posted 08-08-2017 09:00 AM            

As the IV crewmember my responsibilities are to make sure they've got everything prepared properly to go out the door and do their spacewalks...

In addition to that, I've trained to be the backup EVA, in case one of the two primary EVAs, Ross or Newman, was feeling sick for some reason, I've trained to go out there and be their backup. And I think that it's very unlikely that they'll be sick on the day they're supposed to do a spacewalk, but that training's been very valuable for me. I've learned what it is they're doing. I've been in their shoes.

posted 08-08-2017 10:01 PM            

• CDR Truly was EV-2 on STS-8
  
• CDR Young was EV-1 on STS-9
  
• PLT Shriver was EV-2 on STS-51C
  
• PLT Gregory was EV-2 on STS-51B
  
• PLT Sturckow was EV-3 on STS-88

posted 08-10-2017 11:40 AM            

Astronauts Richard M. (Mike) Mullane (with striped suit and PLSS) and Steven A. Hawley participate in and underwater simulation of a 41-D contingency extravehicular activity (EVA) in the Johnson Space Center's weightless environment training facility (WET-F). All Shuttle crews, many of which are not scheduled for definite EVAs, possess team members trained to perform in space certain tasks normally done remotely in the event of systems failures. Among those contingent tasks is the manual closing of the payload bay doors. Mullane and Hawley are two of three mission specialists assigned duty on the seven-day 41-D flight.

posted 02-27-2020 10:08 AM            

Astronauts James S. Voss and Jeffrey N. Williams appear to be saying 'goodbye' to a friend on the mid deck of the Space Shuttle Atlantis. Their 'friend' is one of the extravehicular mobility units (EMU) that was used on their shared, successful 6-hour, 44 minute space walk a little earlier.

posted 03-01-2020 04:25 PM            

An Unscheduled EVA results from unforeseen developments during a flight that lead to one or more EVAs being conducted for mission success. Since by definition, no procedures or timelines exist for any unscheduled EVA, this type is much more likely to require chamber or NBL runs. These would be used to verify procedures and timing before the EVA instructions were up-linked to the crew. Once the decision has been made to go EVA, an unscheduled EVA flight is supported exactly as a scheduled EVA flight.

Contingency EVA is similar to an unscheduled EVA flight in that it results from problems that occur during a flight. The difference is that the problems that could lead to such an EVA have been foreseen and detailed procedures already exist. Examples would be EVAs required to close a malfunctioning payload bay door or to jettison the Ku-Band antenna. All crews are trained in such contingency procedures in the NBL. Two EMUs and associated hardware and expendables sufficient to accomplish three two-man EVAs are manifested for all non-EVA flights for such contingencies. This is a Level II requirement that is imposed by NSTS 07700, Volume X. As with an unscheduled EVA, once the decision has been made by the Flight Director to go EVA, a contingency EVA flight is supported exactly as a scheduled EVA flight.

posted 03-01-2020 08:58 PM            

Unmanned extravehicular mobility unit (EMU) floats in front of open airlock hatch on middeck with continuous flow electrophoresis system (CFES) experiment appearing on port side wall and the treadmill on the middeck floor.

posted 03-02-2020 07:12 AM            

• STS-37 - the EVA to manually deploy Compton GRO's high-gain antenna was a contingency EVA since it was an eventuality the crew had trained for. Jerry Ross and Jay Apt just went out and did what they had practiced when it became clear it was necessary.

• STS 51-D - was an unscheduled EVA because attaching the "fly-swatter" to the RMS was never planned and procedures had to be rehearsed on the ground before being discussed with the crew. Jeff Hoffman and Dave Griggs had never prepared for that specific procedure.

posted 03-02-2020 08:48 PM            

Bruce McCandless and Kathryn Sullivan suited up in the airlock on STS-31 in case they were needed to fix a stuck solar array on the Hubble telescope. That sounds like it would have been a contingency EVA.