393.71K-CDLSMF: Fifth Wheel Defect Citation – What Happens Next

Yes—but not every time. Across our inspection records, 393.71K-CDLSMF citations resulted in an out-of-service order 58.3% of the time (7 OOS placements out of 12 total citations). That's significantly higher than the national average OOS rate of 31.4% across all FMCSR codes. If an inspector finds excessive wear or the fifth wheel isn't properly secured, expect a real possibility of being parked until it's fixed.

This violation carries a CSA severity weight of 8 points. The actual impact on your carrier's CSA Safety Fitness Determination depends on the specific BASIC category (Vehicle Maintenance) and whether the violation occurred within the last 30 days—newer violations are weighted more heavily. One citation in the last 30 days is worth more than one from 90 days ago. Your carrier's safety team can show you the exact current CSA score impact in the FMCSA Portal.

1. Do not operate if the inspector placed the truck OOS—that's a federal violation.
2. Document the citation number and inspector name/badge.
3. Photograph the fifth wheel assembly as-is (for DataQs appeal if needed).
4. Contact your carrier's safety/maintenance team immediately with the citation number and defect description.
5. Do not move the vehicle until maintenance confirms the fifth wheel is repaired and properly secured.
6. Keep the inspection report and any repair receipts for your records.

Yes. The 58.3% OOS rate for fifth wheel defects is much higher than most peer codes. For comparison: inoperable lamps (393.9) have a 6.9% OOS rate, and lighting devices overall (393.11) sit at 1.8% OOS. However, general inspection/repair requirements (396.3(a)(1)) run 45.3% OOS. Fifth wheel defects rank higher than average because they directly affect trailer coupling safety—a critical failure point. The FMCSA enforces this code at #2132 of 3,036 total codes by citation volume.

Yes, you can file a DataQs request if you believe the citation was issued in error or the record is incomplete. Fifth wheel conditions are equipment findings—inspectors rely on visual assessment and mechanical testing. Your grounds for contest might include: the fifth wheel was actually in compliance when inspected, the inspector didn't follow proper diagnostic steps, or documentation is missing. File within 90 days of the citation through your carrier's FMCSA registration account. Success depends on evidence you can provide (photos, repair records, maintenance logs).

Over the last 180 days, our records show Michigan and Virginia each issued 1 citation for this violation, both resulting in out-of-service orders (100% OOS rate in those states). While the citation volume is low nationwide—only 5 citations in the last 12 months—the high enforcement rate in these two states suggests inspectors there are conducting thorough fifth wheel assessments. Most citations for this code come from Freightliner (4 citations) and utility trailers (3 citations) in our all-time data.

Urgent. Our data shows 5 citations in the last 12 months with 0 citations in the last 90 days—recent enforcement is sporadic but serious when it happens. More telling: when cited, 58.3% of trucks are immediately placed out of service. You cannot legally operate until the defect is corrected. Excessive wear, cracks, bent components, or loose bolts on a fifth wheel create catastrophic failure risk (trailer uncoupling). Repair this before any revenue move. Your carrier's maintenance team should assess and document the fix within 24 hours.

This violation follows the carrier, not the driver. It appears in the carrier's Vehicle Maintenance BASIC in the CSA Safety Fitness Determination. All vehicle defects—including fifth wheel issues—are carrier-level violations because the carrier is responsible for maintaining roadworthy equipment. Your driver record is separate. The citation impacts your carrier's BASIC score and contributes to their CSA percentile ranking, which can affect insurance rates and DOT audit frequency.