1、Lessons Learned Entry: 0123Lesson Info:a71 Lesson Number: 0123a71 Lesson Date: 1992-08-19a71 Submitting Organization: KSCa71 Submitted by: Lisa L. MusgraveSubject: Loads Imposed on Stabilizing Frame During Mate/demate Operations Description of Driving Event: The H70-0743 sling assembly consists of a
2、 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 wi
3、th 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.Lesson(s) Learned: Excessive loads may be imposed on t
4、he stabilizing frame assembly while hoisting during mate/demate operations.Recommendation(s): Maintain crane lift cables vertical and sling assembly level to prevent excessive loads imposed on stabilizing frame center segment.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Less
5、on: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Mission Directorate(s): N/AAdditional Key Phrase(s): a71 Ground Operationsa71 Industrial Operationsa71 Lifting Devicesa71 TransportationAdditional Info: Approval Info: a71 Approval Date: 1994-06-02a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
