1、Lessons Learned Entry: 0555Lesson Info:a71 Lesson Number: 0555a71 Lesson Date: 1997-06-17a71 Submitting Organization: JSCa71 Submitted by: L. UnderwoodSubject: Breathing air system/CO2 wash out Description of Driving Event: During an Extravehicular activity training exercise involving pressurized op
2、erations in a Extravehicular Mobility Unit, the subject suffered symptoms of high concentrations of CO2. The primary cause of the physiological symptoms experienced in the training exercise was insufficient air flow to remove carbon dioxide from the facial area of the helmet in the space suit.Lesson
3、(s) Learned: Significant air flow is required to adequately wash out the CO2 in a space suit.Recommendation(s): Determine flow requirements for adequate CO2 wash out for space suit operations. Have warning systems for low flow conditions. Develop detailed control procedures and provide training and
4、certification for breathing air console operators.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): N/AAdditional Info: Approval Info: a71 Approval Date: 1997-06-19a71 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-,-,-
