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 |
|---|---|---|---|---|
| 177.804B2 | Failure to comply with 49 CFR Section 392.80 Texting While Operating a CMV when transporting select agents or toxins or HM requirement Placarding | 0 | 2 | 0.0% |
| 177.804B3 | Failure to comply with 49 CFR Section 392.82 Using a Handheld Mobile Phone While Operating a CMV when transporting select agents or toxins or HM requiring placard | 0 | 118 | 0.0% |
| 177.816-HMTMC | HM (Training) - Motor carrier failed to train driver in applicable safety and HM requirements. | 0 | 29 | 0.0% |
| 177.817E1-HMHC | HM (Highway Carriage) - Failing to clearly distinguish HM shipping papers from other papers of any kind | 0 | 1,032 | 0.0% |
| 177.817F-HMHC | HM (Highway Carriage) - Failing to retain a shipping paper copy or an electronic image thereof, that is accessible at or through its principal place of business a | 0 | 15 | 0.0% |
| 177.823A-HMPMCNP-L6-2 | HM (Placarding) - Missing required background - Highway route - controlled quantity radioactive material must have the required RADIOACTIVE warning placards pla | 0 | 2 | 0.0% |
| 177.834C | Smoking while loading or unloading Class 1, Class 3, Class 4, Class 5, or Division 2.1 Hazardous Material | 0 | 2 | 0.0% |
| 177.834H-HMHC | HM (Highway Carriage) - Failing to use precautions concerning containers in transit. | 0 | 32 | 0.0% |
| 177.834I-HMHC | HM (Highway Carriage) - Failing to comply with attendance requirements for loading/unloading. | 0 | 6 | 0.0% |
| 177.834M-HMHC | HM (Highway Carriage) - Failing to comply with loading requirements for multi-unit tank car tanks | 0 | 1 | 0.0% |
| 177.835 | Improper transportation of explosives (Class 1) | 0 | 1 | 0.0% |
| 177.835E-HMHC | HM (Highway Carriage) - Transporting sharp projections inside of vehicle transporting Class 1 material. | 0 | 1 | 0.0% |
| 177.835H-HMHC | HM (Highway Carriage) - Transporting Class 1 material in vehicle not covered and secured or tailgate closed | 0 | 1 | 0.0% |
| 177.837A-HMHC | HM (Highway Carriage) - Class 3 material may not be loaded into, or on, or unloaded from any cargo tank motor vehicle while the engine is running. | 0 | 3 | 0.0% |
| 177.839-HMHC | HM (Highway Carriage) - Improper transportation of Class 8 material. | 0 | 18 | 0.0% |
| 177.840L | No or improper Emergency Operating Procedures for cargo tanks | 0 | 22 | 0.0% |
| 177.840L-HMHC | HM (Highway Carriage) - No or improper Emergency Operating Procedures for cargo tanks | 0 | 52 | 0.0% |
| 177.840M-HMHC | HM (Highway Carriage) - Failing to perform cargo tank motor vehicle safety check prior to unloading | 0 | 1 | 0.0% |
| 177.840O | Fail to test off-truck remote shutoff device on a daily basis | 0 | 17 | 0.0% |
| 177.840O-HMHC | HM (Highway Carriage) - Failing to test off-truck remote shutoff device on a daily basis | 0 | 48 | 0.0% |
| 177.840P-HMHC | HM (Highway Carriage) - Failing to follow proper unloading procedures for liquified petroleum gas or anhydrous ammonia in metered delivery service | 0 | 1 | 0.0% |
| 177.840S | Fail to possess remote shutoff when unloading | 0 | 2 | 0.0% |
| 177.840S-HMHC | HM (Highway Carriage) - Failing to possess remote shutoff when unloading | 0 | 11 | 0.0% |
| 177.842A | Total Transport Index exceeds 50 (non-exclusive use) | 0 | 1 | 0.0% |
| 177.842B | Violation of minimum distance from RAM package to any person or animal | 0 | 1 | 0.0% |
| 177.854D-HMHC | HM (Highway Carriage) - Failing to repair damaged container as required | 0 | 5 | 0.0% |
| 178.245-5-HMP | HM (Packaging) - DOT 51 improper valve protection. | 0 | 1 | 0.0% |
| 178.245-6 | DOT51 ID plate | 0 | 3 | 0.0% |
| 178.245-6A | DOT51 name plate markings | 0 | 1 | 0.0% |
| 178.251-7B | DOT56/57 spec markings | 0 | 1 | 0.0% |
| 178.255-11-HMP | HM (Packaging) - DOT 60 tank mountings. | 0 | 1 | 0.0% |
| 178.255-14-HMP | HM (Packaging) - DOT 60 ID plate. | 0 | 1 | 0.0% |
| 178.255-1-HMP | HM (Packaging) - DOT 60 fail to comply with general requirements. | 0 | 1 | 0.0% |
| 178.255-4-HMP | HM (Packaging) - DOT 60 requirements for closures. | 0 | 1 | 0.0% |
| 178.255-7 | DOT60 valve protection | 0 | 1 | 0.0% |
| 178.270-12-HMP | HM (Packaging) - IM 101/102 requirements for valves, nozzles, piping and gauging devices | 0 | 2 | 0.0% |
| 178.270-4 | IM 101/102 Structural integrity | 0 | 1 | 0.0% |
| 178.270-6 | IM 101/102 frames | 0 | 2 | 0.0% |
| 178.270-6-HMP | HM (Packaging) - IM 101/102 requirements for tanks supports, frameworks and lifting attachments | 0 | 4 | 0.0% |
| 178.32CM | IM101/102 load securement | 0 | 3 | 0.0% |
| 178.336-9A | Safety relief devices MC330 | 0 | 20 | 0.0% |
| 178.336-9C | Marking of inlets/outlets MC330 | 0 | 1 | 0.0% |
| 178.337-10 | MC331 Accident damage protection | 0 | 2 | 0.0% |
| 178.337-10A | MC331 Protection of fittings | 0 | 3 | 0.0% |
| 178.337-10A-HMP | HM (Packaging) - MC 331 protection of fittings. | 0 | 1 | 0.0% |
| 178.337-10B-HMP | HM (Packaging) - MC 331 protection device/housing not as required. | 0 | 4 | 0.0% |
| 178.337-10C-HMP | HM (Packaging) - MC 331 rear-end tank protection. | 0 | 1 | 0.0% |
| 178.337-11A2II | Remote control <3500 gal MC331 | 0 | 1 | 0.0% |
| 178.337-17A | MC331 Metal identification plate missing | 0 | 7 | 0.0% |
| 178.337-17A-HMP | HM (Packaging) - MC 331 general marking requirements. | 0 | 29 | 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 ↗