From Halopedia, the Halo wiki
Alyn Vallum was stationed on the ship when it sacrificed its slipspace drive in 2531 and entered into cryostasis along with the rest of the crew and complement. In 2559, she and the others were awakened to find themselves above Installation 00. LCDR Vallum summarized the major modifications and architectural changes made to the Spirit of Fire by Serina before she initiated final dispensation in 2537 for Captain Cutter. She noted that while logs were still being evaluated and teams were being sent to sweep each compartment, so far no discrepancies had been found that would impact the ship's readiness.