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NASA-LLIS-0056 : Lessons Learned - Inadvertent Quick Disconnect (Q.D.) Nipple Separation
سازمان: NASA - National Aeronautics and Space Administration (NASA)
کلید واژه: Energetic Materials - Explosive/Propellant/Pyrotechnic , Flight Equipment , Ground Equipment , Ground Operations , Launch Process , Launch Vehicle , Packaging Handling Storage , Parts Materials & Processes
سال: 1992
زبان: English
قیمت: 290000 تومان
Description of Driving Event:
During hydrazine servicing of the left hand SRB tilt system, the fill/drain quick disconnect (Q.D.) nipple separated during cap removal, allowing the entire 3 1/2 gallon load to drain onto the MLP deck. The Q.D. nipple separation occurred because of nipple to cap thread seizure, caused by pressure build-up between the Q.D. and cap. Current design allows the possibility of Q.D. nipple removal while trying to remove Q.D. cap. The technician had no visual clue that the nipple was turning because of the scupper installation. The technician was drenched with hydrazine during the incident.
NASA-LLIS-0056 : Lessons Learned - Inadvertent Quick Disconnect (Q.D.) Nipple Separation
سازمان: NASA - National Aeronautics and Space Administration (NASA)
کلید واژه: Energetic Materials - Explosive/Propellant/Pyrotechnic , Flight Equipment , Ground Equipment , Ground Operations , Launch Process , Launch Vehicle , Packaging Handling Storage , Parts Materials & Processes
سال: 1992
زبان: English
قیمت: 290000 تومان
Description of Driving Event:
During hydrazine servicing of the left hand SRB tilt system, the fill/drain quick disconnect (Q.D.) nipple separated during cap removal, allowing the entire 3 1/2 gallon load to drain onto the MLP deck. The Q.D. nipple separation occurred because of nipple to cap thread seizure, caused by pressure build-up between the Q.D. and cap. Current design allows the possibility of Q.D. nipple removal while trying to remove Q.D. cap. The technician had no visual clue that the nipple was turning because of the scupper installation. The technician was drenched with hydrazine during the incident.