1、Public Lessons Learned Entry: 3036 Lesson Info: Lesson Number: 3036 Lesson Date: 2010-05-19 Submitting Organization: KSC Submitted by: Annette Pitt Subject: Ground Support Equipment (GSE) Maintenance Requirements Abstract: The use of time-cycle intervals (such as a 360-day interval) for equipment ma
2、intenance is more applicable to ground support equipment (GSE) components that degrade within a given interval than to Operations Maintenance Requirement Systems Document (OMRSD) File VI maintenance requirements. By tailoring the maintenance interval to the type of maintenance to be performed, maint
3、enance is more efficient and fewer due dates are missed. Description of Driving Event: Several GSE Safety Assurance Analysis (SAA) reviews indicated that updates to maintenance requirements were required. As a result, GSE Baseline 600.94 Hatch Support Validation, which applies to PMN A70-0962, was u
4、pdated. This update included a change in the maintenance schedule for the periodic load test of the lifting unit, G070-503982, from maintenance “before use” to maintenance at a 360-day time-cycle interval. With this change, the maintenance is now being monitored for completion within 360 days from i
5、ts last performance date. Although this maintenance was not completed by the due date for several units, this did not violate requirements because the GSE in question was out of service so that other maintenance could be performed. This suggests that there is no benefit in using a time-cycle interva
6、l to schedule maintenance of GSE when, in most cases, maintenance will not be performed within that interval for reasons such as equipment availability, scheduling, and time required. Lesson(s) Learned: A time-cycle interval appears to be better suited for situations where GSE components degrade wit
7、hin a given known interval and not for those where routine preventive maintenance is being performed. Recommendation(s): For routine preventive maintenance of GSE, maintenance intervals should be tailored to the type of maintenance to be performed. Evidence of Recurrence Control Effectiveness: N/A D
8、ocuments Related to Lesson: NSTS07700, Volume II, Book 2, Directive 52L Responsibilities for The Space Shuttle Operations and Maintenance Requirements and Specifications, and Operations and Maintenance Plan NSTS08171 Operations and Maintenance Requirements and Specifications Document (OMRSD) Mission
9、 Directorate(s): Space Operations Additional Key Phrase(s): 1.Ground processing and manifesting Additional Info: Project: Space Shuttle Program Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval Info: Approval Date: 2010-08-10 Approval Name: mbell Approval Organization: HQ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
