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 violations13,594,393
Out-of-service violations2,416,602
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 |
|---|---|---|---|---|
| 178.337-17B-HMP | HM (Packaging) - MC 331 name plate marking requirements | 0 | 7 | 0.0% |
| 178.337-17C-HMP | HM (Packaging) - MC 331 specification plate marking requirements. | 0 | 9 | 0.0% |
| 178.337-1C-HMP | HM (Packaging) - MC331 requirements for openings | 0 | 4 | 0.0% |
| 178.337-1D-HMP | HM (Packaging) - MC 331 reflective design. | 0 | 6 | 0.0% |
| 178.337-3G3-HMP | HM (Packaging) - MC 331 requirements for mounting pad use for the welding of appurtenances to the cargo tank wall | 0 | 2 | 0.0% |
| 178.337-8A4I | MC331 Remote closure device >3500 gal | 0 | 4 | 0.0% |
| 178.337-8A4I-HMP | HM (Packaging) - MC 331 remote closure device greater than 3500 gallons. | 0 | 19 | 0.0% |
| 178.337-8A4II | MC331 Remote closure device <3500 gal | 0 | 1 | 0.0% |
| 178.337-8A4II-HMP | HM (Packaging) - MC 331 remote closure device less than 3500 gallons. | 0 | 17 | 0.0% |
| 178.337-8A-HMP | HM (Packaging) - MC 331 general requirements for openings. | 0 | 7 | 0.0% |
| 178.337-9 | MC331 Pressure relief devices | 0 | 1 | 0.0% |
| 178.337-9B-HMP | HM (Packaging) - MC 331 general piping, valves, hose, and fitting requirements. | 0 | 12 | 0.0% |
| 178.337-9C | MC331 Marking inlets/outlets | 0 | 35 | 0.0% |
| 178.337-9C-HMP | HM (Packaging) - MC 331 improper marking of inlets/outlets. | 0 | 96 | 0.0% |
| 178.338-10C | MC338 Rear end protection | 0 | 7 | 0.0% |
| 178.338-10C-HMP | HM (Packaging) - MC 338 rear-end tank protection. | 0 | 1 | 0.0% |
| 178.338-10D-HMP | HM (Packaging) - MC 338 ground clearance. | 0 | 1 | 0.0% |
| 178.338-10E | VOID Ground clearance MC338 | 0 | 1 | 0.0% |
| 178.338-11B-HMP | HM (Packaging) - MC 338 manual shutoff valve. | 0 | 2 | 0.0% |
| 178.338-11C | Missing or Defective Thermal and Mechanical Remote Closure Device | 0 | 3 | 0.0% |
| 178.338-13-HMP | HM (Packaging) - MC 338 supports and anchoring requirements. | 0 | 6 | 0.0% |
| 178.338-14B-HMPV | HM (Packaging) - MC 338 visibility requirement for pressure gauge - must be visible to the driver in the rearview mirror. | 0 | 1 | 0.0% |
| 178.338-18A | MC338 Name plate and/or Specification plate missing | 0 | 3 | 0.0% |
| 178.338-18A-HMP | HM (Packaging) - MC 338 general marking requirements. | 0 | 1 | 0.0% |
| 178.338-18B-HMP | HM (Packaging) - MC 338 name plate marking requirements. | 0 | 1 | 0.0% |
| 178.338-18C-HMP | HM (Packaging) - MC 338 specification plate marking requirements. | 0 | 3 | 0.0% |
| 178.338-8 | MC338 Pressure relief devices | 0 | 2 | 0.0% |
| 178.340-10B | MC306/307/312 metal certification plate missing | 0 | 14 | 0.0% |
| 178.340-10-HMP | HM (Packaging) - MC 306/307/312 certification plate. | 0 | 24 | 0.0% |
| 178.340-7A | MC306/307/312 ring stiffeners | 0 | 3 | 0.0% |
| 178.340-7C | MC306/307/312 double bulkhead drain | 0 | 12 | 0.0% |
| 178.340-7C-HMP | HM (Packaging) - MC 306/307/312 double bulkhead drains. | 0 | 11 | 0.0% |
| 178.340-7D | MC306/307/312 ring stiffeners | 0 | 1 | 0.0% |
| 178.340-7D2-HMP | HM (Packaging) - MC 306/307/312 ring stiffener drain hole. | 0 | 4 | 0.0% |
| 178.340-8A-HMP | HM (Packaging) - MC 306/307/312 appurtenances attachments | 0 | 5 | 0.0% |
| 178.340-8B | MC306/307/312 rearend protection | 0 | 8 | 0.0% |
| 178.340-8B-HMP | HM (Packaging) - MC 306/307/312 rear-end protection. | 0 | 3 | 0.0% |
| 178.340-8C | MC306/307/312 overturn protection | 0 | 1 | 0.0% |
| 178.340-8C-HM | HM (Packaging) - MC 306/307/312 overturn protection. | 0 | 1 | 0.0% |
| 178.340-8D1 | MC306/307/312 piping protection | 0 | 1 | 0.0% |
| 178.340-8D2 | MC306/307/312 minimum road clearance | 0 | 10 | 0.0% |
| 178.340-8D2-HMP | HM (Packaging) - MC 306/307/312 minimum road clearance | 0 | 6 | 0.0% |
| 178.341-1-HMP | HM (Packaging) - MC 306 general requirements. | 0 | 5 | 0.0% |
| 178.341-5A2 | MC306 remote control shutoff | 0 | 9 | 0.0% |
| 178.341-5-HMP | HM (Packaging) - MC 306 requirements emergency flow control | 0 | 11 | 0.0% |
| 178.342-1-HMP | HM (Packaging) - MC 307 general requirements. | 0 | 1 | 0.0% |
| 178.342-3 | MC307 manhole closure | 0 | 1 | 0.0% |
| 178.342-4-HMP | HM (Packaging) - MC 307 improper venting requirements. | 0 | 1 | 0.0% |
| 178.342-5A2 | MC307 remote control shutoff | 0 | 2 | 0.0% |
| 178.343-3-HMP | HM (Packaging) - MC 312 manhole requirements | 0 | 1 | 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 ↗