Pratt & Whitney Rocketdyne's Space Shuttle Main Engines Launch Astronauts for Hubble...

Pratt & Whitney Rocketdyne's Space Shuttle Main Engines Launch Astronauts for
Hubble Space Telescope Servicing Mission

CANOGA PARK, Calif., May 11 /PRNewswire-FirstCall/ -- Pratt & Whitney
Rocketdyne (PWR) once again is helping to push the boundaries of how far
humanity can see into the depths of space. Three PWR Space Shuttle Main
Engines (SSMEs) launched astronauts aboard the Space Shuttle Atlantis today
from NASA's Kennedy Space Center on mission STS-125 to service the Hubble
Space Telescope. STS-125 is the fifth and final servicing mission to the
Hubble. Pratt & Whitney Rocketdyne is a United Technologies Corp. (NYSE: UTX)
company.

"We are incredibly proud to be part of this milestone mission both for Space
Shuttle Atlantis and for the remarkable Hubble, whose discoveries have forever
changed our knowledge of the universe," said Jim Paulsen, SSME program
manager, Pratt & Whitney Rocketdyne.

Atlantis is carrying two new instruments to the Hubble, in addition to a
replacement targeting camera, six new gyroscopes, and batteries to allow the
telescope to continue to function through 2013. Astronauts will also install a
new thermal blanket layer to provide improved insulation, and a mechanism to
help in the safe de-orbiting of the spacecraft by an unmanned spacecraft at
the end of its operational lifespan.

STS-125 marks the 30th flight of Space Shuttle Atlantis, the last planned
manned mission to the space telescope, and the final flight of a space shuttle
not related to the assembly of the International Space Station. PWR also
powered Hubble's previous servicing missions: STS-61, STS-82, STS-103 and
STS-109

Pratt & Whitney Rocketdyne, Inc., a part of Pratt & Whitney, is a preferred
provider of high-value propulsion, power, energy and innovative system
solutions used in a wide variety of government and commercial applications,
including the main engines for the space shuttle, Atlas and Delta launch
vehicles, missile defense systems and advanced hypersonic engines.

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 commercial
building industries.

SOURCE Pratt & Whitney Rocketdyne

Bryan Kidder, +1-818-586-2213, bryan.kidder@pwr.utc.com, or Carri Karuhn,
+1-818-586-4963, carri.karuhn@pwr.utc.com, both of Pratt & Whitney Rocketdyne