Operators
Helicopter External Load Operations: FAA Part 133
March 5, 2026
FAA Part 133 rotorcraft external-load operators perform one of aviation's most demanding specialties: lifting and transporting loads suspended beneath a helicopter. This includes construction work, logging, firefighting, utility line installation, and search and rescue operations.
Classes of External-Load Operations
The FAA classifies external-load operations by the nature of the load:
- Class A — Load at rest on a surface; helicopter takes off with it
- Class B — Load is lifted free of the surface; not touching during flight
- Class C — Load is carried in water or dragged along a surface
- Class D — "Human external cargo" — personnel carried externally (rescue operations)
Certification
Part 133 operators must hold a rotorcraft external-load operator certificate from the FAA. Pilots must hold a commercial pilot certificate with a helicopter rating and specific training in sling-load operations.
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