1、Lessons Learned Entry: 0010Lesson Info:a71 Lesson Number: 0010a71 Lesson Date: 1991-06-17a71 Submitting Organization: JSCa71 Submitted by: D. CarrollSubject: Repair of a Failed Component (Shuttle Orbiter General Purpose Computer Hardware Interface Soldered Pin) Before Investigation of the Cause of t
2、he Failure Description of Driving Event: A shuttle orbiter General Purpose Computer (GPC) at Input Output Port (IOP) No.2 was voted out of a set with other computers. The computers were exchanged and the computer connected at IOP No.2 also malfunctioned, indicating the problem was with the IOP. A pi
3、n solder joint was found to be fractured. The unit was repaired without investigating the cause of the joint failure. Rework procedures were revised to require an investigation of the cause of a failure before any attempt to repair the failed component.Lesson(s) Learned: Repairing a failed component
4、 (GPC IOP Soldered Pin) before investigating the cause of a failure can destroy evidence important to the investigation. This reduces the probability of implementing effective recurrence controls.Recommendation(s): Rework procedures were changed to provide an inspection of failed parts before attemp
5、ting repairs.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Exploration Systemsa71 Sciencea71 Space Operationsa71 Aeronautics ResearchAdditi
6、onal Key Phrase(s): a71 Computersa71 Ground Operationsa71 HardwareAdditional Info: Approval Info: a71 Approval Date: 1993-09-10a71 Approval Name: Ron Montaguea71 Approval Organization: JSC/NS3a71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
