What 393.207C-SSLMS means in plain language
Your truck's suspension system relies on spring leaves to support the weight of your cargo and keep your wheels in contact with the road. A spring leaf is a curved metal blade that works in a bundle with other leaves to absorb shock and maintain ride height.
When one of these leaves is missing or has separated from the bundle, your suspension loses load-bearing capacity. This can happen due to fatigue, corrosion, impact damage, or simply metal failure over time. The missing or separated leaf reduces the spring's ability to distribute weight evenly, which can cause the truck to sit lower on one side, create uneven tire wear, and compromise your handling and braking.
This violation flags a structural defect that directly affects vehicle safety. Inspectors catch it during roadside inspections when they visually examine your suspension components or when a driver reports handling problems.
What our enforcement data actually shows
Across our 13 million inspection records, we have documented 446 all-time citations for this violation, with 227 citations in the last 12 months and 47 in the last 90 days. This ranks the code at #959 of 3,036 FMCSR codes by citation volume—a relatively uncommon citation, but one with severe enforcement consequences.
The out-of-service rate for 393.207C-SSLMS is 99.6% (444 out of 446 all-time citations resulted in an out-of-service order). This is drastically higher than the all-FMCSR average out-of-service rate of 31.4%. When an inspector finds a missing or separated spring leaf, they almost always ground the truck immediately. You cannot legally operate the vehicle until the defect is corrected.
Monthly citation volume has been steady throughout the past 12 months, ranging between 7 and 27 citations per month, with a notable peak in August 2025 at 27 citations and a low in April 2025 at 7 citations.
Who gets cited most
Our inspection records show this violation is concentrated in a small number of states. New York leads with 20 citations in the last 180 days, followed by California with 15 citations and Georgia with 10 citations. All three states enforced an out-of-service rate of 100%—every single citation resulted in the truck being placed out of service.
Pennsylvania, Washington, New Jersey, and South Carolina each recorded 4 citations in the past 180 days, all at 100% out-of-service rates. Arizona, Maryland, and Colorado round out the top 10 states with 3, 3, and 2 citations respectively, also all resulting in out-of-service orders.
Our data shows Federal Express Corporation has the highest citation count at 7 all-time violations, followed by Fully Loaded Logistics LLC and P & M Trucking Inc with 4 citations each. This does not imply systemic negligence; it reflects the volume of inspections and the random nature of mechanical failure across large fleets.
How severe is this compared to similar codes
Compared to other vehicle maintenance violations, 393.207C-SSLMS is treated far more harshly. The peer code 393.9(a) (Inoperable required lamps) has been cited 660,737 times but carries only a 15.4% out-of-service rate. Code 396.3(a)(1) (Inspection/repair/maintenance – general) shows 236,919 citations with a 45.3% out-of-service rate. Code 393.78 (Windshield condition defective) has 157,894 citations but only a 0.3% out-of-service rate.
The 99.6% out-of-service rate for 393.207C-SSLMS is substantially higher than all comparable codes. Inspectors treat suspension defects as immediate safety hazards that cannot be driven past; lamps and windshields can often be repaired on the road or the truck operated under limited conditions, but a broken suspension cannot.
How to avoid it
Spring leaf failures are often preceded by other mechanical issues. Our data shows that inspections citing 393.207C-SSLMS frequently co-occur with brake defects (code 396.3A1-BOS appears in 7 shared inspections over the last 90 days) and brake tubing/hose problems (code 393.45B2-B-AIR in 5 shared inspections). This suggests that general under-maintenance or deferred repairs increase the risk of suspension failure.
Before every trip:
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Walk around the truck and visually inspect the suspension. Look at the leaf springs under the rear axles and tag axles. If you see a gap where a leaf should be, or a leaf that is visibly bent or separated from the bundle, report it immediately. Do not drive.
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Check for uneven ride height. If one corner of the truck sits noticeably lower than the others when empty, a spring leaf may be failing. Have a technician inspect before loading.
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Listen and feel for handling changes. A truck with a broken spring leaf will handle poorly—it may pull to one side, bounce excessively, or feel unstable when braking. Any change in handling should trigger a full suspension inspection.
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Perform regular brake and suspension service. Our data shows that vehicles with Freightliner, Ford, International, Hino, and Kenworth chassis—the makes most frequently cited for this violation—need consistent maintenance. Include suspension in your periodic inspection schedule, not just brakes.
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Don't defer maintenance. Spring leaves fail under load over time. If you notice rust, cracks, or bending during pre-trips, get it repaired before it separates completely. The 99.6% out-of-service rate means this violation will stop your truck dead if found at roadside.