This draft AC provides standards for the planning, design, and construction of takeoff and landing facilities serving vertical flight aircraft. Once finalized and published, it will cancel AC 150/5390-2D, Heliport Design, dated January 5, 2023, and Engineering Brief 105A, Vertiport Design, Supplemental Guidance to Advisory Circular 150/5390-2D, Heliport Design, dated December 27, 2024. Please see the industry letter for instructions for submitting comments. Vertical Flight Aircraft Infrastructure Design Industry Day The FAA will host a virtual Industry Day on November 10, 2026, from 10 am to 1:30 pm EST. Please see the industry letter for more information and instructions for registering.

• Industry Letter for Draft AC 150/5390-4 - (PDF)
• Comment Matrix for Draft AC 150/5390-4 - (MS Excel)