FMCSR 393.71(a) Fifth Wheel Defective: Citations & Consequences

No. Across our inspection records, 393.71(a) citations have a 0.0% out-of-service rate. This violation is cited but does not trigger an immediate OOS placement. That said, the defect itself—a defective, excessively worn, or improperly secured fifth wheel—creates a safety risk and must be corrected. Do not delay repairs; an inspector on a subsequent roadside check will escalate if the problem persists.

393.71(a) carries a CSA severity weight of 8 points. This weight is multiplied by the number of violations within a 30-day rolling window—so if you receive one citation, you get 8 points. Multiple citations in 30 days compound quickly. The weight of 8 places this in the mid-range for vehicle maintenance violations, neither minor nor catastrophic, but still a meaningful marker on your safety profile.

1. Get the citation in writing and photograph the defect noted by the inspector.
2. Schedule repairs immediately with a certified technician—fifth wheel assemblies are critical coupling components.
3. Document the repair (receipt, work order, date completed) for your records.
4. Request re-inspection if the inspector requires it, or plan for it on your next roadside stop.
5. Review your maintenance logs to ensure fifth wheel inspections are part of your routine.

Do not operate the vehicle in an unsafe condition.

Yes and no. Our inspection data shows 393.71(a) has a 0.0% out-of-service rate, which is better than the national average OOS rate of 31.4% across all FMCSR codes. However, peer violations in the same category vary widely: inoperable lamps (393.9) trigger OOS 15.4% of the time, while general inspection/repair violations (396.3) result in OOS 45.3% of the time. The fifth wheel defect is less likely to result in immediate removal, but the underlying safety issue is serious.

Yes. The FMCSA DataQs (Roadside Data Quality Review) system allows drivers and carriers to challenge citations they believe are incorrect or unjustified. For 393.71(a), you can contest if the inspector's assessment was factually wrong—for example, if the fifth wheel was not actually defective or improperly secured. Gather photographic evidence, repair records, and maintenance documentation to support your appeal. Submit your challenge through your FMCSA portal within the allowable window.

393.71(a) is rare. Across our 13 million+ inspection records, this code ranks #2,796 out of 3,036 FMCSR codes by all-time citation volume, with only 1 citation on record. In the last 12 months, we logged 0 citations, and 0 in the last 90 days. The lone citation in our database involved a Freightliner vehicle cited to AUTO TRUCK TRANSPORT USA LLC. This low frequency suggests fifth wheel defects are uncommon findings.

Fix it before your next inspection. The 0.0% out-of-service rate means you won't be pulled off the road immediately, but that does not mean the defect is safe to ignore. A fifth wheel is the coupling point between tractor and trailer—failure can cause jackknife, loss of cargo, or collision. Because citations have been extremely rare (0 in the last 90 days), future inspectors will scrutinize this closely if you're cited again. Repair immediately.

The citation follows the carrier and the vehicle, not the driver personally. Under FMCSA's CSA program, violations are recorded in the carrier's Safety Management System (SMS) and factored into the company's Behavior Analysis and Safety Improvement Categories (BASICs). Drivers are responsible for pre-trip and post-trip inspections to catch defects, but enforcement is ultimately a carrier-level metric. If you switch carriers, the citation remains tied to the previous company's record.