393.47(d) — Brake actuators/chambers defective
FMCSA violation code under Vehicle Maintenance. 4,698 events recorded in roadside inspections. Severity weight: 7.
Violation Description
Brake actuators, chambers, or other brake components are defective or not functioning properly.
About This Violation Code
Code 393.47(d) falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 7 (scale 1-10, higher = more severe).
When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 393.47 in the Federal Motor Carrier Safety Regulations.
Top Carriers Cited
Ranked by frequency • 3,336 carriers total • Page 1 of 134
Top Carriers with 393.47(d) Violations
Showing 25 of 3,336
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | SCHNEIDER NATIONAL CARRIERS INC | 264184 | 23 |
| #2 | WESTERN EXPRESS INC | 511412 | 16 |
| #3 | UNITED PARCEL SERVICE INC | 21800 | 15 |
| #4 | TWIN CARRIER LLC | 3518735 | 11 |
| #5 | J B HUNT TRANSPORT INC | 80806 | 11 |
| #6 | 99 FREIGHT INC | 3462283 | 10 |
| #7 | SILVICOM INC | 1864495 | 8 |
| #8 | STG DRAYAGE LLC | 688143 | 7 |
| #9 | BENNETT TRUCK TRANSPORT LLC | 600382 | 7 |
| #10 | KEEN CARGO INC | 2440672 | 7 |
| #11 | CRST EXPEDITED INC | 53773 | 7 |
| #12 | STL TRUCKERS LLC | 2523551 | 6 |
| #13 | WJ TRUCKING LLC | 3539906 | 6 |
| #14 | COMMODITY TRANSPORTERS INC | 1095661 | 6 |
| #15 | MOTOR CITY LOGISTIC SERVICES LLC | 3414810 | 6 |
| #16 | WASTE MANAGEMENT OF PENNSYLVANIA INC | 344050 | 6 |
| #17 | CARRIER INCORPORATED | 2916923 | 6 |
| #18 | W & T TRAVEL SERVICES LLC | 1611127 | 5 |
| #19 | CROSKEY TRANSPORTATION LLC | 3808766 | 5 |
| #20 | STATE TRUCKING SERVICES | 1850139 | 5 |
| #21 | I&S TRANSPORTATION LLC | 3063860 | 5 |
| #22 | TRU-TRUCKING INC | 2592487 | 5 |
| #23 | VENTURE EXPRESS INC | 192068 | 5 |
| #24 | J ZENON TRUCKING INC | 2828637 | 5 |
| #25 | THOMAS IRA INMAN | 1844109 | 5 |
Recent Inspections
Latest inspections where 393.47(d) was cited • 4,698 total events • Page 1 of 188
Recent Inspections with 393.47(d)
Showing 25 of 4,698
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Oct 15, 2024 | 82911015 | NE | Level 2 | Yes |
| Oct 11, 2024 | 82901287 | TX | Level 2 | No |
| Oct 11, 2024 | 82899704 | IA | Level 1 | Yes |
| Oct 10, 2024 | 82888393 | PA | Level 1 | No |
| Oct 10, 2024 | 82888759 | TX | Level 2 | No |
| Oct 10, 2024 | 82912445 | TX | Level 2 | No |
| Oct 9, 2024 | 82867396 | AL | Level 2 | No |
| Oct 9, 2024 | 82880820 | PA | Level 1 | No |
| Oct 9, 2024 | 82868318 | NC | Level 2 | No |
| Oct 8, 2024 | 82858792 | PA | Level 1 | No |
| Oct 8, 2024 | 82867804 | NC | Level 1 | Yes |
| Oct 8, 2024 | 82859212 | PA | Level 1 | Yes |
| Oct 8, 2024 | 82900337 | TX | Level 1 | Yes |
| Oct 7, 2024 | 82871341 | TX | Level 1 | Yes |
| Oct 4, 2024 | 82851043 | CA | Level 1 | No |
| Oct 4, 2024 | 82858715 | PA | Level 2 | Yes |
| Oct 4, 2024 | 82858749 | PA | Level 1 | No |
| Oct 4, 2024 | 82859576 | TX | Level 2 | No |
| Oct 4, 2024 | 82911789 | TX | Level 1 | No |
| Oct 3, 2024 | 82849569 | TX | Level 1 | No |
| Oct 3, 2024 | 82850117 | TX | Level 2 | Yes |
| Oct 2, 2024 | 82836541 | TX | Level 1 | No |
| Oct 2, 2024 | 82836823 | TX | Level 1 | Yes |
| Oct 2, 2024 | 82827736 | TX | Level 1 | No |
| Oct 1, 2024 | 82817524 | TX | Level 1 | Yes |