Violation code

35400(a) - 392.2DIM

Multi-axle. Semitrailer over 48 feet in length does not have a kingpin to rear axle (KPRA) measurement of 40 feet or less—392.2DIM

Unsafe Driving—Non-OOS· User submission

35400(a) - 392.2DIM is an FMCSA roadside inspection violation. It falls in the Unsafe Driving BASIC.

Violation group: —
Regulation §: —
Severity weight: —
Used in SMS: Yes
Status: Active
Updated: 6/4/2026

Last updated June 2026

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Notes

MULTI-AXLE. SEMITRAILER OVER 48 FEET IN LENGTH DOES NOT HAVE A KINGPIN TO REAR AXLE (KPRA) MEASUREMENT OF 40 FEET OR LESS - 392.2DIM - SPECIFY: V-2 KPR MEASURES 41 FT. 11 INCHES. ONE FOOT 11 INCHES OVER. OVERALL LENGTH MEASURES 74 FEET.

What 35400(a) - 392.2DIM means — and how to avoid it

In plain English

In plain terms, 35400(a) - 392.2DIM is cited for multi-axle. Semitrailer over 48 feet in length does not have a kingpin to rear axle (KPRA) measurement of 40 feet or less—392.2DIM.

What the inspector checks

•Cracked or shifted springs, broken leaves, missing U-bolts
•Loose, cracked, or missing axle positioning parts
•Air-bag leaks and shock/mount condition

How to prevent it

✓Look under the truck for shifted axles and broken/leaking suspension parts
✓Address air-leveling faults promptly
✓Include suspension in scheduled maintenance

How it affects your CSA

35400(a) - 392.2DIM counts toward the Unsafe Driving BASIC in the SMS.

General guidance from the violation’s FMCSA classification — not legal advice, and not a substitute for the inspector’s findings or 49 CFR.

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Challenging 35400(a) - 392.2DIM through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Unsafe Driving.

Common ways to challenge this code

Radar / lidar / scale calibration not produced
The state instrument used to measure speed or weight had no current calibration certificate, or one was never provided when requested.
Evidence that wins
- ✓FOIA / public-records request response from the citing agency
- ✓Calibration log expiration date if produced
- ✓Driver's contemporaneous note (e.g., independent dashcam speed)
Citation based on visual estimate only
The inspection report indicates the officer estimated speed visually rather than using a calibrated instrument.
Evidence that wins
- ✓Inspection report narrative copy showing "visual estimate" wording
- ✓Officer training records or pacing distance, if obtainable
Underlying citation adjudicated
The underlying state court adjudicated the citation as dismissed, reduced, or amended.
Evidence that wins
- ✓Certified court disposition with case number and date
- ✓Original citation copy

Common pitfalls — avoid these

⚠Submitting an uncertified court printout — DataQs requires the clerk-stamped version
⚠Forgetting that "guilty of a lesser charge" still counts as conviction — the violation may stay, just at reduced severity

⚡ Draft a challenge for 35400(a) - 392.2DIM →Read the DataQs guide first

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Frequently asked questions about 35400(a) - 392.2DIM

What does violation 35400(a) - 392.2DIM mean?

35400(a) - 392.2DIM is the FMCSA roadside-inspection violation code for "Multi-axle. Semitrailer over 48 feet in length does not have a kingpin to rear axle (KPRA) measurement of 40 feet or less—392.2DIM".

What BASIC does 35400(a) - 392.2DIM affect?

35400(a) - 392.2DIM falls under the Unsafe Driving BASIC in the FMCSA Safety Measurement System (SMS).

Is 35400(a) - 392.2DIM an out-of-service (OOS) violation?

No. 35400(a) - 392.2DIM is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 35400(a) - 392.2DIM add to a carrier's score?

The point contribution of 35400(a) - 392.2DIM depends on its severity weight multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.

How can a driver prevent 35400(a) - 392.2DIM?

Look under the truck for shifted axles and broken/leaking suspension parts; Address air-leveling faults promptly; Include suspension in scheduled maintenance.

Can 35400(a) - 392.2DIM be challenged through DataQs?

Yes. If you believe 35400(a) - 392.2DIM was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

Keep going

CSA points calculator How to challenge a violation Draft a DataQs letter for 35400(a) - 392.2DIM Unsafe Driving BASIC Carrier CSA lookup CSA glossary

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