The Boeing Co. [BA] delivered the final upgraded missile guidance set (MGS) for the Minuteman III intercontinental ballistic missile (ICBM) to the Air Force, completing 82 months — or nearly seven years — of consecutive on-time or early deliveries.

Boeing made the final delivery two months ahead of schedule. The milestone was highlighted at a Dec. 11 ceremony attended by representatives of the Air Force, Boeing and ICBM prime contractor Northrop Grumman Corp. [NOC].

Boeing performed the MGS upgrade under the ICBM Guidance Replacement Program (GRP), a modernization effort to replace and upgrade the 1970s-vintage navigational electronics in the Minuteman III. Boeing began production of the new electronic sets in 1998.

"The Boeing team has worked closely with the Air Force and Northrop Grumman to provide on-time delivery to the warfighter throughout the program," said Charles Dutch, Boeing GRP director. "Their efforts have extended the service life of the Minuteman III MGS through 2020."