N500BU is reserved. Fee-paid reservation held by Unser Lisa — if it isn't renewed, the FAA releases it on May 9, 2027 (in about 10 months).
Reserved by an individual or company for $10 per year.
Reservations lapse more often than you'd think. Check back around May 9, 2027 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in May 2027.
N500BU has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N500BU that aren't assigned or reserved: