PSA Jon's Immediate Action Items & Limitations Practice Test 2025 - Free Practice Questions and Study Guide

Using contaminated runways is a violation of procedures during takeoff because such conditions pose significant risks to the safety of the aircraft. Contaminated runways can include surfaces that are slippery due to ice, snow, or standing water, which can lead to reduced traction and increased stopping distances. These factors can compromise an aircraft's ability to achieve adequate performance during the critical stages of takeoff and landing, where proper control and stability are paramount.

In contrast, the other options provided—using idle thrust, full-rated thrust, and TOGA thrust—are all operationally acceptable under appropriate circumstances, depending on the aircraft's performance requirements and operational guidelines. Idle thrust can potentially be used during certain scenarios where reducing power is necessary, while full-rated and TOGA thrust are often utilized to maximize performance during takeoff. Understanding the implications of runway conditions is crucial for ensuring compliance with safety protocols and standard operating procedures in aviation.