Descrizione : Expedition 54,EVA 1
Flight Enginereers MARK VANDE HEI and
SCOTT TINGLE completed the first Spacewalk of 2018 lasting 7 hours, 24 minutes.
The two astronauts replaced a latching end effector (LEE) on the station`s robotic arm, CANADARM 2.
Expedition 54,EVA 2
Expedition 54 Commander Alexander Misurkin and Flight Engineer Anton Shkaplerov of the Russian space agency Roscosmos completed a record breaking spacewalk lasting 8 hours and 13 minutes installing a new electronics and telemetry box for the high gain antenna on the Zvezda service module to enhance communications between Russian flight controllers and their modules.
EVA 3
third EVA Mark Vande Hei and Norishige Kanai left the International Space Station on February 16, 2018 (5h 57m). The two spacewalkers moved a Latching End Effector (LEE), or hand, for the Canadian-built robotic arm, Canadarm2, from a payload attachment on the station`s Mobile Base System rail car to the Quest airlock. This LEE was replaced during an Expedition 53 spacewalk in October 2017, and will be returned to Earth to be refurbished and returned to the orbiting laboratory as a spare.
They also moved an aging, but functional, LEE that was removed during a January 23, 2018 spacewalk from its temporary storage outside the airlock to a long-term storage location where it will be available as a spare part for the Mobile Base System, which is used to move the arm and astronauts along the station`s truss structure.

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