What 393.201A means in plain language
FMCSR 393.201A targets a straightforward but serious structural problem: a commercial motor vehicle's frame that is cracked, broken, loose, or sagging in a way that compromises safe operation. The frame is the backbone of the entire vehicle — everything else bolts to it — so when it's compromised, the entire rig's structural integrity is in question.
The key phrase in the regulation is that the damage must rise to the level where it affects safe operation. A hairline surface mark from road debris isn't automatically a violation. What inspectors are looking for is visible cracking through frame rails, broken cross-members, loose frame fasteners, or a noticeable sag in the chassis that changes the geometry of the vehicle.
This is not a paperwork violation. An inspector who flags 393.201A has seen something physical on your truck — something that, in their judgment, puts the vehicle's structural soundness in doubt. Understanding that distinction matters for how you respond and how you prevent a recurrence.
What our enforcement data actually shows
Across our database of 13 million+ inspections, 393.201A has generated 4,524 all-time citations, placing it at #360 out of 3,036 FMCSR codes by citation volume. That's a meaningful presence — not a rarely-written code, but not one of the top-tier volume leaders either.
What stands out is the out-of-service rate. Our inspection records show that 2,166 of those 4,524 citations resulted in an OOS placement, for an all-time OOS rate of 47.9%. The all-FMCSR average OOS rate across our database is 31.4%, meaning 393.201A puts vehicles out of service at a rate more than 16 percentage points above the average. Even though the code is technically not OOS-eligible under standard FMCSR Part 390 annexes, inspectors clearly have discretion here — and they use it aggressively.
Enforcement volume is also climbing. Over the last 12 months alone, our data shows 2,989 citations written under this code — meaning roughly two-thirds of all recorded 393.201A citations in our database have come in just the past year. In the last 90 days, 708 citations were recorded, with monthly counts ranging from 216 in May 2025 to a peak of 347 in February 2026. The trend is not leveling off.
Who gets cited most
Looking at the last 180 days in our inspection records, Texas dominates the citation count for 393.201A with 1,224 citations — far ahead of any other state. New Mexico comes in second with 100 citations, followed by Illinois with 83 citations. These three states alone account for the bulk of recent enforcement activity.
The OOS rate variation across those states is significant and worth noting. Texas, despite its high volume, has a 44.0% OOS rate. New Mexico's rate is 64.0% — a full 20 percentage points higher than Texas. Illinois sits at 53.0%. If you're operating in New Mexico or Illinois, inspectors are placing vehicles out of service on this violation at rates well above the national average for this code. That's a material risk difference depending on your lane.
Among carriers, our data shows fleets such as AGGREGATE HAULERS I L P (USDOT 1021485) with 13 all-time citations and JOSE EVERARDO CAVAZOS PASSEMENT (USDOT 3388203) also with 13 citations appearing at the top of the citation count list. The concentration of citations at certain operations suggests this violation clusters around specific equipment types and maintenance patterns, not random bad luck.
On the equipment side, Freightliner (FRHT) vehicles account for 1,586 all-time citations under this code — by far the most of any make. Kenworth (KW) follows with 703 citations, and Peterbilt (PTRB) with 509 citations. If you're running any of these makes, your pre-trip frame inspection should be a deliberate step, not an afterthought.
How severe is this compared to similar codes
To put 393.201A in context, compare it against peer codes in the Vehicle Maintenance category in our database.
393.9(a) — Inoperable Required Lamps has been cited 660,737 times in our records, with a 15.4% OOS rate. That's a code written roughly 146 times more often than 393.201A, but it puts vehicles out of service at less than one-third the rate. Inspectors treat a broken frame far more seriously than a burned-out lamp.
396.3(a)(1) — Inspection, Repair, and Maintenance (General) shows 236,919 citations and a 45.3% OOS rate in our data. That's a closer OOS rate to 393.201A's 47.9%, and notably, 396.3A1 appears in 99 shared inspections alongside 393.201A in the last 90 days alone — meaning when inspectors find a frame issue, they frequently also write up a general maintenance failure.
393.47E — Slack Adjuster Defective carries 180,363 citations in our database with a 0.0% OOS rate. The contrast is stark: brake adjustment issues are written up far more often but almost never trigger an OOS on their own. A broken frame at 47.9% OOS is in an entirely different enforcement tier.
How to avoid it
The co-occurring violation data in our records tells a clear story: 393.201A almost never shows up alone. In the last 90 days, the most common companion violations span brakes, lighting, fuel systems, and steering. Here's what that means for your pre-trip inspection and ongoing maintenance habits:
- Walk your frame rails completely, every pre-trip. Crouch down and look along the full length of each rail for cracks, bends, or weld failures. Pay special attention to areas near cross-member connections and behind the cab where stress concentrates.
- Check all frame-mounted fasteners. Loose U-bolts, spring hangers, or cross-member bolts are early indicators of a frame under stress — and inspectors look for them.
- Inspect slack adjusters during your brake check (393.47E appeared in 114 shared inspections). Brake system problems and frame problems travel together. If your brake geometry is off, your chassis geometry may be too.
- Look under the vehicle for fuel leaks (396.5B: 114 shared inspections). A fuel system leak often means something beneath the chassis has shifted or cracked. Treat it as a flag to inspect the frame in that area.
- Check steering linkage and components (393.53B: 107 shared inspections). Worn steering components and frame damage are frequently found together on high-mileage units. If steering feels soft or loose, get underneath before your next trip.
- Verify all required lamps are working (393.9: 209 shared inspections). An inoperable lamp is the single most common companion violation in our data. A full lighting check before departure signals to inspectors — and to you — that the vehicle has been properly walked.
- Freightliner, Kenworth, and Peterbilt drivers: schedule periodic frame inspections by a qualified mechanic, especially after high-mileage hauls, rough terrain, or any incident that puts unusual stress on the chassis. Our data shows these makes account for more than half of all 393.201A citations.