FMCSR 393.44 Q&A: Bus Front Brake Line Protection

No. Across our 13 million inspection records, 393.44 carries a 0.0% out-of-service rate. The one citation in our all-time database did not result in an out-of-service order. For comparison, the national average out-of-service rate across all FMCSR codes is 31.4%, so this violation is significantly less likely to sideline your vehicle than most citations.

Extremely rare. Our inspection records show only 1 citation for 393.44 all-time, with 0 citations in the last 12 months and 0 in the last 90 days. This code ranks #2796 out of 3,036 FMCSR codes by citation volume. You are far more likely to be cited for codes like 393.9 (inoperable required lamps, 660,737 citations) or 393.11 (lighting devices/reflectors, 179,734 citations).

First, inspect the front brake line protection on your bus for damage, corrosion, or missing guards. Document the condition with photos and date. Contact your carrier's maintenance team and provide them the citation number and inspection report. Request a written repair work order. Once repaired, ask the inspector or your company to document the corrective action. Keep all receipts and repair records. If you believe the citation is inaccurate, you can request DataQs review through FMCSA's online portal within 90 days.

Compared to related violations in the vehicle maintenance category, 393.44 is among the least-cited and least likely to result in out-of-service action. For example, 393.47E (slack adjuster defective) has 180,363 citations and a 0.0% OOS rate. However, 396.3(a)(1) (general inspection/repair/maintenance) has 236,919 citations with a 45.3% OOS rate. The rarity of 393.44 enforcement suggests inspectors rarely flag this defect in roadside checks.

Yes. FMCSA's DataQs (Crash & Inspection Roadside Review) process allows drivers and carriers to challenge violations they believe are inaccurate or unjustified. You have 90 days from the inspection date to submit a request through FMCSA's DataQs portal. Provide clear evidence—such as maintenance records, repair receipts, or photos showing the brake line protection was compliant. DataQs reviews documentation and equipment condition findings, though success depends on the quality of evidence you provide.

Our inspection records contain only 1 citation for 393.44 all-time, making state-level analysis impossible. The single citation was issued to a vehicle operated by Sunday River Skiway Corporation (USDOT 754722). With such minimal enforcement volume, there is no meaningful geographic concentration or trend to report.

Low urgency from an out-of-service perspective, since the 0.0% OOS rate means repair is not an immediate roadside shutdown risk. However, the brake line is a critical safety component. You should schedule repair within 1–2 weeks to ensure compliance and prevent a more serious follow-up citation. Zero citations in the last 90 days suggests enforcement is infrequent, but safety standards require the protection to be in place.

Both. FMCSA assigns violations to both the driver and the carrier in their Safety Management System. The citation will appear on your driving record and your carrier's record, affecting both your CSA profile and the company's safety metrics. Your carrier may review the citation during hiring decisions, rate audits, or insurance evaluations, so it is in your interest to document prompt corrective action and keep repair records on file.