REG NASA-LLIS-0106-1992 Lessons Learned - Radiographic Inspections.pdf

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1、Lessons Learned Entry: 0106Lesson Info:a71 Lesson Number: 0106a71 Lesson Date: 1992-08-18a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Radiographic Inspections Description of Driving Event: Technicians were performing radiographic inspection of the insulation area in the

2、 atlas stage thrust section utilizing a 100KV machine. The tubehead was placed inside the thrust area taped into position and exposures were made to the outside. The tape failed to hold the tubehead and it slipped down 6-8 inches hitting a threaded area on a strut. There was only visible damage to t

3、he top of 2-3 threads.Lesson(s) Learned: Heat from hot weather caused the tape used to secure a tubehead assembly to soften allowing the tubehead to fall, resulting in a “close call“.Recommendation(s): Update documentation to require technicians to use rope, web straps or something of that nature in

4、 addition to tape to secure the tubehead assembly.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): N/AAdditional Key Phrase(s): a71 Ground Operationsa71 Ground EquipmentAdditional 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-,-,-