Final answer:
Mechanic A is correct, broken leaves in a leaf spring assembly are a cause for failing the federal annual inspection. Mechanic B is incorrect because loose torque arm bushings also represent a safety issue leading to inspection failure. Therefore, the correct answer is a) Mechanic A only.
Step-by-step explanation:
The federal annual inspection guidelines for commercial vehicles are strict regarding the integrity of the suspension system, which includes leaf springs and torque arm bushings. Mechanic A is correct because any broken leaves in a leaf spring assembly are likely to compromise vehicle safety and would be a cause for failing the federal annual inspection. On the other hand, Mechanic B is incorrect because loose torque arm bushings can affect the stability and handling of the vehicle and therefore also represent a safety issue that can lead to failing the inspection.
According to federal regulations:
- Broken leaves in a leaf spring assembly can allow the axle to shift, leading to dangerous driving conditions, and thus are a cause for failure.
- Loose torque arm bushings are also a significant concern as they can lead to a lack of control over the vehicle's alignment, which is critical for safe operation.
Therefore, the correct answer is a) Mechanic A only.