EAST HARTFORD, Conn., March 5 /PRNewswire-FirstCall/ — Pratt & Whitney has achieved initial service release (ISR) for the conventional take off and landing/carrier variant (CTOL/CV) F135 engine, marking another major milestone as the engine is cleared for operational use in the Lockheed Martin F-35 stealth fighter. Pratt & Whitney is a United Technologies Corp. (NYSE: UTX) company.

“Achieving initial service release means the F135 CTOL/CV engine, with more than 13,000 test hours, has met all necessary requirements and proven the safety, reliability and performance of this product for operational use in the field,” said Warren Boley, Vice President of F135 Engine Programs. “I am so proud of the F135 CTOL/CV team and our partners at Hamilton Sundstrand, Lockheed Martin and the Joint Program Office for this great program accomplishment. We look forward to seeing the F135-powered Lightning II in operational flight.”

Pratt & Whitney has delivered 17 flight test engines, as well as the first production F135 engine, and expects to deliver the final short take off and vertical landing (STOVL) flight test engine early this year.

“The F135 CTOL/CV propulsion system has been certified for Low Rate Initial Production and flight operations,” said Rob Burnes, F-35 Joint Program Office, Propulsion Director. “I congratulate the entire F135 team on achieving this milestone.”

Pratt & Whitney has designed, developed and tested the F135 to deliver the most advanced fifth generation fighter engine for the U.S. Air Force, Marine Corps and Navy, as well as for eight international partner countries.  The F135 is derived from proven technology of the only operational fifth generation fighter engine, the Pratt & Whitney F119 that powers the F-22 with more than 275,000 operational flight hours.  It has been further enhanced with technologies developed in several Air Force and Navy technology programs.

The F135 propulsion system has proven it can meet diverse aircraft requirements, and the ground and flight test experience demonstrates the capability of the F135 engine for armed forces around the world.

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 and operational engine performance. Actual results may differ materially from those projected as a result of certain risks and uncertainties, including but not limited to changes in funding related to the F-35 aircraft and F135 engines, 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 advanced technologies; as well as other risks and uncertainties, including but not limited to those detailed from time to time in United Technologies Corp.’s Securities and Exchange Commission filings.