1、Lessons Learned Entry: 0072Lesson Info:a71 Lesson Number: 0072a71 Lesson Date: 1992-04-28a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Lepel Brazing and Debrazing Equipment Description of Driving Event: During debrazing operations of a purge fitting in an orbiters aft co
2、mpartment, the debrazing head separated, causing an electrical arc. This arc caused the debrazing head to heat up, which caused cracking of the debrazing head and damage to the coil and purge fittings.Lesson(s) Learned: Lack of an open circuit shut off switch resulted with an electric arc cracking a
3、 debrazing head and damaging a coil and purge fittings.Recommendation(s): Develop and install a sensor that will detect open circuits and shut off the lepel brazing/debrazing machine when they occur.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(
4、s): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AAdditional Key Phrase(s): a71 Energya71 Flight Equipmenta71 Ground Operationsa71 Ground Equipmenta71 Hardwarea71 Parts Materials & ProcessesAdditional 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-,-,-
