1、Lessons Learned Entry: 0075Lesson Info:a71 Lesson Number: 0075a71 Lesson Date: 1992-05-02a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Breakout Boxes Description of Driving Event: Three breakout boxes were located on the orbiter aft compartment entrance platform. When tw
2、o technicians entered the aft compartment, these breakout boxes were knocked off of the platform, falling 7.5 feet and striking the space shuttle main engine (SSME) #1 AIR/GN2 purge line. This fiberglass line was cracked. In addition, the SSME #1 main fuel position actuator was damaged.Lesson(s) Lea
3、rned: The absence of tie-off points or protective holding areas for hand portable equipment resulted in damage when breakout boxes were knocked off a work platform.Recommendation(s): Install protective hold locations for all hand portable equipment and install eyelets on all hand portable equipment
4、for easy tethering.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-,-,-N/AAdditional Key Phrase(s): a71 Ground Operationsa71 Ground Equipmenta71 Hard
5、warea71 Launch Processa71 Launch Vehiclea71 Safety & Mission AssuranceAdditional 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-,-,-
