TruckCodex

393.42 — Brakes - parking brake defective

FMCSA violation code under Vehicle Maintenance. 1,422 events recorded in roadside inspections. Severity weight: 6. Out-of-service eligible.

OOS Eligible
Severity Weight
6
OOS Eligible
Yes
BASIC Category
Vehicle Maintenance
Total Events
1,422
Code
393.42
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
Yes
Severity Weight
6
Violation Group
BASIC 5
Total Events
1,422
Carriers Cited
1,108

Violation Description

Commercial motor vehicle parking brake system is not adequate to hold the vehicle stationary.

About This Violation Code

Code 393.42 falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 6 (scale 1-10, higher = more severe). This violation is Out-of-Service eligible, meaning the driver or vehicle may be placed out of service at roadside when cited.

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 393.42 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
1,422
OOS Events
923
OOS Rate
64.9%
Top State (180d)
North Carolina
19 events

Top Enforcing States

Where 393.42 is most commonly cited (last 180 days)

1.North Carolina
19
OOS 94.7%
2.Illinois
11
OOS 0.0%
3.New Mexico
10
OOS 80.0%
4.Texas
9
OOS 77.8%
5.Iowa
2
OOS 0.0%
6.Kentucky
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 393.42 citations. Red bars mark months with OOS-triggering citations.

7
Apr
15
May
22
Jun
21
Jul
14
Aug
24
Sep
23
Oct
13
Nov
2
Dec
7
Jan
9
Feb
12
Mar
1
Apr

Most Active Stations

Inspection stations citing 393.42 most often (last 180 days)

1.033 - WILLIAMSVILLE - I-55 S/B
4
OOS 0.0%
2.95
4
OOS 100.0%
3.39
2
OOS 0.0%
4.HALIFAX WEIGH STATION, I-95, N
2
OOS 100.0%
5.ANTHONY PORT OF ENTRY
2
OOS 100.0%
6.US 301
2
OOS 100.0%
7.LOUISVILLE
1
OOS 100.0%
8.IL 9
1
OOS 0.0%
9.GRANVILLE COUNTY, I-85, S
1
OOS 0.0%
10.97
1
OOS 100.0%

Often Cited Together

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

396.17C8 co-occurrences393.438 co-occurrences396.3A1BOS7 co-occurrences393.96 co-occurrences396.3A15 co-occurrences392.2RG5 co-occurrences393.95A4 co-occurrences395.24C1II4 co-occurrences393.75A3 co-occurrences393.48A3 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 1,108 carriers total • Page 1 of 45

Top Carriers with 393.42 Violations

Showing 25 of 1,108

fmcsa-violations
Top Carriers with 393.42 Violations
#CarrierUSDOT# Violations
#1COCHRAN CHEMICAL COMPANY INC4881366
#2ROADHOUSE43514646
#3BROTHERLY LOVE TOWING & TRANSPORT SERVICES LLC28763246
#4TEA TRUCKING COMPANY10779916
#5DEALERS CHOICE TRUCKAWAY SYSTEM INC2551666
#6DALE MILLER ENTERPRISES INC14445545
#7SPECIALIZED TRANSPORTATION ENTERPRISES INC11961775
#8HOWARD HOUSE MOVING LLC9904395
#9M & M ANIMAL DISPOSAL LLC24531795
#10STAR FLEET TRUCKING INC4934245
#11RONNIE STALKUP19997704
#12ABEL'S PAVING & CONSTRUCTION INC33498294
#13CLASSIC TRANSPORT LLC29014484
#14CENTRAL TRANSIT SERVICES LLC44417844
#15CURB CURB LLC28695834
#16HALL UTAH TRANSPORTATION34069124
#17MILLER'S PRO-CUT INC6352084
#18BILLY BALTAZAR AGUIRRE20002134
#19COMMERCIAL CONSTRUCTION SERVICES LLC10050224
#20EAGLE HAULERS LLC11719754
#21STILES TRANSPORTATION LLC41856744
#22AID TRUCKING LLC43566264
#23FREIGHT PUNCHIN LLC40865584
#24CROSSROADS TRANSIT LLC39848744
#25BLUE HAVEN POOLS OF OKLAHOMA CITY INC14617894

Recent Inspections

Latest inspections where 393.42 was cited • 1,422 total events • Page 1 of 57

Recent Inspections with 393.42

Showing 25 of 1,422

fmcsa-inspections
Recent Inspections with 393.42
DateReport #StateLevelOOS
Apr 1, 202687486137NCLevel 1Yes
Mar 31, 202687452233KYLevel 1Yes
Mar 29, 202687465025NMLevel 2Yes
Mar 29, 202687462819NMLevel 2No
Mar 24, 202687395655NCLevel 1Yes
Mar 17, 202687322729NMLevel 2Yes
Mar 16, 202687323989TXLevel 2Yes
Mar 13, 202687291061ILLevel 1No
Mar 11, 202687274552NCLevel 1Yes
Mar 4, 202687295074NMLevel 2Yes
Mar 3, 202687214909NMLevel 2Yes
Mar 3, 202687216141TXLevel 1Yes
Feb 24, 202687128462NCLevel 2Yes
Feb 19, 202687101120ILLevel 1No
Feb 17, 202687078484ILLevel 1No
Feb 17, 202687078404ILLevel 1No
Feb 11, 202687016110NCLevel 1Yes
Feb 11, 202687016734NCLevel 1Yes
Feb 6, 202686993070NCLevel 1Yes
Feb 4, 202687066823TXLevel 2No
Feb 2, 202687007663TXLevel 2Yes
Jan 30, 202686936845NCLevel 2Yes
Jan 29, 202686923628ILLevel 1No
Jan 28, 202686914843NMLevel 1Yes
Jan 22, 202686937165NMLevel 1Yes

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Updated 3 months ago
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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