will 393.120(d) put my truck out of service
Yes—but only in rare cases. Across our inspection records, a truck cited for 393.120(d) was placed out of service in 1 instance out of 1 all-time citation, giving this code a 100.0% OOS rate. However, this is a single data point. For context, the national average OOS rate across all FMCSR codes is 31.4%, so metal coil securement violations are not automatically an off-road finding. The inspector's assessment of the specific securement failure will determine whether the load presents an immediate hazard.