CBO Safety Guidelines - Modifications, Hazmat, and Weapons

Verified from official sources
AC 91-57C ¶ 3.3.2.1Version 1Effective -Verified 22 August 2026

In plain language

Recreational flyers must not modify their aircraft in a way that creates a hazard, carry hazardous materials, or equip their UA with dangerous weapons.

Requirement as structured

The FAA recommends that CBO safety guidelines restrict hazardous aircraft modifications, remind operators to comply with hazardous materials regulations, and prohibit operating a UA equipped with a dangerous weapon.

Original regulatory text

Prohibition on modifying UA and the carriage of hazardous materials or weapons. The FAA recommends that CBOs consider including a restriction on customizing or modifying the aircraft in such a way that creates a hazard to the public or the NAS in their safety guidelines. CBOs are strongly encouraged to include a statement reminding operators that they must comply with applicable regulations for the carriage of hazardous materials... The FAA also recommends that CBOs remind operators that Federal law prohibits operating a UA that is equipped or armed with a dangerous weapon unless authorized by the Administrator.

Applies when

country
United States
operation
recreational
operator type
Community-Based Organization
regulatory category
General