Spacewalkers Robert Satcher Jr. and Randy Bresnik have completed a series of tasks. Together, they removed a pair of micrometeoroid and orbital debris shields from the Quest airlock and strapped them to the External Stowage Platform #2, then Bresnik moved an articulating foot restraint to the airlock. Next, Satcher released a bolt on a starboard truss ammonia tank assembly (ATA) in preparation for an STS-131 spacewalk that will replace the ATA. The ammonia in the tanks helps keep the space station properly cooled.
At an elapsed time of four hours, Bresnik is installing fluid jumpers on the Port 1/Port 3 and Starboard 1/Starboard 3 trusses and Satcher is at the mobile base system where he will install an insulating sleeve over power connections and two camera covers.