FMCSR 393.71(k) Fifth Wheel Defective — Driver Q&A

No, 393.71(k) is not an out-of-service violation. However, across our 13 million inspection records, this citation has resulted in an out-of-service placement in 10 of 54 all-time cases—an 18.5% OOS rate. This is substantially lower than the 31.4% average OOS rate across all FMCSR codes, meaning inspectors rarely ground trucks for fifth wheel defects alone. You'll almost certainly be allowed to move the vehicle, though you should address the defect as soon as practical.

A 393.71(k) citation carries an 8-point CSA severity weight. In the 30-day rolling window, if you receive another citation in the same Unsafe Driving or Vehicle Maintenance BASIC, those points stack. The 8-point weight places fifth wheel defects in the mid-range of seriousness. For context, this code ranks #1607 of 3,036 FMCSR codes by citation volume, so it's a relatively uncommon finding—but when cited, the point penalty is meaningful.

First, get the citation details in writing from the inspector. Second, have a qualified mechanic inspect your fifth wheel assembly within 24 hours—the violation covers defects, excessive wear, or improper securing, so you need to know which issue applies. Third, photograph the defect and the repair work. Fourth, keep all documentation (inspection report, receipt, photos) in your vehicle. Finally, contact your carrier's safety department immediately if you're not owner-operated. Do not operate the vehicle long-distance until the defect is corrected.

For vehicle maintenance defects, 393.71(k) is moderately serious. Our data shows it triggers an out-of-service placement only 18.5% of the time, compared to 31.4% for all FMCSR codes. However, it's far rarer than related suspension and attachment violations—we've recorded only 54 citations all-time for this specific code. Peer violations like slack adjuster defects (393.47E) carry 0% OOS rates but occur 180,363 times across our records, indicating both are common safety findings but 393.71(k) generates more inspector discretion for roadside removal.

Yes, you can file a DataQs challenge. Fifth wheel condition is a vehicle equipment observation, which makes it contestable if the inspector's documentation is incomplete, ambiguous, or contradicts roadside photos. File your challenge within 30 days through your carrier's CSA portal or directly with FMCSA. Provide photographs of the fifth wheel taken before and after repair, your mechanic's inspection report, and any evidence that the defect did not exist at the time of inspection. Equipment findings are easier to contest than driver behavior violations because they're physical and verifiable.

393.71(k) is rarely cited. Across 13 million inspections in our database, we've recorded only 54 citations all-time, with zero citations in the last 90 days and zero in the last 12 months. This low frequency suggests either fifth wheel defects are uncommon on the road, inspectors rarely flag them in writing, or they're being caught and corrected before inspection. If you receive this citation, you're in a small population—but the defect should be treated seriously regardless of how often it appears in enforcement data.

Across all-time citations, Dustin C Nolan Logging LLC (USDOT 2142325) and Timber Ridge Resources LLC (USDOT 3228629) each received 2 citations; all other carriers have 1 or fewer. By vehicle make, Freightliner (FRHT) leads with 8 citations, followed by Kenworth (KW) and Peterbilt (PTRB) with 4 citations each. The distribution is sparse—no single carrier or make dominates—indicating fifth wheel defects occur across diverse fleets and equipment rather than concentrating in specific operations.

Very urgent. Although this violation doesn't automatically trigger out-of-service status, the fifth wheel is a critical safety component that couples your tractor to the trailer. A defective, excessively worn, or improperly secured fifth wheel risks trailer separation, jackknifing, or loss of load control. Repair it before your next long-haul or significant distance. Given the extremely low citation frequency (zero in 12 months), inspectors may cite this only when they observe a genuine hazard—meaning the defect is likely visible and material. Address it within 24 hours and document the repair.