Recovery (リカバリー Rikabarī), in the Mid-Childan magical science, refers to the instantaneous repair and restoration of a damaged Device, powered by its master's mana.
It is likely not a separately programmed spell, and it is not to be mixed up with the supportive High Altitude Recovery spell which is orally shortened as "Recovery".
Fate Testarossa has uses this skill twice to repair Bardiche in Nanoha (ep.12) and A's (ep.2). Vita (probably with Hayate Yagami's help the second time) also repairs Graf Eisen on the Saint's Cradle in StrikerS.