TruckCodex

393.47B — Brake actuators/chambers defective

FMCSA violation code under Vehicle Maintenance. 1,762 events recorded in roadside inspections. Severity weight: 7.

Severity Weight
7
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
1,762
Code
393.47B
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
7
Violation Group
—
Total Events
1,762
Carriers Cited
1,562

Violation Description

Brake actuators, chambers, or other brake components are defective or not functioning properly.

About This Violation Code

Code 393.47B 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 393.47B in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
1,762
OOS Events
1,508
OOS Rate
85.6%
Top State (180d)
Texas
518 events

Top Enforcing States

Where 393.47B is most commonly cited (last 180 days)

1.Texas
518
OOS 84.9%
2.New Mexico
15
OOS 100.0%
3.Illinois
5
OOS 80.0%
4.North Carolina
5
OOS 60.0%
5.Iowa
1
OOS 100.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.47B citations. Red bars mark months with OOS-triggering citations.

48
Apr
114
May
102
Jun
100
Jul
92
Aug
100
Sep
110
Oct
104
Nov
82
Dec
94
Jan
116
Feb
95
Mar
1
Apr

Most Active Stations

Inspection stations citing 393.47B most often (last 180 days)

1.COLUMBIA POE
15
OOS 66.7%
2.US77 RIVIERA SCALE
11
OOS 72.7%
3.PHARR POE
10
OOS 70.0%
4.INDIOS POE
9
OOS 66.7%
5.US281 SB FALFURRIAS SCALE
7
OOS 100.0%
6.LORDSBURG PORT OF ENTRY
7
OOS 100.0%
7.TX302 MENTONE SCALE
6
OOS 100.0%
8.IH35 SB DEVINE SCALE
6
OOS 100.0%
9.IH35 NB DEVINE SCALE
6
OOS 100.0%
10.IH-0030 IN DALLAS CO. (32-64)
5
OOS 100.0%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

393.9164 co-occurrences393.47E136 co-occurrences393.53B74 co-occurrences393.45B2UV67 co-occurrences393.7865 co-occurrences392.2RG64 co-occurrences396.3A1BOS63 co-occurrences396.17C62 co-occurrences396.3A159 co-occurrences392.2W50 co-occurrences

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 1,562 carriers total • Page 1 of 63

Top Carriers with 393.47B Violations

Showing 25 of 1,562

fmcsa-violations
Top Carriers with 393.47B Violations
#CarrierUSDOT# Violations
#1JORGE ANTONIO SEPULVEDA24727395
#2W W ROWLAND TRUCKING COMPANY LLC2136415
#3GULF WINDS INTERNATIONAL INC6901475
#4FREIGHT SOLUTIONS LLC21491614
#5QFS TRANSPORTATION LLC22447174
#6NATIONAL DRAYAGE SERVICES DE LLC17470934
#7INOCENTE RIOS ALVARADO35484854
#8PROGRESS TRUCKING LLC 129422614
#9BFI WASTE SERVICES OF TEXAS LP9620854
#10IRON BIRD TRUCKING LLC44667484
#11OK SERVICES LLC36750623
#12LEQ TRANSPORT LLC21995163
#13MAX CARGO LLC30551223
#14EDIBERTO RODRIGUEZ25378593
#15J & P GONZALEZ LLC25314973
#16GONCO LOGISTICS LLC30573623
#17TRANSPORTE INTERNACIONAL JONICK LOPEZ SA DE CV8209813
#18EVANS DELIVERY COMPANY INC381113
#19FLYING EAGLE OILFIELD SERVICES LLC35245123
#20CONTAINERPORT GROUP INC2327343
#21ROWDY TRANSPORT LLC28419693
#22KINGAR TRANSPORT SA DE CV36428823
#23DX XPRESS INC21280193
#24ALAMO TRANSIT COMPANY19418983
#25EVERETT KEITH WILLIAMS41092833

Recent Inspections

Latest inspections where 393.47B was cited • 1,762 total events • Page 1 of 71

Recent Inspections with 393.47B

Showing 25 of 1,762

fmcsa-inspections
Recent Inspections with 393.47B
DateReport #StateLevelOOS
Apr 1, 202687487134TXLevel 1Yes
Mar 31, 202687479027TXLevel 2Yes
Mar 31, 202687488258TXLevel 2Yes
Mar 31, 202687487292TXLevel 2Yes
Mar 31, 202687487216TXLevel 2Yes
Mar 31, 202687479358TXLevel 1Yes
Mar 30, 202687463068NMLevel 1Yes
Mar 30, 202687468554TXLevel 2Yes
Mar 30, 202687468538TXLevel 2Yes
Mar 29, 202687467870TXLevel 2Yes
Mar 28, 202687443331TXLevel 1No
Mar 27, 202687466920TXLevel 2Yes
Mar 26, 202687487978TXLevel 2Yes
Mar 26, 202687424253TXLevel 2Yes
Mar 26, 202687466629TXLevel 2Yes
Mar 26, 202687467994TXLevel 2Yes
Mar 26, 202687487924TXLevel 2Yes
Mar 25, 202687440970TXLevel 1No
Mar 25, 202687410841TXLevel 2Yes
Mar 25, 202687442644TXLevel 1Yes
Mar 25, 202687466181TXLevel 2Yes
Mar 25, 202687423760TXLevel 2Yes
Mar 24, 202687409693TXLevel 2Yes
Mar 24, 202687409706TXLevel 2Yes
Mar 24, 202687409802TXLevel 1No

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Unknown freshness
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness

Related records

CategoryAll Vehicle Maintenance Violations
Browse all violation codes in the Vehicle Maintenance BASIC
IndexAll Violation Codes
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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