Contact: Michelle Stevenson
L-3 Avionics Systems
michelle.stevenson@L-3com.com
616-285-4239

GRAND RAPIDS, Mich., July 12, 2010 – L-3 Avionics Systems announced today that the new Trilogy™
ESI-2000 Electronic Standby Instrument with battery backup has been submitted to the Federal Aviation
Administration (FAA) for Technical Standard Order (TSO) approval. The ESI-2000 is an enhanced
version of L-3’s initial Trilogy ESI offering, the ESI-1000. The new battery version combines the safety
and precision of solid-state glass avionics with a minimum of one hour of backup power provided by an
integrated lithium-ion battery. Both the ESI-1000 and ESI-2000 were developed to Design Assurance
Level A, the highest safety standard acknowledged by the FAA. L-3 Avionics Systems expects
authorization and release of the company’s latest digital standby instrument in the summer of 2010.

“With its own internal power source, the Trilogy ESI-2000 design is even more versatile,” said Larry
Riddle, vice president of business development for L-3 Avionics Systems. “When primary systems falter,
the ESI-2000 gives fixed- and rotary-wing operators a reliable source of relevant flight data, even after a
complete power loss. The Level A design takes safety measures to the highest level and provides added
assurance in the cockpit.”

The Trilogy ESI-2000 is an advanced solid-state standby instrument that displays all the important cues in
an arrangement pilots can easily recognize. By combining attitude, altitude, airspeed and optional heading
data on one easy-to-read 3.7-inch digital screen, Trilogy simplifies the transition to standby flight
information and eliminates the need for multiple backup instruments. Such versatility saves weight, panel
space and precious seconds if the primary avionics become disabled.

An integrated air data computer, solid-state attitude sensors and an optional external magnetometer
insulate the ESI from external systems, allowing it to present precise flight information independently.
The unit’s four-button pilot interface, automatic brightness control and dimensions matching the standard
3-ATI mounting cutout make it easy to operate and install. Once activated, the ESI-2000 is typically
aligned and ready for flight in less than two minutes.

Other new enhancements available in both the ESI-1000 and ESI-2000 include an on-screen slip/skid
indicator, which helps pilots stay coordinated without referring to other instruments in a dark cockpit, and
a pop-up metric window, which facilitates quick altitude conversions during international flights.
Emergency operation of the Trilogy ESI is achieved through the use of high-energy density lithium-ion
technology. Favorable self-discharge characteristics allow the battery to maintain a charge over long
periods of disuse with little to no energy loss, while its excellent power-to-weight ratio provides high
output with minimal added mass. The ESI is expected to supply usable flight data for three to four hours
on battery power, depending on temperature exposure. Following emergency use, the battery is recharged
by the aircraft’s electrical system with no need for removal or inspection.

The Trilogy ESI was developed with L-3 Avionics Systems’ advanced solid-state expertise, which has
made the company a leader in electronic standby instrument systems for high-end aircraft. The Trilogy
instruments bring this expertise to the general aviation market.

L-3 Avionics Systems has been helping pilots fly for more than 45 years. The company provides a wide
array of avionics technologies designed to improve situational awareness and enhance safety, such as the
GH-3000 electronic and J.E.T.® standby instruments, the SkyWatch® Collision Avoidance System, the
Stormscope® Weather Mapping System and the Trilogy™ Electronic Standby Instrument, among others.
For more information, please visit the company’s website at www.L-3avionics.com.

Headquartered in New York City, L-3 Communications employs approximately 67,000 people worldwide
and is a prime contractor in C3ISR (Command, Control, Communications, Intelligence, Surveillance and
Reconnaissance) systems, aircraft modernization and maintenance and government services. L-3 is also a
leading provider of a broad range of electronic systems used on military and commercial platforms. The
company reported 2009 sales of $15.6 billion. To learn more about L-3, please visit the company’s
website at www.L-3com.com.

Except for historical information contained herein, the matters set forth in this news release are forwardlooking
statements. Statements that are predictive in nature, that depend upon or refer to events or
conditions or that include words such as “expects,” “anticipates,” “intends,” “plans,” “believes,”
“estimates,” “will,” “could” and similar expressions are forward-looking statements. The forward-looking
statements set forth above involve a number of risks and uncertainties that could cause actual results to
differ materially from any such statement, including the risks and uncertainties discussed in the
company’s Safe Harbor Compliance Statement for Forward-Looking Statements included in the
company’s recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange
Commission. The forward-looking statements speak only as of the date made, and the company
undertakes no obligation to update these forward-looking statements.

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