What can be a consequence of neglecting to train technicians on the latest materials?

Neglecting to train technicians on the latest materials can lead to increased risks of safety hazards and substandard repairs because technicians who are not updated on new materials may not understand their properties, limitations, or proper handling techniques. This lack of knowledge can result in inappropriate application of the materials during repairs, compromising the structural integrity of the aircraft. For instance, if a technician uses an outdated technique on modern composite materials, it could lead to failure under stress or environmental conditions, presenting serious safety risks to the aircraft and its occupants.

In the context of the other options, while higher maintenance costs and regulatory compliance issues can arise from inadequate training, the most immediate and critical consequence is the potential compromise of safety. Improvement in workplace morale is unlikely if technicians feel unprepared or unsafe in their work due to lack of training. Therefore, the primary concern of safety and quality in repairs underscores why comprehensive training on the latest materials is essential.