FS-1041 is first encountered in the final section of The Pilot's Gauntlet. He is the simulated Titan called in by Jack Cooper moments before a loss of power aboard the MCS James MacAllan lead to the simulator cutting out, and Jack unable to pilot the Titan.
Later, after Jack's interrogation at the hands of Kuben Blisk and the extraction of the SERE Kit housing the datacore of BT-7274, FS-1041 would be the final Vanguard-class left in the racks of the 9th Militia Fleet. FS would be dropped into the fight sporting a Legion loadout (Including a Predator Cannon), but without his native datacore. The FS-1041 chassis would have the AI of BT-7274 placed into it, allowing Pilot and Titan to fight together once more.
- Given FS being the titan used in the Gauntlet, and later the final Titan in the racks (IE not deployed in combat with another pilot), it is possible that Lastimosa intended to assign the Titan to Jack Cooper.