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National Aeronautics and Space Administration

EVA23Water Intrusion

Recommendation R-28:

The ISS Program should ensure that the EMU Requirements Evolution Book is routinely updated to capture the maturing design and design rationale of the EMU and include material originally intended for the placeholder sections in the 1994 version.


Recommendation R-29:

The ISS Program should ensure that the EVA community uses the EMU Requirements Evolution Book and the improved knowledge capture databases, once developed, to improve ground team training requirements throughout the EVA community for better depth of EMU system knowledge and attention to design and failure history.


Recommendation R-30:

The Agency, Centers, and Programs should improve requirements for root cause determination and subsequent training and provide the training for Engineering and Safety personnel to better ensure root cause determination of critical and reoccurring failures.


Recommendation R-31:

MOD should provide integrated EVA sims with the possibility of ending the sim early. These sims must be scheduled for the full duration, but allowed to end early if required by the actions taken by the flight control team. Additionally, airlock ingress and repress should be routinely included as part of simulations that involve terminating an EVA with an EMU in an off nominal configuration.


Recommendation R-32:

MOD should review all procedures with a “√ MCC” step and verify that rationale exists to explain the required actions to be taken by the flight control team if this step is reached.


Recommendation R-33:

The ISS Program should ensure appropriate connectivity between all relevant parties who participate in EVA activities to support real-time operations including talk/listen access to MCC Audio Loops.


Recommendation R-34:

MOD should strengthen training to emphasize the physiological effects of a rapid repress on the crew to aid in the decision making process in real-time.


Recommendation R-35:

The ISS Program and JSC EVA Office should improve technical and management coordination between their two organizations and ensure that all strategic and tactical decisions that are made by either organization are quickly and effectively understood, and officially accepted by both.


Recommendation R-36:

The government officials and contract managers must put in place expectations and create a board environment that allows the EVA contractors to freely challenge technical decisions made by the governing boards when appropriate and encourage proactive participation.



ISS EVA Suit Water Intrusion Mishap Investigation Report  

Report of the NASA Mishap Investigation Board examining the high visibility close call event of July 16, 2013 when ESA astronaut Luca Parmit...