Hamilton Sundstrand Systems Contributing to Successful Boeing 787 Flight Testing

FARNBOROUGH, England, July 19, 2010 - FARNBOROUGH AIR SHOW - Hamilton Sundstrand's Boeing 787 Dreamliner
systems are contributing to the aircraft's successful flight testing and are
ready to support the airplane's entry into service, which Boeing has slated
to occur in the fourth quarter. Hamilton Sundstrand is a subsidiary of United
Technologies Corp. (NYSE: UTX).

The 787 took its first flight from Paine Field in Everett, Wash., on Dec.
15, 2009. Since then the flight test program has undergone approximately
1,100 flight test hours.

"Hamilton Sundstrand is extremely proud of its role in the development of
the revolutionary Boeing 787 Dreamliner," said Hamilton Sundstrand President
Alain Bellemare. "Our systems are playing a key role in validating the
aircraft's capabilities as it approaches entry-into-service."

The 787 contains nine major Hamilton Sundstrand systems, comprising
nearly 600 components and subsystems that incorporate various unique
technologies for this first more-electric commercial transport.

In April, Boeing recognized Hamilton Sundstrand's Electric Systems
business as one of its suppliers of the year for the company's exceptional
commitment to excellence in working with Boeing. Hamilton Sundstrand was
recognized in the Pathfinder category for its commitment to the 787
Dreamliner program. The Pathfinder category recognizes suppliers that show
outstanding effort, meet or exceed Boeing expectations, and bring new
capability providing Boeing a competitive advantage.

Among the technical firsts for the more electric 787 is the Hamilton
Sundstrand Electric Power Generating and Start System (EPGSS), which supplies
nearly 1.5 megawatts of power, or enough to power about 400 homes, and more
than five times the electric power on a Boeing 767. The EPGSS comprises an
industry-unique electric start system. Hamilton Sundstrand's starter
generators provided the first electric start of a turbofan engine on a large
twin-aisle commercial jet transport.

The Hamilton Sundstrand APS 5000 Auxiliary Power Unit is Boeing's first
more-electric APU. In the engine start sequence, the 1,100 shaft horsepower
APU provides power to the engine-mounted Hamilton Sundstrand starter
generators to start the engines. Earlier this year, Hamilton Sundstrand's
Power Systems business successfully completed APS5000 APU ETOPS
(Extended-range Operations) testing — an important step in providing ETOPS
capabilities for 787s upon initial entry into service.

Another industry first, Hamilton Sundstrand's more electric 787
environmental control system significantly improves efficiency and fuel burn,
and is a source of cabin pressurization, which eliminates the need for bleed
air. The system enables lower cabin pressurization for improved passenger
comfort.

The Hamilton Sundstrand Nitrogen Generation System improves fuel system
safety by increasing the nitrogen concentration in the fuel tanks. The 787 is
the first passenger transport to integrate an NGS into the initial airplane
design.

Other significant Hamilton Sundstrand systems include the 787's primary
power distribution system and motor controls, secondary power distribution
systems, galley cooling system, electric-driven hydraulic pumps and emergency
power system. Hamilton Sundstrand's Kidde Aerospace & Defense subsidiary is
supplying Boeing with the complete fire protection systems package for the
787. Hamilton Sundstrand also provides the engine gearbox system for the
Rolls-Royce Trent 1000 engine.

In addition to its technical advances in hardware and software, Hamilton
Sundstrand has supported the 787 program with a substantial systems
integration effort for the various Hamilton Sundstrand systems. Hamilton
Sundstrand's scope of supply and its systems integration role are
unprecedented for an aerospace systems company.

Integral to that role is Hamilton Sundstrand's Airplane Power System
Integration Facility (APSIF), located at its facility in Rockford, Ill.,
which hosts equipment from Hamilton Sundstrand and nearly a dozen other
Boeing suppliers to develop, integrate and certify the more electric
technology of the 787. The APSIF contains nearly 400 pieces of equipment,
including the airplane's common core computing and remote data concentrator
network, the flight deck displays and the overhead switch panels.

The 787 program is expected to generate more than US$15 billion in
revenue for Hamilton Sundstrand over the life of the program.

With 2009 revenues of US$5.6 billion, Hamilton Sundstrand is
headquartered in Windsor Locks, Conn. Among the world's largest suppliers of
technologically advanced aerospace and industrial products, the company
designs, manufactures and services aerospace systems and provides integrated
system solutions for commercial, regional, corporate and military aircraft.
It also is a major supplier for international space programs.

United Technologies Corp., based in Hartford, Conn., is a diversified
company providing high technology products and services to the building and
aerospace industries worldwide.

This press release contains forward-looking statements concerning
potential production and sale of Hamilton Sundstrand aerospace products and
services. Important uncertainties that could cause actual results to differ
materially from those anticipated include the severity and duration of global
recessionary conditions, including extended contraction in credit conditions;
the impact of volatility and weakness in financial markets on overall levels
of economic activity; declines in end market demand in the aerospace
industry; financial difficulties, including bankruptcy, of commercial
airlines; 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
Corporation's Securities and Exchange Commission filings.

    Contact: Dan Coulom
             860-305-5471
             www.hamiltonsundstrand.com

             Chalet D14-16
             44 (0) 1252 418300 - Main
             44 (0) 1252 418302

Dan Coulom, +1-860-305-5471, www.hamiltonsundstrand.com; Chalet D14-16, +44-(0)-1252-418300 - Main, +44-(0)-1252-418302