Rulings powered by The Netrep API. You can Set the Equip Spell Card the same turn you play 'Fairy of the Spring'. When you add an Equip Spell Card to your hand with 'Fairy of the Spring', and the same turn it is returned to the Deck with 'Fiber Jar', and you draw it, you can activate it that same turn.
Add 1 Equip Spell Card from your Graveyard to your hand. You cannot activate that Equip Spell Card this turn.
Fairy of the Spring