As part of the re-planning for the mission, the crews set to work in the morning deploying the solar wings on the S6 truss.
To prepare for the extension of the arrays, the station was maneuvered into a position that allowed constant sunlight to hit the arrays, which allowed them to warm up and prevent what the mission team calls 'stiction', or a sticky friction that happens after the arrays have been in storage for an extended period of time.

The unfurling of the arrays started at 15:06 UTC, beginning with the channel 1B array.
Commanding the unit from the station, Philips paused at the halfway point, and allowed the array to rest in the sun for approximately 45 minutes, and then completed the extension.
After successfully extending the 1B array, the astronauts started the 3B array extension at 16:35 UTC.
The 3B array was expected to be more difficult to extend, as it had been packed in the blanket box for eight years.
As with the first, a pause at halfway was performed to allow the arrays to heat up in the sun.
While some stiction was seen, once the final extension began all the slats flattened out, and the arrays were fully deployed at 17:17 UTC.
The addition of the final set of solar panels brings the station's power output to 120 kilowatts, and doubles the scientific power to 30 kilowatts.
The station's surface area of the arrays is just under one acre, or 38,400 square feet.

Later in the day, Fincke, Lonchakov, Wakata and Magnus participated in a media event with Reuters, Voice of America, and the Pittsburgh Post-Gazette.

During the Mission Status briefing, Alibaruho expressed how pleased the teams on the ground were with the successful deployment of the arrays, and commended the crew on the deployment activities.
Mission Management Team Chairman LeRoy Cain noted that the team was working on a revised timetable to allow critical experiment samples to return to Earth safely.
The samples need to be kept in a cold environment, and in the event weather delayed the landing, the team evaluated the best way to preserve the samples.
The team approved a revised flight plan that allows Discovery to delay hatch closure and undocking slightly, to allow the samples to be kept inside the station's freezer longer, while still protecting the landing date of 28 March.
Instead of closing the hatch the night before undocking, the hatch would be closed on the same day, flight day eleven.

It was a truly fantastic day in space.
The International Space Station team and its partnerships are on cloud nine with the completion of the integrated truss assembly, as well as the finalization of our electrical power grid on the space station.
It took years to get here.
We had some struggles along the way, but it's a major accomplishment for NASA and the partnership team.

— Dan Hartman, Space Station Mission Management Team Chairman
As part of the re-planning for the mission, the crews set to work in the morning deploying the solar wings on the S6 truss. To prepare for the extension of the arrays, the station was maneuvered into a position that allowed constant sunlight to hit the arrays, which allowed them to warm up and prevent what the mission team calls 'stiction', or a sticky friction that happens after the arrays have been in storage for an extended period of time.
The unfurling of the arrays started at 15:06 UTC, beginning with the channel 1B array. Commanding the unit from the station, Philips paused at the halfway point, and allowed the array to rest in the sun for approximately 45 minutes, and then completed the extension. After successfully extending the 1B array, the astronauts started the 3B array extension at 16:35 UTC. The 3B array was expected to be more difficult to extend, as it had been packed in the blanket box for eight years. As with the first, a pause at halfway was performed to allow the arrays to heat up in the sun. While some stiction was seen, once the final extension began all the slats flattened out, and the arrays were fully deployed at 17:17 UTC. The addition of the final set of solar panels brings the station's power output to 120 kilowatts, and doubles the scientific power to 30 kilowatts. The station's surface area of the arrays is just under one acre, or 38,400 square feet.
Later in the day, Fincke, Lonchakov, Wakata and Magnus participated in a media event with Reuters, Voice of America, and the Pittsburgh Post-Gazette.
During the Mission Status briefing, Alibaruho expressed how pleased the teams on the ground were with the successful deployment of the arrays, and commended the crew on the deployment activities. Mission Management Team Chairman LeRoy Cain noted that the team was working on a revised timetable to allow critical experiment samples to return to Earth safely. The samples need to be kept in a cold environment, and in the event weather delayed the landing, the team evaluated the best way to preserve the samples. The team approved a revised flight plan that allows Discovery to delay hatch closure and undocking slightly, to allow the samples to be kept inside the station's freezer longer, while still protecting the landing date of 28 March. Instead of closing the hatch the night before undocking, the hatch would be closed on the same day, flight day eleven.
It was a truly fantastic day in space. The International Space Station team and its partnerships are on cloud nine with the completion of the integrated truss assembly, as well as the finalization of our electrical power grid on the space station. It took years to get here. We had some struggles along the way, but it's a major accomplishment for NASA and the partnership team.
— Dan Hartman, Space Station Mission Management Team Chairman
STS-119