Final answer:
KC-135 cylinders are condemned for corrosion, cracking, and leakage. Option d.
Step-by-step explanation:
KC-135 cylinders are condemned for all of the above reasons: corrosion, cracking, and leakage. KC-135 cylinders are condemned for reasons such as corrosion, cracking, and leakage, as these conditions pose threats to the safety and integrity of the aircraft.
KC-135 cylinders may be condemned for several reasons which are crucial for the safety and integrity of the aircraft. These reasons include corrosion, cracking, and leakage. Each of these represents a significant threat to the structural integrity and functionality of the cylinder. In the aviation industry, ensuring that all parts meet rigorous safety standards is of utmost importance to prevent potential accidents or failures during operations. Therefore, if a KC-135 cylinder exhibits any signs of these conditions, it is deemed unfit for use and must be condemned.