Check quarters fit flat without overlap in an 8-quart air fryer. Use two batches if needed, adding 35 to 40 minutes. Preheat to 380°F for 3 minutes.
Pat skin dry; rub chicken with oil, salt, garlic powder, coriander, paprika, and pepper.
Air fry skin-side down 15 minutes. Turn skin-side up; cook 18 to 23 minutes more.
Check thickest thigh and drumstick beside bones: aim for 175 to 185°F for tenderness, never below 165°F. Add 2-minute intervals if needed.
Rest uncovered 5 minutes; serve one whole quarter per person.