What issue can arise from missing or broken leaves in any leaf spring?

When leaf springs are compromised due to missing or broken leaves, it can significantly affect the vehicle's suspension system. A functional suspension is crucial for maintaining stability, handling, and safety while driving. If the leaf springs are damaged, the vehicle may not have adequate support, which can lead to poor ride quality and handling. In severe cases, the integrity of the vehicle may be put into question, rendering it unsafe for operation.

An "out of service" designation may be applied when a vehicle is deemed unroadworthy due to issues that could lead to unsafe driving conditions. Such conditions could include misalignment, instability, or failure to adequately support the vehicle’s weight and load. Regulatory inspections and safety standards emphasize the importance of a fully operational suspension system. Therefore, it is correct to state that missing or broken leaves in any leaf spring could indeed lead to the vehicle being "out of service" as safety is a paramount concern for commercial vehicles.