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.

United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

Search Results

Number, title, description, or office

Advisory Circulars (ACs) search results
Number Title Status Office Date
91-26 Maintenance and Handling of Airdriven Gyroscopic Instruments

Advises operators of general aviation aircraft of the need for proper maintenance of air-driven gyroscopic instruments and associated air filters.

Active AFS-310 1969-07-02