What 392.9A2-C means in plain language
This citation targets a specific and often overlooked cargo problem: vehicle components or dunnage that are riding along unsecured. Dunnage is any loose material used to protect, brace, or fill space around a load — boards, airbags, lumber, pallets, strapping material, and similar items. When those materials shift freely inside or on top of a trailer without being properly restrained, you've created the conditions for a 392.9A2-C citation.
The rule exists because loose cargo components and unsecured dunnage don't stay put when you brake hard, take a curve, or hit rough pavement. They become projectiles or can shift in ways that destabilize the primary load. A citation under this code means an inspector looked at what was in or on your vehicle and determined that something capable of moving dangerously was not adequately tied down, blocked, or contained.
This is not a paperwork violation. It's a physical condition the inspector observed at the time of the stop, which is why the enforcement response is so aggressive — more on that in the next section.
What our enforcement data actually shows
If you think this citation is going to result in a warning and a wave goodbye, the numbers say otherwise. Across our inspection records, 392.9A2-C carries a 96.4% out-of-service rate — meaning that out of 21,774 all-time citations in our database, 20,980 of those vehicles were placed out of service on the spot. You are not driving away. That 96.4% rate dwarfs the all-FMCSR average OOS rate of 31.4%, making this code more than three times as likely to ground your truck as the average violation across all 3,036 FMCSR codes we track. It ranks #127 out of those 3,036 codes by total citation volume, so inspectors know it and look for it.
The enforcement pace has been accelerating. Our inspection records show 14,831 citations issued in just the last 12 months, and 3,227 of those came in the last 90 days alone. Looking at the monthly trend, citations hit 1,489 in October 2025 — the peak month in the trailing year — and remained above 1,000 every month from May 2025 through March 2026. March 2026 came in at 1,481 citations, with 1,443 of those resulting in OOS orders. This is not a code that enforcement has deprioritized; the volume is consistently high across all seasons.
Because this code is OOS-eligible, being cited almost certainly means your day stops until the condition is corrected and the vehicle is released. Factor in the cost of securing the load, potential re-inspection fees, lost delivery time, and the inspection record that follows you into CSA scoring, and a single citation carries real financial weight.
Who gets cited most
Among states in our data for the last 180 days, Texas leads with 1,487 citations, of which 1,441 resulted in OOS orders — a 96.9% rate. California follows with 1,106 citations and a 93.3% OOS rate. Tennessee comes in third with 400 citations and a 100.0% OOS rate, meaning every single inspection in Tennessee that produced this citation also produced an OOS order. The gap between California's 93.3% and Tennessee's 100.0% is meaningful — if you're running through the Southeast, inspectors there appear to be writing this one with zero tolerance.
Arizona, Washington, New York, Maryland, and Ohio all recorded 100.0% OOS rates in the same period, reinforcing that outside of California and Texas, nearly every citation for this code ends the driver's day immediately.
On the carrier side, our data shows fleets such as Universal Logistics of Virginia LLC (USDOT 3330935) with 40 all-time citations and J B Hunt Transport Inc (USDOT 80806) also with 40 citations leading the list. Western Express Inc (USDOT 511412) has 38 all-time citations in our records. High citation counts at large carriers reflect exposure from sheer fleet size, but the pattern does indicate that no operation — regardless of size or reputation — is immune from this code.
On the equipment side, Freightliner platforms account for 3,187 all-time citations in our database, followed by FRHT-badged vehicles at 2,533 and Kenworth at 1,457. If you're piloting any of these makes, this is a code worth knowing cold.
How severe is this compared to similar codes
Looking at peer codes in the same Unsafe Driving category, 392.9A2-C stands out sharply. Consider 392.2 (Operating a CMV while ill or fatigued), which has 1,208,164 citations in our database — roughly 55 times the volume of 392.9A2-C — yet carries only a 0.8% OOS rate. That means most drivers cited under 392.2 keep rolling. Under 392.9A2-C, 96.4% of drivers do not.
Similarly, 392.2-SLLEQP (also categorized as operating a CMV while ill or fatigued) has 72,352 citations and a 2.4% OOS rate. Even that elevated peer-code rate is a fraction of what 392.9A2-C produces. Another peer, 392.2-SLLSR, has 191,232 citations but just a 0.1% OOS rate — essentially a citation that doesn't stop your truck.
The pattern is consistent: this code is uniquely punishing within its own category. High volume, near-certain OOS, and no realistic chance of talking your way back into the cab until the condition is fixed.
How to avoid it
The co-occurring violation data from our last 90 days makes clear that 392.9A2-C rarely shows up alone. Inspectors who find unsecured dunnage are also finding other problems — and a thorough pre-trip is the only defense. Here's what the data points to:
- Walk the cargo area before every departure. Boards, airbags, empty pallets, edge protectors, and any other dunnage must be secured or removed. If it can slide, stack it against a bulkhead and strap it.
- Check your periodic inspection documentation. 396.17C-PI (no proof of periodic inspection) appeared in 365 shared inspections in the last 90 days alongside this code. Have your annual inspection paperwork accessible before you roll.
- Inspect every lamp on the exterior. 393.9 (Inoperable Required Lamp) co-occurred in 256 shared inspections. A burned-out marker or brake light invites a closer look at everything else, including your load.
- Check slack adjusters and brake components. 393.47E (Slack adjuster defective) appeared in 237 shared inspections. Walk around and push on each slack adjuster — if it moves more than an inch, you have a brake problem to address.
- Verify your fire extinguisher is mounted and secured. 393.95A4-EEUS (fire extinguisher unsecured) co-occurred in 189 shared inspections. That's a bracket check that takes ten seconds.
- Inspect coupling devices and glazing. 393.55E-B (defective coupling device) and 393.60C (window obstructions) both appeared alongside this code in the last 90 days. If you're pulling a trailer, physically check the fifth wheel connection and kingpin engagement, and make sure nothing is blocking your line of sight.