1、Lessons Learned Entry: 0160Lesson Info:a71 Lesson Number: 0160a71 Lesson Date: 1992-10-14a71 Submitting Organization: KSCa71 Submitted by: Lisa L. MusgraveSubject: Payload Bay Access Bridge Bucket Description of Driving Event: The payload bay bridge hoist system is located in the orbiter processing
2、facility, and spans the length of the shuttle payload bay. The two bridges, mounted on platforms, move on rails. On each bridge are two movable trolleys, each providing a base for a suspended telescoping bucket hoist. Maneuvering to any point in the payload bay is possible with the three directions
3、of motion provided by the bridges, trolleys, and buckets. With no mechanical locking device to support the bucket load when cables are disconnected for inspection or replacement, a possibility exists for damage or injury.Lesson(s) Learned: A lack of mechanical stops/lock for payload bay access bridg
4、e buckets could result in damage/injury during maintenance/inspection.Recommendation(s): Provide a locking device to support the bucket load when the cables are disconnected during inspection and replacement.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproductio
5、n or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Facilitiesa71 Lifting Devicesa71 Risk Management/AssessmentAdditional Info: Approval Info: a71 Approval Date: 1994-06-06a71 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-,-,-
