Russian fellow Alexey Ovchinin, who survived NASA astronaut Nick Hague and the dramatic shutdown of last year's Soyuz, was scheduled to re-launch into the International Space Station on Thursday.
The two will join US astronaut Christina Koch to take off from Russia's Baikonur space continent in Kazakhstan at 19:14 GMT.
The launch will be closely watched after a short two-person space flight in October, when the Soyuz rocket's technical problem has halted the launch for two minutes.
The two escaped safely.
It was the first accident in the history of Russia's Soviet Union and was once a great frustration for the proud space industry.
Speaking to reporters for a six-month mission, flight commander Ovchinin said some of the projectile flaws were discovered and replaced this week.
"Yesterday they found a slight minor malfunction," said the 47-year-old on Wednesday.
He claimed that the projectile was in good condition.
"There is no problem," Ovchinin said.
Hague, 43, said he was looking forward to the flight.
"I am 100% confident in rockets and spaceships," he said.
The October interruption was caused by a damaged sensor during rocket assembly.
& # 39; outdated but trustworthy & # 39;
Vadim Lukashevich, a space expert, said the last replacement was not ordinary.
"Soyuz is an old but reliable machine," he told AFP.
Russia's space industry has suffered a lot in recent years, including the loss of cargo spaceships and numerous satellites.
Ovchinin, who spent six months at the ISS during his mission before 2016, is eager to end the drama of the October emergency landing.
After a year and a half of preparation, he said, "I was a bit disappointed" after building an "interesting and necessary experience" that deeply examined the preparation of the space plan.
Thursday The 6 hour flight from Koch, The Hague and Ovchinin is being watched carefully for another reason.
SpaceX successfully tested the Dragon vehicle ISS for eight years of monopoly on a space station trip that Russia enjoyed since NASA shut down the space shuttle.
Talking to reporters, the trio and the three-member backup team emphasized cooperation rather than competing along the DragonX mission. Some were seen as the beginning of an era of commercial space travel promoted by entrepreneurs like Elon Musk, who owned SpaceX.
Koch, a 40-year-old space god, has called the success of SpaceX "a good example of what we've been doing for a long time."
"It works among partners and makes it very easy to see things that are very difficult," she said.
& # 39; First spacewalk & # 39;
After the failure of the Soyuz mission, there was a successful launch of the ISS.
When the trio arrives, all six crew members return to orbit the lab.
Oleg Kononenko of the Russian space agency Roscosmos, Anne McClain of NASA and David Saint-Jacques of the Canadian space agency have been orbiting the outpost in December And is expected to welcome a new cremation on Friday.
Hiding their mission, McClain, Saint-Jacques, Hague and Koch will be performing their first spacewalks in their careers.
In the lighter Hague this week, I provided insight into personal arrangements for boarding the ISS.
"In space, we will use the scissors on the vacuum system to prevent the hair from bumping into the vent system or trapping it," he wrote on Twitter.
The International Space Station is a rare area of cooperation between Moscow and Washington, and has been orbiting Earth at a speed of approximately 28,000 km / h since 1998.
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