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.
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 |
|---|---|---|---|---|
| 395.8D1-HOSF | HOS (Form) - Record of duty status form failed to include date for each 24 hour period. Date: | 1 | 174 | 0.0% |
| 395.8D4-HOSF | HOS (Form) - Record of duty status form failed to include name of carrier for each 24 hour period. Date: | 1 | 752 | 0.0% |
| 395.8D5-HOSF | HOS (Form) - Record of duty status form failed to include driver signature/certification for each 24 hour period. Date: | 1 | 4,125 | 0.0% |
| 395.8D6-HOSF | HOS (Form) - Record of duty status form failed to properly indicate 24 hour period starting time for each 24 hour period. Date: | 1 | 125 | 0.0% |
| 395.8F05 | Driver failed to record truck or tractor and trailer unit number for each 24 hour period | 1 | 690 | 0.0% |
| 395.8F08I | Driver failed to utilize proper time base for each 24 hour period | 1 | 640 | 0.0% |
| 395.8F4-HOSM | HOS (Manner) - Driver's record of duty status failed to record total miles driven for each 24 hour period. Date: | 1 | 1,172 | 0.0% |
| 395.8F8I-HOSM | HOS (Manner) - Driver's record of duty status failed to utilize proper time standard at the driver's home terminal, for each 24 hour period. Date: | 1 | 131 | 0.0% |
| 396.1 | Must have knowledge of and comply with the Federal Motor Carrier Safety Regulations | 1 | 552 | 0.0% |
| 396.3A1-AALPHTS-L6 | Any locking pin hole has torn or split material from the hole in use to an adjacent hole or from the hole in use to the edge of the rail | 1 | 72 | 0.0% |
| 396.3A1-AALPHW-L6 | Any locking pin hole in use measures more than 1 inch (25.4 mm) larger than its original size. | 1 | 30 | 0.0% |
| 396.3A1-BACPPF-L6 | Air Brake - Air compressor drive belt pending or probable failure. | 1 | 26 | 0.0% |
| 396.3A1-CDFWC-LT20 | Coupling - Fifth wheel plate is cracked 20% or less of the distance across the metal in the direction of the crack | 1 | 3 | 0.0% |
| 396.3A1-CDTDCL | Coupling - Semi-Trailer, drawbar slider cylinder leaking | 1 | 1 | 0.0% |
| 396.3A1-CDTDEC | Coupling - Semi-Trailer, drawbar eye cracked. | 1 | 1 | 0.0% |
| 396.3A1-CDTDSM | Coupling - Semi-Trailer, drawbar slider movement more than 1/4 inch | 1 | 1 | 0.0% |
| 396.3A1-CDTDW | Coupling - Semi-Trailer, drawbar has welded repair | 1 | 1 | 0.0% |
| 397.15 | HM vehicle fueling violation | 1 | 1 | 0.0% |
| 398.7-MW | Migrant Workers - Inspection and maintenance of motor vehicles used for transportation of migrant workers | 1 | 4 | 0.0% |
| 398.8D1-MW | FAILURE TO CORRECT DEFECT(S) ON PREVIOUS INSPECTION REPORT; WASHER FLUID INOP. NOTED ON INSP. REPORT ON 4/28/26 | 1 | 996 | 0.0% |
| 399.207B-CBP | Cab-Over-Engine truck or tractor only - Truck and truck tractor cab access violations | 1 | 396 | 0.0% |
| 49.521B2E | 49 USC 521Failing to allow a designated employee of FMCSA to inspect and copy any record and/or inspect and examine equipment, lands, buildings, or other property | 1 | 2 | 0.0% |
| 124.24H1-HMGP | HM (General Packaging) - Packaging filled beyond the allowable limit. | 0 | 2 | 0.0% |
| 14901D3 | 49 USC 14901(d)(3) Failure to register as a Household Goods broker or carrier | 0 | 38 | 0.0% |
| 171.12A | Violation of US requirements for Transport Canada TDG shipment | 0 | 1 | 0.0% |
| 171.21A1 | HM (General Requirements) - Failing to make all records and information pertaining to the incident available to an authorized representative or special agent of t | 0 | 6 | 0.0% |
| 171.22-HMGRS | HM (General Requirements) - Failing to offer a HM shipment in accordance with international HM standards/regulations as required. | 0 | 8 | 0.0% |
| 171.2A-HMGRMC | HM (General Requirements) - Motor carrier permit/require a driver to operate a motor vehicle while failing to comply with general HM requirements per regulation n | 0 | 40 | 0.0% |
| 171.2B-HMGRMC | HM (General Requirements) - Failing to comply with all applicable requirements of this subchapter, or an exemption or special permit, approval, or registration is | 0 | 209 | 0.0% |
| 171.2C | Failing to comply with Hazardous Materials regulations when offering hazardous materials for transportation | 0 | 9 | 0.0% |
| 171.2D | Accepting Hazardous Materials for transportation without registering with PHMSA | 0 | 5 | 0.0% |
| 171.2F | Transporting Hazardous Materials not in accordance with this part | 0 | 34 | 0.0% |
| 171.2G | Cargo tank (packaging) does not comply with Hazardous Materials Regulations | 0 | 3 | 0.0% |
| 171.2G-HMGRMC | HM (General Requirements) - Cargo tank (packaging) does not comply with Hazardous Materials Regulations | 0 | 57 | 0.0% |
| 171.2K | Representing vehicle with Hazardous Materials with none present | 0 | 106 | 0.0% |
| 172.201A2-HMSPS | HM (Shipping Papers) - Shipper HM shipping description on shipping paper not printed legible in English | 0 | 40 | 0.0% |
| 172.201A3 | Hazardous Materials description contains abbreviation or code | 0 | 8 | 0.0% |
| 172.201A3-HMSPS | HM (Shipping Papers) - Shipper HM shipping description on shipping paper contains unauthorized abbreviations or codes. | 0 | 20 | 0.0% |
| 172.201A4 | Additional information not after Hazardous Materials basic description | 0 | 24 | 0.0% |
| 172.201A4-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper contains additional information not following basic description as required/permitted. | 0 | 73 | 0.0% |
| 172.201C | Failure to list page number of pages | 0 | 16 | 0.0% |
| 172.201C-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper containing more than 1 page not properly numbered as required | 0 | 34 | 0.0% |
| 172.201D-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list emergency response telephone number as required | 0 | 423 | 0.0% |
| 172.202A1-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list ID number as required. | 0 | 300 | 0.0% |
| 172.202A3-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list hazard class or division number as required. | 0 | 348 | 0.0% |
| 172.202A4-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list packing group as required. | 0 | 258 | 0.0% |
| 172.202C | Total quantity missing or in improper location | 0 | 34 | 0.0% |
| 172.202C-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list total quantity of material in proper location as required. | 0 | 49 | 0.0% |
| 172.202E | Non Hazardous Material entered with class or ID# | 0 | 4 | 0.0% |
| 172.203A | DOT-SP or special permit number not entered on shipping paper | 0 | 71 | 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 ↗