What 393.45A-HJS means in plain language
Brake tubing and hoses are the veins of your truck's stopping system. They carry pressurized fluid from the brake valve to the brake chambers at each wheel. When these tubes or hoses become worn, chafed, crimped, or otherwise damaged, they can leak or rupture—turning a working brake system into one that may fail without warning.
Inspectors look for visible deterioration: cracks, abrasions where tubing rubs against metal, kinks that restrict flow, or corrosion that weakens the walls. A single compromised line can disable brakes on one or more axles. That's why this violation is taken seriously at roadside.
What our enforcement data actually shows
Across our 13 million+ inspection records, we've logged 48 all-time citations for 393.45A-HJS, with 40 citations in the last 12 months and 8 in the last 90 days. The data shows that this code triggers an out-of-service order 87.5% of the time—substantially higher than the 31.4% all-FMCSR average OOS rate.
Out of 48 total citations in our database, 42 resulted in vehicles being placed out of service. Only 6 were cited but allowed to continue. This 87.5% OOS rate reflects the safety-critical nature of brake system integrity. When a tubing or hose defect is found, inspectors rarely allow the truck to roll. Ranked #1651 of 3,036 FMCSR codes by citation volume, this is not a high-frequency violation—but when it happens, enforcement is swift and grounding.
Who gets cited most
Our inspection records show that Texas leads in 393.45A-HJS citations over the last 180 days, with 14 citations and a 71.4% OOS rate—meaningfully lower than the 87.5% national rate for this code, though the small sample size (14 inspections) makes state-level variation less predictable.
At the carrier level, our data shows fleets such as J&P PAVING CO INC (USDOT 1981450), BEST SAND & TRUCKING COMPANY (USDOT 878032), ROBERTO ALONZO PEREZ JR (USDOT 2869666), and ABRAHAM ROMERO REYES (USDOT 4153898) each with 2 citations in our records. Many other carriers appear with single citations, underscoring that this violation is dispersed rather than concentrated in any one operation.
How severe is this compared to similar codes
Brake-system violations fall into a spectrum. The most frequently cited brake code in our database is 393.9 (Inoperable Required Lamp), which has 180,097 all-time citations but only a 6.9% OOS rate—indicating inspectors often cite lighting defects without immediate grounding. By contrast, 393.45A-HJS's 87.5% OOS rate places it among the most consequential brake-related findings.
Another peer code is 393.47E (Slack adjuster defective), which has accumulated 180,363 citations but shows a 0.0% OOS rate—many slack adjuster defects can be remedied on the road or tolerated for short moves. The difference is stark: tubing and hose damage is deemed an immediate safety hazard, while slack adjuster issues are treated more leniently. A third comparison is 396.3(a)(1) (Inspection/repair/maintenance—general), which has 236,919 citations and a 45.3% OOS rate, reflecting mixed severity across maintenance violations.
How to avoid it
Our inspection data reveals patterns in co-occurring violations that point to effective prevention strategies:
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Conduct a thorough pre-trip brake-system walk-around. Trace every brake line from the cab to the wheels. Run your hand (gloved, if necessary) along tubing and hoses. Feel for soft spots, bulges, cracking, or areas where the outer jacket is worn through. The data shows 393.47E (slack adjuster defects) co-occurs in 3 recent inspections, and 396.3A1BOS (brakes out of service) in 3 more—indicating that brake system checks catch multiple defects at once.
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Look for chafing and rubbing points. Brake lines often run alongside sharp edges, fasteners, or moving parts. If a line is rubbing against frame, suspension, or engine components, friction will eventually breach the outer casing. Inspect bends and clips that secure the tubing. If a line is bent too sharply or not supported, it will crimp and fail.
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Replace any line showing discoloration or surface damage immediately. Corrosion on steel tubing, hardening or cracking of rubber hose jackets, and seepage around fittings are red flags. Our vehicle-make data shows Freightliner (FRHT) leads with 15 citations for this code, followed by Kenworth (KW) with 10 and Utility (UTIL) with 8—suggesting no particular truck brand is immune. Regardless of your vehicle type, proactive replacement prevents roadside failures.
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Schedule brake-system inspection as part of your weekly maintenance cycle. Given the 87.5% OOS rate, a citation for tubing or hose damage is almost certain to take you out of service, costing hours or days and freight deadlines. Prevention is far cheaper than downtime.
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If you're cited, ask the inspector for a detailed description of the damage. Understand exactly which line, which defect, and which axle or component is affected. This information helps you or a repair facility address the root cause—not just replace one hose, but identify why it failed.