When I play Thrill of the Hunt on a unit that has a Long Sword attached, when it gets played to the battlefield after being banished, does it no longer have the attached equipment?

When you play Thrill of the Hunt on a unit with a Long Sword attached, the equipment does not remain attached to the unit when it is played to a battlefield after being banished.

Reasoning

1. Banishment: When Thrill of the Hunt resolves, it banishes the friendly unit. According to Rule 427.1, banishing is the action of placing a card from any zone to Banishment.
2. Detachment: When a unit moves from a board zone (the battlefield) to a non-board zone (Banishment), any attached equipment must detach. Equipment is attached to a "Top-Most Card" (the unit) while on the board; when that unit leaves the board for a non-board zone, the link is broken.
3. Re-playing the Unit: Thrill of the Hunt then instructs the owner to play the unit to any battlefield. Because the unit was banished, it is now a new object entering the battlefield from the Banishment zone. It does not bring the previously attached Long Sword with it.

Summary

• Thrill of the Hunt banishes the unit.
• The Long Sword detaches because the unit has left the board.
• The unit is played to a battlefield as a new object without the equipment.

Note: I could not fully verify this ruling against the retrieved rules.