1、Lessons Learned Entry: 0181Lesson Info:a71 Lesson Number: 0181a71 Lesson Date: 1992-10-27a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Forward Reaction Control System (FRCS) Mezzanine Platform Description of Driving Event: The winches are used to lift and lower the FRCS
2、mezzanine access platforms at the 207 foot level of the RSS. Should they fail during retraction or extension operations, the platform could fall and breakaway from its hinge and wire rope tether, resulting in possible damage to the orbiter and/or injury to personnel. As an interim control, platforms
3、 are being tethered with a 1/2“ nylon rope during all lifting operations.Lesson(s) Learned: Lack of a breaking system on the winches used to lift the FRCS mezzanine platform could result in a mishap if a winch fails.Recommendation(s): Replace the existing winches with upgraded winches having disc br
4、akes.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Facilitiesa71 Groun
5、d Operationsa71 Ground Equipmenta71 HardwareAdditional 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-,-,-
