Annex OrbisFMCSA · SAFETY STATISTICS
What puts trucks and drivers out of service?
The most frequent out-of-service violations in our indexed FMCSA inspection records, ranked by violation code.
Recorded violations13,571,170
Out-of-service violations2,411,961
Violation codes2,379
All violation codes
Highest OOS count first. Codes with no recorded OOS occurrences appear last.
| Violation code | Description | OOS occurrences | All occurrences | Share of all OOS |
|---|---|---|---|---|
| 393.9A-LFTSI | Lighting - Front - Turn signal - inoperative | 129 | 83,043 | 0.01% |
| 393.48A-BS | Brake - Smoking | 128 | 143 | 0.01% |
| 393.45A-BLCB | Hydraulic Fluid Lines Restricted, Cracked or Broken | 126 | 135 | 0.01% |
| 392.2W | Excessive Weight violation | 125 | 123,322 | 0.01% |
| 392.5A | Driver consuming an intoxicating beverage within 4 hours before operating a motor vehicle | 125 | 134 | 0.01% |
| 393.47C | Mis-matched slack adjuster effective length | 125 | 1,619 | 0.01% |
| 393.205B | Stud/bolt holes elongated on wheels | 124 | 172 | 0.01% |
| 393.48A-BSRFSAD-SA | Air Disc Brake - Severe rusting of brake rotor (disc) on a steering axle | 124 | 138 | 0.01% |
| 393.209E | Power steering violations | 123 | 19,066 | 0.01% |
| 393.207E-S | Suspension - Broken torsion bar. | 121 | 224 | 0.01% |
| 393.70C-CDTEW | Coupling - Full Trailer, drawbar eye worn more than 20% | 120 | 126 | 0.01% |
| 395.13D | Driving after being declared out-of-service for HOS violation(s) | 120 | 195 | 0.01% |
| 393.17B2-LRLDWR | Lighting - Tail lamp - Both Lamps on rearmost vehicle driveaway missing when required to be on. | 119 | 123 | 0.0% |
| 383.95A | Violating airbrake restriction | 118 | 121 | 0.0% |
| 393.48A-BRMMC | Brakes - Rotor (disc) metal-to-metal contact | 116 | 220 | 0.0% |
| 392.9AA2-C | Operating beyond the scope of Operating Authority Granted - Providing prohibited point-to-point transportation services (Cabotage) | 115 | 168 | 0.0% |
| 393.62-BEO | Buses - Required emergency exit obstructed (includes obstructions of the markings, release or mechanism and/or the opening of the emergency exit) | 115 | 124 | 0.0% |
| 393.65 | Fuel system requirements | 115 | 332 | 0.0% |
| 393.205A-WRC | Wheel/Rim - Rim, spoke wheel, or adapter cracked | 113 | 2,953 | 0.0% |
| 396.3A1-TP | Tires - Use of Tire Plug or Cord | 113 | 187 | 0.0% |
| 177.801 | Accepting or Transporting Hazardous Materials not prepared in accordance with regulations | 112 | 450 | 0.0% |
| 393.70B1I-CDFWC-MT20 | Coupling - 20% or more of the fifth wheel mounting angle iron cracked/broken | 112 | 117 | 0.0% |
| 383.93B4 | No hazardous materials endorsement on CDL | 111 | 111 | 0.0% |
| 393.75F1 | Weight carried exceeds tire load limit | 111 | 231 | 0.0% |
| 393.70B1II | Defective / Improper fifth wheel assembly upper half | 110 | 262 | 0.0% |
| 396.3A1-BBS | Hydraulic brake backup system is inoperative | 110 | 118 | 0.0% |
| 393.51C-BNVLAWD | Air Brake - No visual low air warning device manufactured on or after 1975. | 109 | 2,325 | 0.0% |
| 391.41A1-LOC | No medical certificate in driver's possession - vision, hearing, insulin using, epilepsy or any condition causing loss of consciousness | 107 | 145 | 0.0% |
| 393.70B1I-CDMFW | Coupling - Movement of the fifth wheel mounting components | 107 | 122 | 0.0% |
| 383.93B3 | No tank vehicle endorsement on CDL | 106 | 109 | 0.0% |
| 393.45DCPC | Brake Connections with Constrictions - Connection to Power Unit | 106 | 629 | 0.0% |
| 393.75I1 | Operating a CMV while weight carried exceeds tire rating due to under-inflation | 106 | 193 | 0.0% |
| 393.132B | Prohibited use of synthetic webbing | 104 | 110 | 0.0% |
| 393.207B-AALPME | Any of the locking pins are missing or not engaged. | 104 | 3,544 | 0.0% |
| 173.24F1-HMGP | HM (General Packaging) - Closures for packagings not properly closed/secured | 103 | 163 | 0.0% |
| 177.834J2-HMBPDV | HM (Bulk Packages) - Fill/inspection openings or discharge valves | 103 | 106 | 0.0% |
| 393.70C-CDTPHF | Coupling - Full Trailer, pintle hook loose/missing fasteners. | 103 | 109 | 0.0% |
| 172.334 | Prohibited ID number marking | 100 | 211 | 0.0% |
| 392.9BA-NOREG-2INTRA | Operating a commercial motor vehicle in intrastate commerce with no USDOT number when required and a history of operating a commercial motor vehicle with no USDOT | 100 | 108 | 0.0% |
| 393.17A | No/defective lamps-towing unit-towaway operation | 100 | 119 | 0.0% |
| 393.70C-CDTDM | Coupling - Full Trailer, more than 1/4 inch movement between sub frame and drawbar | 100 | 100 | 0.0% |
| 396.3A1-AABRF50 | The sliding suspension attachment member (undercarriage body rail) on either side exhibits 50% or more of attachment fasteners missing. | 98 | 105 | 0.0% |
| 396.3A1-BHPB | Hydraulic power brake unit is inoperative | 97 | 99 | 0.0% |
| 393.124E-CCP | Concrete Pipe - Improper securement of pipe up to 45 inches in diameter. | 96 | 96 | 0.0% |
| 393.11A1-LPLOWR | Lighting - Projecting load - Any lamp on projecting load inoperative when required to be on | 95 | 95 | 0.0% |
| 395.3B1-PROP | Driving after 60 hours on duty in a 7 day period. (Property carrying vehicle) | 95 | 142 | 0.0% |
| 396.3A1-HS | Hub smoking | 94 | 100 | 0.0% |
| 386.72B4-OOSOMC | OOS Order - Motor carrier operating a CMV while an existing out-of-service order is in effect: Imminent Hazard - Motor Carrier | 93 | 95 | 0.0% |
| 393.45A-BHB | Hydraulic Brake Hose bulges or swells under pressure | 93 | 97 | 0.0% |
| 395.3B2-HOSPRNC | Driving after 70 hours on duty in a 8 day period at time of inspection. (Property carrying vehicle) - Nominal Violation | 93 | 108 | 0.0% |
How to read this report
Each indexed violation identity counts once. Only a violation explicitly marked out of service contributes to the OOS count. Repeated copies are counted once; conflicting code or OOS values are excluded. Unknown flags remain in all occurrences but not in the OOS count. Missing codes appear as “Code not reported”.
These are violation counts, not unique inspections, trucks, drivers, or carrier-wide out-of-service orders. Coverage describes the currently indexed inspection dataset, not all historical FMCSA records. Frequencies do not establish crash causation or a carrier’s safety rating.
Unknown OOS flags: 112 · Conflicting records excluded: 0
FMCSA source data ↗