As part of LRIP 3, Pratt & Whitney will begin delivery of F135 engines to all three branches of the U.S. Armed Forces, as well as F-35 partner countries the United Kingdom and The Netherlands. Pratt & Whitney has delivered all 20 of the F135 engines in LRIP 1 and 2.

Pratt & Whitney has designed, developed and tested the F135 to deliver the most advanced fifth-generation fighter engine for the United States and its allies around the world. The F135 is the only engine powering the F-35 test program with more than 88 flawless vertical landings, 845 flight tests and 1,200 flight hours.

Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines, space propulsion systems and industrial gas turbines. United Technologies, based in Hartford, Conn., is a diversified company providing high technology products and services to the global aerospace and building industries.

This press release contains forward-looking statements concerning future business opportunities. Actual results may differ materially from those projected as a result of certain risks and uncertainties, including but not limited to changes in the U.S. Government funding related to the F-35 and F135 programs, changes in government procurement priorities and practices or in the number of aircraft to be built; challenges in the design, development, production and support of technologies; as well as other risks and uncertainties, including but not limited to those detailed from time to time in United Technologies Corporation's Securities and Exchange Commission filings.

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