What 393.207F-SASMD means in plain language
Your citation is for a suspension system defect: an air spring or air bag is either missing entirely or has come loose from its mounting point at the top or bottom. Air springs are critical load-bearing components that connect your truck's frame to its axles. When one detaches or goes missing, that axle loses its cushioning and support, creating an unsafe ride height and shifting weight unevenly across the remaining suspension points.
This isn't a minor wear item. A detached air spring means one side of your suspension is working alone, compromised. The truck becomes unstable under load, especially on curves or during braking. Inspectors flag this because the vehicle is mechanically unfit to operate safely on public roads.
What our enforcement data actually shows
Across our 13 million inspection records, 393.207F-SASMD has been cited 1,052 times all-time, with 660 citations in the last 12 months and 131 in the past 90 days. This ranks the code #703 out of 3,036 FMCSR codes by citation volume—not the most common violation, but far from rare.
Here's the critical number: 71.7% of citations result in out-of-service placement. That means roughly 3 out of 4 trucks cited for this defect are pulled from service immediately. For context, the all-FMCSR average OOS rate is 31.4%. This code's rate is more than double that baseline, signaling inspectors view it as a serious safety issue requiring immediate repair before the vehicle moves.
In the last 90 days alone, 131 citations were issued, with an estimated 93 resulting in OOS orders based on our all-time rate. That's a steady stream of enforcement.
Who gets cited most
Our inspection records show California leads by far: 130 citations in the last 180 days, though only 42.3% resulted in OOS placement—notably lower than the national rate. Georgia, Tennessee, Oklahoma, and Utah each logged 11, 11, 11, and 10 citations respectively, all with 100% OOS rates. Pennsylvania, Ohio, and Arizona also show 100% OOS rates on their smaller citation counts.
The state-by-state variation is striking: California's 42.3% OOS rate versus Georgia's 100% OOS rate suggests different enforcement philosophies or fleet composition. If you operate in a state with a 100% rate, inspectors are taking zero tolerance.
Among carriers, our data shows fleets such as Crown Xpress Transport Inc. with 5 all-time citations, followed by several carriers with 4 citations each (Carlos Ornelas, Premium Freight de Mexico SA de CV, Lee's Trucking, Keystone Petroleum Transport LLC, Advanced Logistical Services LLC, J B Hunt Transport Inc., KTR Logistics Inc., and United Parcel Service Inc.). No single carrier dominates, indicating the defect cuts across fleet types and sizes.
How severe is this compared to similar codes
In the vehicle maintenance category, this code's OOS rate stands out sharply. Compare it to peer codes:
- 393.9(a) (Inoperable required lamps): 660,737 all-time citations but only 15.4% OOS rate. Lamps are far more frequently cited but far less likely to result in removal from service.
- 396.3(a)(1) (Inspection/repair/maintenance – general): 236,919 citations with 45.3% OOS rate. A broader category with moderate enforcement severity.
- 393.47E (Slack adjuster defective): 180,363 citations with 0.0% OOS rate. Brake adjusters are cited often but rarely trigger OOS placement.
393.207F-SASMD occupies a middle ground in citation count (1,052) but punches well above its weight in enforcement severity (71.7% OOS rate). Inspectors treat a detached air spring as an immediate safety hazard, not a warning or minor deficiency.
How to avoid it
Our inspection records reveal patterns that can guide prevention:
Before each shift:
- Walk the entire length of both sides of your truck. Look for any air spring/bag that appears separated from its top or bottom mounting bracket. A healthy connection sits flush; a detached one hangs loose or shows a gap. If you see separation, do not operate the vehicle.
- Check for visible damage to air spring housings—cracks, punctures, or leaks indicate the component is failing and may detach.
- Confirm the truck maintains normal ride height. If one side is noticeably lower than the other, an air spring may already be compromised.
Addressing co-occurring defects: Our data shows that 393.75A3 (tire inflation issues) appears in 33 of the last 90 days' co-occurring inspections with your code. Low tire pressure forces your air suspension to work harder. Maintain all tires to manufacturer specification before departing. Similarly, 393.47E (slack adjuster defects) co-occurs 22 times, and 393.53B-B (steering component wear) 18 times. A comprehensive pre-trip that includes tires, brakes, and steering catches the ecosystem of issues that compound suspension failure.
Vehicle-specific insight: Our records show FRHT vehicles (210 citations for this code) and Kenworth trucks (145 citations) are the most frequently cited makes. If you drive one of these models, increase your inspection frequency and familiarize yourself with where your air springs sit and how they should look when secure.
Maintenance discipline: Don't delay air suspension repairs. Once a spring detaches or shows signs of damage, it can fail catastrophically under load. A preventive repair—replacing a worn or leaking spring—costs far less than a roadside citation, towing, and the hours lost to OOS placement.