A zoning dispute at New Jersey’s Solberg-Hunterdon Airport has escalated into a potential nationwide precedent that threatens small airfields across the US. The Aircraft Owners and Pilots Association is intervening in a lawsuit against Readington Township’s new ordinance, which allegedly misapplies state air-safety zoning laws to restrict rather than protect the privately owned, public-use airport. Aviation groups warn the case could enable municipalities nationwide to squeeze out small airports through zoning tactics, circumventing formal legal proceedings.