scope:

Description of Driving Event:

The H70-0743 sling assembly consists of a forward and aft spreader beam assembly connected together by a segmented stabilizing frame assembly. With the two mobile crane concept, the sling assembly is used to lift and demate the orbiter to the shuttle carrier aircraft. At the contingency landing site, the two mobile crane concept is used with a 800-ton T-C 4000 truck crane for the aft lift and a 250-ton link belt for the forward lift. Visual observation must be maintained at all times during hoisting operations due to extremely limited clearances between the orbiter and facilities.