The New York company said the award from the U.S. Army Contracting Command -- Redstone, on behalf of the U.S. Army Aviation and Missile Life Cycle Management Command has a 1-year period of performance with four one-year options.
If all options are exercised, the contract's total value would be an estimated $1.98 billion.
"We are proud that L-3 has been selected as the Fort Rucker aircraft maintenance contractor," said John McNellis, president of L-3 Integrated Systems Group.
"We have worked closely with our government partners, as well as with our dedicated Army Fleet Support workforce, to continually deliver excellent, best-value performance in support of our military aviators and their training mission.
"This award is a very important one for our business, especially in this current environment, and we remain focused on our commitment to operational readiness and the high-quality services that we have provided the Army and Air Force at Fort Rucker since 2003."
L-3 said that under the arrangement, it will provide maintenance, logistics and related sustainment support for more than 600 helicopters.