FMCSR 393.71 Fifth Wheel Defective: Citations & OOS Rate

Yes, most likely. Across our inspection records, 393.71 citations result in an out-of-service placement 69.9% of the time. That's significantly higher than the all-FMCSR average OOS rate of 31.4%, meaning inspectors treat fifth wheel defects as serious safety issues. Of the 73 all-time citations in our database, 51 resulted in immediate OOS orders. If cited, assume your truck will be pulled from service until the fifth wheel assembly is repaired and passes re-inspection.

A single 393.71 violation carries a severity weight of 8 CSA points. Under the CSA 2010 scoring system, points are then multiplied by a severity factor over a rolling 30-month window. The actual impact on your carrier's BASIC score depends on the number and timing of violations, but an 8-point severity weight is moderate-to-high in the Vehicle Maintenance BASIC category. One citation can impact your carrier's safety rating for up to 2.5 years.

First, comply with the out-of-service order if issued (which happens 69.9% of the time). Next, inspect the entire fifth wheel assembly for excessive wear, cracks, or loose fasteners, and document the condition with photos. Our data shows that 393.71 often co-occurs with medical certificate issues, fatigued driving violations, and CDL status problems—so verify your medical card is current and in your possession. Schedule a certified repair shop to inspect and certify the fifth wheel before requesting re-inspection. Keep all repair records and receipts.

Yes, significantly. The 69.9% OOS rate for 393.71 is far higher than most peer codes in the Vehicle Maintenance category. For comparison, inoperable required lamps (393.9) have a 15.4% OOS rate, and defective slack adjusters (393.47E) have a 0.0% OOS rate. Fifth wheel defects are treated as critical safety issues because they directly affect trailer stability and coupling integrity. Only codes like general inspection/repair/maintenance (396.3) exceed 393.71's severity, with a 45.3% OOS rate.

Yes, 393.71 is contestable through the FMCSA's DataQs system if you believe the citation was issued in error or the inspection process was flawed. Since this is an equipment condition violation (not a documentation or record issue), your best grounds for appeal are: the inspector failed to follow proper inspection procedures, the defect was not present at the time of inspection, or repairs were already completed before the citation was issued. File your DataQs challenge within 90 days of the inspection, and provide photographic or mechanic evidence supporting your claim.

Over the last 180 days, Texas leads with 3 citations and a 33.3% OOS rate. Illinois and North Carolina each had 1 citation in that period, both resulting in out-of-service orders (100% OOS rate). However, all-time data shows Freightliner tractors (9 citations), Ford (5), and Volvo (5) are most frequently cited for fifth wheel defects. Enforcement is sporadic nationwide—393.71 ranks #1516 out of 3,036 FMCSR codes by citation volume—but when it is cited, the consequences are severe.

Extremely urgent. In the last 90 days, our records show 4 citations for 393.71, and recent monthly trends show spikes: 4 citations in March 2026, 2 in July and December 2025. These are enforcement patterns indicating regulators are actively targeting fifth wheel conditions. Once cited, your truck cannot legally operate until the defect is corrected and verified. Do not attempt to drive under an OOS order—fines and additional violations will follow. Schedule repair within 24 hours of citation and complete re-inspection immediately.

Both. The violation is recorded against both your carrier and you as the operator. In the FMCSA's Safety Management system, it affects your carrier's Vehicle Maintenance BASIC score under CSA 2010, which is used to rank fleets and trigger compliance reviews. As a driver, it may also be included in your Personal Conveyance Record (PCR) and Motor Carrier Safety Record if you drive for multiple carriers. Your carrier is responsible for vehicle maintenance; you are responsible for pre-trip inspections. The citation will remain on your carrier's safety record for 36 months.