Bad luck has beset the vessel before—a crane smashed onto its deck last October and it lost two planes in the Syrian conflict.
It was the latest setback for the ageing vessel.
The old Admiral Kuznetsov had a calamitous trip to Syria.
Russia dismissed jokes by U.K. Defense Secretary Michael Fallon and called the new HMS Queen Elizabeth "a large, convenient naval target."
Despite being taunted during its last trip to Syria, the Admiral Kuznetsov may sail for "at least" another 20 years, Russia says.
The Kremlin's brief assessment described the work as tense and heroic.