TruckCodex

393.47A-BSF — Brake chamber - cracked/broken

FMCSA violation code under Vehicle Maintenance. 513 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
513
Code
393.47A-BSF
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
513
Carriers Cited
434

Violation Description

Brake chamber on CMV has a cracked or broken housing.

About This Violation Code

Code 393.47A-BSF falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 8 (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 393.47A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
513
OOS Events
503
OOS Rate
98.1%
Top State (180d)
California
22 events

Top Enforcing States

Where 393.47A-BSF is most commonly cited (last 180 days)

1.California
22
OOS 95.5%
2.Michigan
16
OOS 100.0%
3.Arizona
9
OOS 100.0%
4.Missouri
9
OOS 100.0%
5.Pennsylvania
7
OOS 100.0%
6.Ohio
6
OOS 100.0%
7.Wisconsin
6
OOS 100.0%
8.New York
5
OOS 100.0%
9.Tennessee
5
OOS 100.0%
10.Massachusetts
5
OOS 100.0%
11.Florida
5
OOS 100.0%
12.Wyoming
5
OOS 100.0%
13.Maine
4
OOS 100.0%
14.Colorado
4
OOS 100.0%
15.Georgia
4
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 393.47A-BSF citations. Red bars mark months with OOS-triggering citations.

17
Apr
32
May
32
Jun
39
Jul
30
Aug
22
Sep
25
Oct
26
Nov
26
Dec
32
Jan
29
Feb
27
Mar

Most Active Stations

Inspection stations citing 393.47A-BSF most often (last 180 days)

1.SAN ONOFRE IF
4
OOS 100.0%
2.LOVE PORT ENTRY
4
OOS 100.0%
3.DEDHAM
3
OOS 100.0%
4.NEWTON WI
3
OOS 100.0%
5.ST CLAIR MO
3
OOS 100.0%
6.LAREDO TX
3
OOS 100.0%
7.SYLVESTER GA
2
OOS 100.0%
8.NAPLES FL
2
OOS 100.0%
9.SEDONA AZ
2
OOS 100.0%
10.WB PERALTA SCALE
2
OOS 100.0%

Often Cited Together

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

393.75A3-TAOL18 co-occurrences393.75C-TAOTD-LT2/3212 co-occurrences396.17C-PI8 co-occurrences396.3A1-BOS7 co-occurrences393.55E-B5 co-occurrences393.45B2-B-AIR5 co-occurrences393.9A-LHLI5 co-occurrences393.9A-LTSI5 co-occurrences393.48A-BIBD4 co-occurrences393.207F-SLAS4 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 434 carriers total • Page 1 of 18

Top Carriers with 393.47A-BSF Violations

Showing 25 of 434

fmcsa-violations
Top Carriers with 393.47A-BSF Violations
#CarrierUSDOT# Violations
#1CUTTING EDGE EXCAVATING INC18817656
#2PENSKE TRUCK LEASING CO LP3275745
#3P&S TRANSPORTATION LLC12433385
#4CONSUMERS ENERGY2173214
#5GOLDEN TRIANGLE CONSTRUCTION CO INC21045744
#6CDN LOGISTICS INC7812034
#7TOWNES TRUCKING INC5955154
#8TWIN CARRIER LLC35187354
#9MFS FLEET INC9171314
#10BRANDYWINE TENT RENTAL INC9389214
#11ATS INC6069204
#121247943 ONTARIO LIMITED19714224
#13UNITED PARCEL SERVICE INC218003
#14CENTRAL TRANSPORT LLC6611733
#15TRANSNATION LLC28390373
#16SOUTHWEST FREIGHT INC28615313
#17FEDERAL EXPRESS CORPORATION868763
#18WESTERN EXPRESS INC5114123
#19KEELEY CONSTRUCTION CO INC8637223
#20ARAVAN CARGO INC31391253
#21J B HUNT TRANSPORT INC808063
#22STAN KOCH & SONS TRUCKING INC1460602
#23INTERSTATE FREIGHTS LLC24296232
#24OM SHIVA TRUCKING INC40964752
#25PECK TRANSPORT LLC8710832

Recent Inspections

Latest inspections where 393.47A-BSF was cited • 513 total events • Page 1 of 21

Recent Inspections with 393.47A-BSF

Showing 25 of 513

fmcsa-inspections
Recent Inspections with 393.47A-BSF
DateReport #StateLevelOOS
Mar 31, 202687473319COLevel 2Yes
Mar 30, 202687474027WILevel 2Yes
Mar 26, 202687421005MILevel 2Yes
Mar 24, 202687388954ALLevel 2Yes
Mar 24, 202687389058MOLevel 2Yes
Mar 21, 202687392815ARLevel 2Yes
Mar 20, 202687354110UTLevel 1Yes
Mar 19, 202687376275CALevel 1Yes
Mar 18, 202687330266MOLevel 1Yes
Mar 18, 202687330814NYLevel 1Yes
Mar 17, 202687309233SCLevel 2Yes
Mar 17, 202687323254MILevel 2Yes
Mar 16, 202687310771MALevel 2Yes
Mar 16, 202687382987VTLevel 2Yes
Mar 16, 202687302504WYLevel 2Yes
Mar 15, 202687306892MOLevel 1Yes
Mar 13, 202687339231MNLevel 1Yes
Mar 11, 202687277077CALevel 1Yes
Mar 9, 202687255572CALevel 3No
Mar 9, 202687259317COLevel 2Yes
Mar 6, 202687279322NYLevel 2Yes
Mar 6, 202687239127GALevel 1Yes
Mar 3, 202687291762NVLevel 2Yes
Feb 27, 202687173964PALevel 1Yes
Feb 27, 202687184341CALevel 2Yes

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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