11/07/2005. Korolev, Moscow Region.

The International Space Station (ISS) Expedition-12 crew consisting of ISS-12 commander, NASA astronaut W. MacArthur and ISS-12 flight engineer, Russian cosmonaut V. Tokarev did an egress to the Station surface to perform the planned operations on extravehicular activity.
The main tasks: mounting of external video cameras, dismantling and removal of the external electric potential measurement sensor at the external surface of the Station USOS.
Besides, in case of the remaining time reserve a decision was adopted to solve a number of additional tasks.
The egress was provided through the Kvest airlock and it was the fourth egress provided from the Station USOS.
The hatch opening occurred at 18:30, Moscow time (15:30, Greenwich time) and was performed with a delay for 1 hour.
The delay reason was organizational-technical.
The crew had to return to the module pressurized compartment for transfer to the electric control mode of the valve providing the remaining air discharge from the module compartment to the ISS space environment as in the operating procedure for preparation for extravehicular activity there was no instruction for obligatory control of this step execution. Therefore, the crew who was controlled by the U.S. operational control team of the Mission Control Center, Houston, USA, did not provide the valve transfer to the required state and they were not requested from the Earth in due time to confirm the execution of this action.
Despite the delay, the crew solved all these tasks successfully and returned to the Station having closed the airlock hatch at 23:47, Moscow time (20:47, Greenwich time).
The total time spent to perform operations at the Station surface was 5 hours 17 minutes.