What 393.201A-FRSC means in plain language
A 393.201A-FRSC citation means a roadside inspector found your truck's frame—the steel backbone that holds everything together—to be cracked, loose, broken, or sagging in a way that compromises safe operation. This isn't a minor cosmetic issue. The regulation exists because a compromised frame can affect steering response, brake performance, load stability, and structural integrity under stress.
Inspectors cite this code when the damage is significant enough to create a safety risk. A small surface crack that doesn't affect structural function won't trigger the citation. But widespread cracking, deep breaks, severe rust-through, or visible sagging will. The inspector makes a judgment call: does this condition actually affect safe operation? If yes, they issue the citation.
What our enforcement data actually shows
Across our 13 million inspection records, 393.201A-FRSC has been cited 1,251 times all-time, with 664 citations in the last 12 months and 122 in the last 90 days. This code ranks #663 out of 3,036 FMCSR codes by citation volume—not the most common violation, but far from rare.
The critical number: our data shows a 98.7% out-of-service rate for this citation. That means when an inspector cites 393.201A-FRSC, they remove the truck from service in nearly every case. To put that in perspective, the all-FMCSR average out-of-service rate is 31.4%. This code is cited at roughly triple the severity threshold of a typical FMCSR violation. The inspection database indicates that once a frame defect is documented, inspectors treat it as a show-stopper—the truck doesn't move until it's repaired.
The monthly trend across the last 12 months shows variability: citations ranged from a low of 35 in April 2025 to a peak of 76 in July 2025, with a general upward swing through summer and a decline into winter and spring 2026.
Who gets cited most
Our inspection records show California leads by a significant margin: 111 citations over the last 180 days, all resulting in out-of-service placements (100% OOS rate). The second-highest is an aggregate designation for unmapped or unclear state codes, with 49 citations. Arizona follows with 13 citations, also at a 100% OOS rate. Missouri, Kansas, Utah, Montana, Colorado, Georgia, and Wyoming round out the top ten, each with between 5 and 9 citations in the 180-day window.
Notably, across all top states, the OOS rate is uniformly at or near 100%, with no meaningful variation. This consistency underscores that frame defects are treated as non-negotiable safety issues regardless of geography.
Carrier data shows that operations with multiple citations include SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV (10 citations all-time), HUNGAROS TRANSPORTISTAS SA DE CV (8 citations), TRANSERVICIOS SA DE CV (8 citations), VRP TRANSPORTES DE MEXICO S DE RL DE CV (8 citations), and TRANSPORTADORA NORTE DE CHIHUAHUA S A DE C V (8 citations). These fleets appear more frequently in our data, suggesting either higher inspection exposure, larger fleet sizes, or maintenance challenges warranting focused attention on frame inspection protocols.
How severe is this compared to similar codes
Within the Vehicle Maintenance category, 393.201A-FRSC stands apart. The most frequently cited code overall is 393.9(a)—Inoperable required lamps—with 660,737 all-time citations but only a 15.4% OOS rate. By contrast, 393.201A-FRSC has been cited just 1,251 times yet carries a 98.7% OOS rate. This illustrates the distinction: lamp defects are common and often minor; frame defects are rare but severe.
Another peer code is 396.3(a)(1)—Inspection/repair/maintenance general—which has 236,919 all-time citations and a 45.3% OOS rate. Frame defects exceed that severity by a factor of 2.2 in terms of out-of-service likelihood. Similarly, 393.47E—Slack adjuster defective—has generated 180,363 citations historically but a 0.0% OOS rate, meaning brake adjusters are rarely grounds for immediate removal from service. Frame structural failure is treated as categorically different.
How to avoid it
Frame integrity depends on preventing damage and detecting deterioration before an inspection. Our data reveals patterns of co-occurring violations that point to root causes and prevention measures.
Pre-trip frame and suspension inspection: The most common co-occurring violations are 393.47E (Slack adjuster defective, 17 shared inspections), 393.45D-B (Brake tubing/hoses inadequate, 16 shared inspections), and 393.53B-B (Steering system components worn, 14 shared inspections). These brake and steering defects often indicate neglected overall truck condition. Walk around your truck and look for visible cracks, rust perforation, or sagging in the main frame rails, crossmembers, and cab mounts. Pay particular attention to areas where the frame meets the fifth wheel or where trailers connect, as stress concentrations crack first.
Brake and steering system checks: Because slack adjusters, brake tubing, and steering components frequently appear alongside frame citations, inspect brake lines for rubbing against frame members (which can cause stress cracks), and verify steering linkage is secure. Loose or worn steering places excessive side loads on the frame during cornering.
Tire and suspension maintenance: 393.75A3 (Tires leaking or underinflated, 15 shared inspections) and 393.207A (Suspension defective, 11 shared inspections) co-occur with frame issues. Underinflated tires and suspension problems change the truck's stance and increase frame flex. Maintain tire pressure to spec and inspect springs and shock absorbers for wear.
Vehicle-specific history: Our database shows FREIGHTLINER units account for 275 citations (the highest among makes), followed by WABASH National trailers (178) and FREIGHTLINER again under variant coding (174). If you operate one of these makes, implement heightened frame inspection frequency. Older or high-mileage examples warrant visual inspection every 25,000 miles or quarterly.
Fatigue and operator attention: 392.2-SLLSR (Operating while ill or fatigued, 15 shared inspections) appears in our co-occurrence data, suggesting tired drivers may miss warning signs—unusual handling, noise, or vibration that signals frame movement. Pre-trip inspection is most effective when you're alert.
Bottom line: a 98.7% out-of-service rate means this citation almost always ends your trip immediately. The cost of roadside repair, towing, and downtime far exceeds the 15 minutes it takes for a thorough pre-trip frame check. Make it non-negotiable.