Skip to page content

USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

United States Department of TransportationUnited States Department of Transportation

AC 120-91 (Cancelled) - Airport Obstacle Analysis

Document Information

Advisory Circulars home

Document Information

Cancellation notes
AC 120-91A
Date cancelled
January 13, 2020
Date issued
May 05, 2006
Responsible office
AFS-400
Description

Describes acceptable methods and guidelines for developing takeoff and initial climb-out airport obstacle analyses and in-flight procedures to comply with the intent of the regulatory requirements of Title 14 of the Code of Federal Regulations part 121,§§ 121.177, 121.189, and part 135, §§ 135.367, 135.379 and powered airplanes operated under parts 121 and 135

Document content