haulrecordFMCSA data

Violation codes / 393.47A

49 CFR 393 · Parts and accessories

393.47A

What it means

Inadequate brakes for safe stopping - Brake Lining condition

What the rule actually says

This violation cites 49 CFR 393.47, brake actuators, slack adjusters, linings/pads and drums/rotors. The regulation reads:

(a) General requirements. Brake components must be constructed, installed and maintained to prevent excessive fading and grabbing. The means of attachment and physical characteristics must provide for safe and reliable stopping of the commercial motor vehicle.

(b) Brake chambers. The service brake chambers and spring brake chambers on each end of an axle must be the same size.

(c) Slack adjusters. The effective length of the slack adjuster on each end of an axle must be the same.

(d) Linings and pads. The thickness of the brake linings or pads shall meet the applicable requirements of this paragraph—

(1) Steering axl…

The section continues.

49 CFR 393.47, Brake actuators, slack adjusters, linings/pads and drums/rotors. Read the full section on eCFR

Quoted verbatim from the Electronic Code of Federal Regulations. Nothing here is a paraphrase, and nothing here is legal advice on a citation.

Times recorded26,9616% as often as 393.9, the most cited
How common129thof the 200 most cited codes, out of 2,372 that exist
Regulation393.47Parts and accessories

How often this comes up

This violation was recorded 26,961 times across the roadside inspections in the FMCSA file, making it the 129th most frequently cited code. Whether a given instance puts a vehicle or driver out of service is decided at the roadside by the inspector, not by the code itself, so the same violation can end a trip or simply be noted.

It sits under 49 CFR Part 393, which covers parts and accessories. To see it in context, look up a carrier and read its inspection history: the same code appearing repeatedly is a different signal from a single occurrence.

Look up a carrier's inspection record

Other parts and accessories violations

Counts are from the FMCSA Inspections and Violations file via data.transportation.gov. This describes how the violation is recorded, and is not legal advice on a citation.