What should be done if ground icing conditions are present before takeoff?

Conducting a thorough pre-takeoff contamination check is a critical step when ground icing conditions are present before takeoff. This check ensures that any accumulation of ice or frost on the aircraft's wings, control surfaces, and other critical areas has been properly assessed and addressed. Ice or frost can significantly impact the performance and handling of an aircraft, particularly during takeoff and initial climb.

By performing this check, the flight crew can identify any contamination that may affect the aircraft's aerodynamics and take the necessary steps to ensure safety, such as de-icing or anti-icing procedures. This process is essential in preventing potential incidents related to insufficient lift or control authority caused by ice accumulation.

Other options are less appropriate in this scenario. Proceeding without precautions could lead to safety hazards, and only relying on Type I fluids without a check may not guarantee complete removal of ice or frost. Additionally, skipping the check due to time constraints undermines safety protocols that are critical during adverse weather conditions.