Who is responsible for determining if an aircraft is adequately equipped for flight into icing?

The Pilot in Command (PIC) holds the ultimate responsibility for determining whether an aircraft is adequately equipped for flight into icing conditions. This responsibility stems from the fundamental role of the PIC in ensuring the safety and operational readiness of the aircraft prior to undertaking any flight. The PIC must assess the aircraft's equipment, capabilities, and conditions to decide if it can safely operate in icing environments, including evaluating whether specialized anti-icing or de-icing equipment is functioning and available.

Additionally, regulations and standard operating procedures emphasize the PIC’s authority and responsibility for flight safety. They must be well-versed in the aircraft's performance characteristics and limitations related to icing and take into account any current weather reports or forecasts relevant to icing conditions as part of their pre-flight planning and decision-making process.