Flight Standards Service

Draft Advisory Circulars (ACs) Open for Comment

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Document Title:AC 91-70D CHG 1, Oceanic and Remote Continental Airspace Operations
Summary:

This change reflects adjustments to the FAA designation of the Northern Area of Magnetic Unreliability (AMU) to include the area north of 75° N latitude in the Nuuk (Greenland) flight information region (FIR) and updates references throughout.

References:

Title 14 of the Code of Federal Regulations (14 CFR):

Documents for Download:Draft Document (PDF)
Draft Document Comment Grid (MS Word)
Comments Due:June 22, 2026
How to Comment:Email comments to:
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Last updated: Friday, May 22, 2026