1、Lessons Learned Entry: 0091Lesson Info:a71 Lesson Number: 0091a71 Lesson Date: 1992-06-18a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: External Tank Electrical Components Description of Driving Event: Potential ignition of SRB due to possible arcing at switch or relay co
2、ntacts or at circuit connections due to inadvertent connection/misconnection, is controlled by design. Connections are connected within the intertank by electrical plugs and receptacles, which are secured by threaded sleeves. Power and return lines are not routed through adjacent pins on the same co
3、nnector. The connector dielectric is rated at 1000 VRMS at 60 Hz.Lesson(s) Learned: Inadvertent connection/disconnection of ET electrical components with power applied, could cause sparks, damaging flight hardware or injuring personnel.Recommendation(s): Verify and ensure all connectors meet MIL STD
4、 with shielded pins on male connectors to preclude personnel contact.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Mission Directorate(s): a71 Space Operationsa71 Expl
5、oration SystemsAdditional Key Phrase(s): a71 Energetic Materials - Explosive/Propellant/Pyrotechnica71 Flight Operationsa71 Flight Equipmenta71 Launch Processa71 Launch Vehiclea71 Parts Materials & Processesa71 Pressure VesselsAdditional 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-,-,-
