Definition of Critical Surfaces

Verified from official sources
SOR/96-433, s. 901.35Version 1Effective -Verified 23 August 2026

In plain language

Critical surfaces that must be free of ice, frost, or snow include the wings, rotors, propellers, control surfaces, stabilizers, and any other surface specified as critical in your drone's user manual.

Requirement as structured

Defines 'critical surfaces' as the wings, control surfaces, rotors, propellers, horizontal and vertical stabilizers, any other stabilizing surfaces, and any surfaces identified as critical in the system's operating manuals.

Original regulatory text

For the purposes of subsection (2), critical surfaces means the wings, control surfaces, rotors, propellers, horizontal stabilizers, vertical stabilizers or any other stabilizing surfaces of the remotely piloted aircraft, as well as any other surfaces identified as critical surfaces in the operating manuals applicable to the system.

Applies when

country
Canada
regulatory category
General