The FAA posted draft AC 150/5390-4 on October 22, 2026, with comments due January 11, 2027. Its subject is vertical-flight infrastructure design. For an operator deciding what to build, that is a more useful immediate hook than another rendering of a future network.
The document is a proposal. Its eventual replacement of existing heliport and vertiport guidance depends on finalization. A project should distinguish the guidance currently applicable to its design from changes under consultation.
That creates a practical investment problem. A site owner may need to reserve land, arrange power and develop an operating concept before every aircraft or design assumption is settled. Waiting for perfect certainty can delay a useful project; committing all the capital at once can lock in expensive assumptions.
A staged plan is one way to manage that tension. Begin with site rights, access, constraints and the intended mission. Identify which work remains useful across different aircraft types. Separate reversible studies from equipment or construction decisions that depend on a particular operating envelope. Put explicit decision gates around the latter.
The FAA's infrastructure guidance also recognizes the role of existing airports and heliports. Existing aviation use may offer a starting point, but it does not prove that a site has the right geometry, electrical supply, community support or permissions for a new operation.
Local land-use decisions and federal aviation responsibilities both matter. A favorable announcement from one authority should not be treated as the complete approval package. Nor should a partnership be described as a functioning facility before its actual status is documented.
The immediate opportunity is to participate in the design conversation with an operating case in hand: intended aircraft, daily movement assumptions, passenger handling, emergency arrangements and expansion triggers. The commercial question is whether those assumptions can survive realistic demand and aircraft availability—not whether the first rendering looks finished.