CBO Guidance on UA Maintenance Standards

Verified from official sources
AC 91-57C ¶ 3.3.2.4Version 1Effective -Verified 22 August 2026

In plain language

Follow your manufacturer's maintenance instructions, or general CBO maintenance guidelines if you built the drone yourself.

Requirement as structured

The FAA recommends that CBO safety guidelines instruct flyers to maintain their UA according to manufacturer instructions, or provide general maintenance guidance for homebuilt UA.

Original regulatory text

Guidance that a UA and its associated elements should be maintained in accordance with the manufacturer’s instructions. For homebuilt UA or those without manufacturer instructions, safety guidelines should provide general maintenance guidance.

Applies when

actor
Community-Based Organization (CBO)
country
United States
regulatory category
General