393.47E

393.47E Violation: Brake Out of Adjustment

A brake was recorded outside the applicable adjustment limit based on pushrod travel or another approved measurement.

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Plain-English answer

What does violation code 393.47E mean?

A brake was recorded outside the applicable adjustment limit based on pushrod travel or another approved measurement.

Why carriers pay attention

How 393.47E can affect a trucking safety record

Brake-adjustment findings can contribute to an out-of-service determination when enough brakes are defective. Review depends on brake type, chamber size, measurement method, and the position identified.

FMCSA inspection data can flow into the Safety Measurement System used to organize carrier performance into Behavior Analysis and Safety Improvement Categories, commonly called FMCSA SMS BASICs. The carrier should verify the inspection, the assigned BASIC, and whether the violation is included in the official calculation.

How it gets cited

Common 393.47E inspection situations

  • Pushrod stroke exceeds the applicable limit for the brake chamber and configuration.

  • The chamber type, size, measurement point, or wheel position is recorded incorrectly.

DataQ review

When a 393.47E violation may deserve a closer look

A DataQ challenge should identify a specific factual or legal error in the inspection data. These are review questions—not assumptions that the violation should be removed.

Potential review angles

  • The inspector applied the wrong adjustment limit for the installed chamber.
  • The measurement or cited wheel position is inconsistent with the inspection worksheet.
  • A contemporaneous remeasurement under comparable conditions contradicts the finding.

Evidence to collect

  • Brake chamber specifications and vehicle component records
  • Inspection measurements by axle and wheel position
  • Time-stamped technician remeasurement with method documented
Compliance expert review

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We'll review the violation details, identify evidence gaps, and explain whether the facts may support a DataQ challenge.

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DataQs changes in 2026

A stronger review process still requires a stronger record.

FMCSA’s 2026 DataQs overhaul adds independent review stages, decision deadlines, and more detailed explanations. Carriers still carry the burden of identifying the error and supporting the requested correction.

See the 2026 DataQs changes
Frequently asked questions

393.47E violation FAQ

What does a 393.47E violation mean?

A brake was recorded outside the applicable adjustment limit based on pushrod travel or another approved measurement.

Which FMCSA SMS BASIC is associated with 393.47E?

Code 393.47E is commonly associated with the Vehicle Maintenance BASIC in the FMCSA Safety Measurement System. Inclusion and weighting should be confirmed on the carrier’s official record.

Can a trucking company challenge a 393.47E violation?

A carrier may submit an FMCSA DataQs Request for Data Review when the underlying inspection data is incomplete or incorrect. A repair made after the inspection does not by itself prove the original 393.47E finding was wrong.

What evidence helps review a 393.47E violation?

Useful evidence may include brake chamber specifications and vehicle component records, inspection measurements by axle and wheel position, time-stamped technician remeasurement with method documented. The best evidence is tied to the cited vehicle, driver, location, and inspection time.

Keep reviewing

Related DOT violation codes

View all violation guides
393.48AInoperative or Defective BrakesBrakes396.3A1BOS20 Percent or More Defective BrakesBrakes393.45B2Brake Hose Chafing or KinkingBrakes393.9Inoperable Required LampLighting

Source references: 49 CFR 393.47 and FMCSA roadside inspection data. This guide is general information and does not guarantee a DataQs outcome or replace legal advice.