USS Thunderchild (NCC-63549) was an Akira-class heavy cruiser on active duty in Starfleet during the late 24th century.
- The Ship Recognition Manual, Volume 1: The Ships of Starfleet gives NCC-65449 as the registry.
In 2373, Thunderchild - under the command of Captain Quinn - fought against the Borg in the Battle of Sector 001. During the battle the crew, including James Dulmis repelled a boarding party of Borg Drones. When most of the fleet was down, the few remaining ships left, including Thunderchild and USS Enterprise-E, were led by acting fleet commander Jean-Luc Picard to take down the Borg cube. (Star Trek: First Contact, Star Trek: The Adventures of Argus: "Trial By Fire")
During the early 2370s, the Thunderchild was one of several starships assigned to Starbase 364 and the Shackleton Expanse. (Star Trek Adventures, Shield of Tomorrow)
In 2376, Thunderchild participated in the Battle of Sol against the Vendoth. (Star Trek: Unity (crossover): "United We Stand - Together")
By 2381, the Thunderchild was under the command of Captain Hector Navarro, and was again assigned to the Shackleton Expanse. (Clear Skies: "The Edge of the Unknown")
- Alternately, in 2380, Thunderchild — under the command of Captain Matsuda — was absorbed into a Borg cube. (TNG novel: Before Dishonor)