1、Lessons Learned Entry: 0554Lesson Info:a71 Lesson Number: 0554a71 Lesson Date: 1997-05-28a71 Submitting Organization: JSCa71 Submitted by: L. UnderwoodSubject: Recognizing and Controlling Thermal Hazards During Test Planning and Test Conduct Description of Driving Event: During a thermal vacuum test
2、 with a subject in a space suit, the test subject received frost bite on his finger tips, while handling EVA (Extravehicular Activity) tools at -120 degrees F. Under specific conditions the subject in the space suit gloves can be subjected to low temperatures. The Extravehicular tools required diffi
3、cult functional operation, resulting in extensive handling /contact time. The EVA tools had high thermal conductivity. The Space suit gloves have minimum insulation in the finger tip areas for increased touch and grasp capabilities.The ensuing investigation revealed that the test team had a low awar
4、eness that this hazard existed and that it needed to be controlled.Lesson(s) Learned: All potential hazards must be communicated to the test team (including the test subject) to enable them to identify and control the hazards.Recommendation(s): Conduct integrated hazard analysis for all of the test
5、systems and communicate this information to the test team for their awareness and control. EVA tools should be designed for low thermal conductivity to reduce the thermal hazard.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted with
6、out license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): N/AAdditional Info: Approval Info: a71 Approval Date: 1997-05-29a71 Approval Name: Ronald A. Montaguea71 Approval Organization: NA3a71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
