focused on the training mission and was redesignated the 1550th Combat Crew Training Wing. In 1991, as the Air Force abolished the MAJCON (four-digit) unit system, the wing was merged with the 92d Bombardment Wing and renamed the 542d Crew Training Wing. Along with the new name, the wing acquired three groups and assumed host responsibility for Kirtland from the 1606th Air Base Wing as it reorganized as a USAF Objective Wing. That same year it deployed aircrew, maintenance personnel and operations personnel to support Operation Desert Storm. Wing aircrews were responsible for the rescue of seven aircrew during the operation. It also deployed personnel to support Operation Provide Hope in Somalia. At the start of 1993, Kirtland Air Force Base transferred to Air Force Materiel Command, and the wing lost its responsibility to act as host together with two of its groups. With General Merrill McPeak's call to retain historic United States Air Force units on the active list, the 542d was inactivated on 1 April 1994, while the newly redesignated 58th Special Operations Wing took over its training mission. Logistics Operations The wing was again activated in 2005 as the 542d Combat Sustainment Wing as part of the Air Force Materiel Command Transformation project, which replaced the staff agencies at Air Logistics Centers with wings, groups, and squadrons. Its mission was to design, acquire, install, and sustain electronic warfare, avionics, support equipment, vehicles, missiles, automatic test systems and weapons. It was responsible for supply chain management for F-15, C-130 and C-5 aircraft and provided calibration standards and certification of Precision Measurement Laboratories worldwide. It was responsible for life-cycle management of over 800 systems valued at over $56 Billion. Its 542d Combat Sustainment Group supported assigned electronic warfare systems, the 642d Combat Sustainment Group supported assigned support equipment systems, the 752d Combat Sustainment Group supported assigned electronics systems, the 762d Combat Sustainment Group managed logistics support for all assigned systems, and its 782d Combat Sustainment Group supported assigned armament systems. the 742d Combat Sustainment Group supported precision measurement equipment worldwide. Lineage 92d Bombardment Wing Constituted as 92d Bombardment Wing (Heavy) on 25 October 1943 Activated on 1 November 1943 Redesignated 92d Combat Bombardment Wing, Heavy on 24 August 1944 Redesignated 92d Bombardment Wing, Heavy on 22 November 1944 Disbanded on 28 August 1945. Reconstituted on 31 July 1985 and redesignated 542d Combat Crew Training Wing Consolidated with 1550th Combat