We circulate Draft Advisory Circulars to interested industry associations to obtain comments and recommendations for action. To receive email alerts when we post new Draft ACs, select the "Subscribe" link above.
Draft ACs
| Number | Title | Current AC | Comment deadline |
|---|---|---|---|
| 150/5390-4 (PDF) |
Draft AC 150/5390-4, Vertical Flight Aircraft Infrastructure Design
(posted 2026-10-22)
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. |
N/A | 2027-01-11 |
Procedure for Commenting on Draft ACs
See the industry letter for each draft to determine specific instructions for submitting comments. If you are a member of one of the following industry organizations, you can also submit your comments via the organization.
- Air Line Pilots Association
- Air Transport Association of America
- Aircraft Owners & Pilots Association
- Aircraft Rescue and Fire Fighting Working Group
- Airport Consultants Council
- Airports Council International
- Allied Pilots Association
- American Association of Airport Executives
- American Council of Engineering Companies
- American Society of Civil Engineers (Transportation & Development Institute) 1
- DOD Policy Board on Federal Aviation 2
- Experimental Aircraft Association
- General Aviation Manufacturers Association
- Vertical Aviation International
- International Air Transport Association
- National Air Transportation Association
- National Association of State Aviation Officials
- National Business Aviation Association
- Regional Airline Association
Note 1 - For ASCE, submit comments to:
Muhammad Amer, M.ASCE
Director, Transportation & Development Institute of ASCE.
Note 2 - For DOD Policy Board on Federal Aviation, submit comments to:
DOD Policy Board on Federal Aviation
1480 Air Force Pentagon
Washington, DC 20030-14
(405) 736-2067