What 387.7B3II-MC means in plain language
FMCSR 387.7B3II-MC is a General/Administrative citation. The regulation concerns requirements that apply to motor carriers and drivers operating commercial vehicles. When you receive this citation, it means a federal safety inspector found a violation during a roadside inspection related to administrative or general compliance matter falling under section 387.7(b)(3) of the FMCSR.
This is not a vehicle defect citation and not a driver behavior violation like speeding or fatigue. It is an administrative or documentation-related matter. The specific focus depends on the context of your inspection, but it falls within the general compliance framework that the Federal Motor Carrier Safety Administration uses to ensure carriers meet baseline operational standards.
Because this is classified as a General/Administrative violation, it is not eligible to place your vehicle out of service immediately. That means you can typically continue operating while the citation is resolved through your carrier's safety department or legal processes.
What our enforcement data actually shows
Across our 13 million+ real roadside inspection records, 387.7B3II-MC has received 821 all-time citations, with 454 citations in the last 12 months and 75 citations in the last 90 days. This ranks the code at #770 out of 3,036 FMCSR codes by citation volume—placing it in the lower-enforcement range.
The out-of-service rate for 387.7B3II-MC is 0.0%. Not a single vehicle cited for this code has been placed out of service across our entire database. This stands in sharp contrast to the all-FMCSR average out-of-service rate of 31.4%, underscoring that this violation does not trigger immediate removal from service. Our data shows that when inspectors cite 387.7B3II-MC, they view it as a compliance issue that allows the vehicle and driver to remain operational.
Monthly citation trends over the past 12 months show variability. June 2025 saw the highest enforcement activity with 51 citations, while April 2026 (the most recent month in our data) recorded just 2 citations. This suggests enforcement intensity fluctuates, possibly tied to focused compliance sweeps or seasonal inspection patterns.
Who gets cited most
Our inspection records show 193 citations issued in the United States over the last 180 days, with 0 out-of-service placements (0.0% OOS rate). Michigan recorded 2 citations in the same period, also with a 0.0% OOS rate. The concentration of citations in the US national data reflects the broader geographic scope of cross-border and interstate commerce.
When we examine carriers across our all-time database, fleets such as Servicio Internacional de Enlace Terrestre SA de CV (USDOT 818175) with 12 citations and Servicios de Logistica Transnacional en Transportacion SA de CV (USDOT 2380911) with 11 citations show higher citation counts. This does not indicate systematic negligence; rather, it reflects that larger carriers with more vehicle-miles and higher roadside inspection exposure naturally accumulate more citations. Their safety programs manage these citations as part of routine compliance oversight.
How severe is this compared to similar codes
Within the General/Administrative category, peer codes show dramatically higher enforcement volumes. The code 390.21TB2-DOT leads with 74,663 all-time citations but maintains the same 0.0% out-of-service rate. Similarly, 390.21T(b) has 61,097 citations at 0.0% OOS, and 390.21TB1-MC has 59,189 citations at 0.0% OOS. These codes dwarf 387.7B3II-MC's 821 all-time citations by orders of magnitude, yet all share identical zero out-of-service rates, confirming that General/Administrative violations are treated as non-severity violations that do not warrant immediate vehicle removal.
Other administrative codes like 390.21(a) (Vehicle marking requirements) with 25,872 citations and 390.21(b) (USDOT number not displayed) with 13,244 citations also show the pattern: high citation volume paired with 0.0% OOS placement. This consistency across the category indicates that inspectors and FMCSA policy treat administrative violations as compliance matters to be corrected rather than immediate road hazards.
How to avoid it
Our co-occurrence analysis reveals patterns that can guide prevention. The violation most frequently cited alongside 387.7B3II-MC is code 391.11B2-Z (Border Zone - Driver cannot satisfy English language proficiency requirements), appearing in 34 shared inspections over the last 90 days. This suggests many 387.7B3II-MC citations occur in border regions or involve cross-border carriers. Action: Ensure you and your carrier maintain current documentation of driver qualifications, including language proficiency certifications if you operate in border zones.
Other co-occurring violations point to mechanical and safety inspection issues. Fuel system leaks (396.5B-L, 23 shared inspections), brake defects (393.45D-B, 10 shared inspections), coupling device problems (393.55D1-B, 11 shared inspections), and steering issues (393.209E-SPSLA, 12 shared inspections) appear alongside this code. While these are separate violations, their frequency suggests that inspections triggering 387.7B3II-MC may also involve vehicle condition checks.
Before every trip:
- Walk around your vehicle and check brake lines, hoses, and coupling devices for leaks or damage.
- Inspect fuel system components for leaks or corrosion.
- Test power steering function and check for leaks around the steering box.
- Verify all glazing and windshield is clear and undamaged.
- Confirm slack adjusters are secure and moving freely.
- Ensure your pre-trip inspection documentation is complete and signed.
Our data shows Freightliners (239 citations) and International trucks (124 citations) are cited most frequently for this code. If you operate one of these makes, pay extra attention to manufacturer-specific maintenance bulletins and known defect areas during pre-trip walks.
At the administrative level: Work with your carrier to maintain clean driver qualification files, current medical certificates, and all required endorsements. Ensure your USDOT number is properly displayed on your vehicle. Keep records of all driver training and certifications, especially if you cross state or international borders. The data strongly suggests that administrative compliance is the core issue this code addresses.