393.71K-CDLSLM Fifth Wheel Defective: Q&A Guide

It might. Our inspection records show a 60.0% out-of-service rate for fifth wheel defects—significantly higher than the 31.4% average across all FMCSR violations. Of the 5 citations in our database for this code, 3 resulted in OOS placement and 2 did not. Whether an officer places your truck OOS depends on the severity of the defect and whether it poses an immediate safety risk to continued operation.

Fifth wheel defects carry a CSA severity weight of 8. This weight is multiplied by the inspection frequency in your carrier's safety profile over the 12-month rolling window. A single citation can generate points that factor into your carrier's BASIC scores for vehicle maintenance and overall safety. The exact point impact depends on how many other violations occur in the same 30-day period and your carrier's inspection frequency.

First: Do not operate the vehicle if it has been placed out of service. Second: Document the violation details (inspection date, inspector ID, specific defect noted). Third: Contact your fleet safety manager or carrier dispatcher immediately—they must authorize repair before you move the truck. Fourth: Get the fifth wheel assembly inspected and repaired by a certified technician, then request a re-inspection to clear the violation. Fifth: Keep all repair documentation for DataQs contestation if you believe the citation was in error.

Yes, it's more serious than most similar codes. Fifth wheel defects have a 60.0% OOS rate, compared to just 1.8% for lighting devices (393.11) and 0.3% for windshield defects (393.78). However, it's less likely to be cited than brake issues like slack adjuster defects (180,363 all-time citations). Across our 13 million inspections, this code ranks #2406 by citation volume, but when cited, enforcement is relatively strict about vehicle removal.

Yes. Fifth wheel condition is an objective, equipment-based finding—exactly the type of violation that DataQs (FMCSA's Roadside Inspection Data Quality System) can review. To contest: gather photos showing the fifth wheel assembly was properly secured and serviceable on the inspection date, obtain a certified mechanic's inspection report if possible, and submit your challenge within the DataQs timeline. Document any equipment modifications or maintenance performed immediately before the inspection that the officer may have overlooked.

It's rare. Across our 13 million inspection records, only 5 citations for fifth wheel defects exist all-time. In the last 12 months, we recorded 3 citations, and in the last 90 days, zero. This means the violation is not a widespread enforcement focus. However, when defects are found, they're treated seriously—our data shows that 60% of citations result in immediate out-of-service placement.

Our records show citations issued to five carriers, each with one violation: ERB Transport Limited, George Bridgewater Logging Inc, Total Transportation Logistics Inc, Strickland Forest Products LLC, and Dunamis Auto Express LLC. No single carrier dominates the citation history. Vehicle makes cited include Peterbilt (2 citations) and single citations for GDAN, GRDN, INTL, MACK, Pitman Bro, Take, Dodge, and Whitley MF models.

Very urgent if placed out of service. You cannot legally operate the truck until the defect is corrected and re-inspected. Even if not placed OOS, fifth wheel integrity is critical to trailer stability and brake function—delaying repair increases accident risk. Citation frequency has been low recently (0 in the last 90 days), but when violations occur, 60% trigger immediate OOS status, indicating inspectors consider them safety-critical. Repair should be prioritized within hours, not days.