FMCSA Investigation Types

FMCSA has multiple levels of carrier oversight. Each has a different trigger, scope, and consequence. This skill distinguishes them.

1. New Entrant Safety Audit (NESA) — 49 CFR 385 Subpart D

Trigger: All new carriers within 18 months of authority. Scope: Sample-based — basic D&A program, sample DQF, sample HOS, vehicle maintenance basics, carrier registration currency. Outcome: Pass = permanent authority; Fail = 60-day remediation OR lose authority.

See the new-entrant-safety-audit-prep skill for details.

2. Compliance Review (CR) — 49 CFR 385 Subpart B

Trigger: Generally triggered by:

Poor CSA scores (BASIC above intervention threshold)
A serious crash
A complaint
Random selection
A previous CR Conditional rating

Scope: Comprehensive — auditor reviews ALL drivers' DQFs, ALL vehicles' maintenance records, 6+ months of ELD/HOS records, D&A program, insurance + authority docs.

Outcome: Safety rating issued:

Satisfactory — No significant deficiencies
Conditional — Some deficiencies; can continue operating but should remediate
Unsatisfactory — Major deficiencies; 45-60 days to fix or lose authority

On-site or off-site: Typically on-site. May be off-site for limited reviews. Duration: 1-5 days at the carrier's office. Frequency: Reactive (when triggered), not scheduled.

3. Focused Investigation

Trigger: Specific concern triggered by:

A specific crash (DOT-recordable, fatality)
A targeted complaint
One specific BASIC scoring high
A single regulatory area concern (e.g., HOS violations from ELD data)

Scope: Narrower than CR — focuses on the specific issue area:

Focused on Hours of Service if HOS BASIC high
Focused on Vehicle Maintenance if VM BASIC high
Focused on D&A if Controlled Substances BASIC high

Outcome: Findings letter + corrective action plan; safety rating may be adjusted but typically not changed.

On-site or off-site: Often off-site (records submitted electronically); can be on-site.

4. Off-Site Investigation

Trigger: Lower-risk concern OR initial follow-up to a Focused Investigation. Scope: Records-only review; auditor doesn't physically visit. Outcome: Findings + correction.

5. Comprehensive Review

Trigger: Most serious — typically:

A pattern of violations across multiple BASICs
A previous Unsatisfactory rating
Major safety incident (multi-fatality crash, hazmat release)
Reportable issue surfacing in CSA data

Scope: Most comprehensive of any review type. May include:

Multiple on-site days
All drivers' DQFs
All vehicles' maintenance records
12+ months of ELD/HOS records
Insurance review
Operating authority review
D&A program full review

Outcome: Safety rating with broad implications. Possible:

Order to Cease Operations
Civil penalties
Criminal referral (rare)

6. State-Level Audits (separate from FMCSA)

States can perform their own audits for intrastate carriers + state-specific concerns:

California BIT (Basic Inspection of Terminals) — yearly state inspection
Texas Railroad Commission oversight — oil/gas-specific
State PUC audits — for intrastate authority holders
State Workers Comp audits — for worker classification

State + federal audits can run simultaneously.

How to know which is coming

When you receive an audit notification, check:

Letter type	Investigation Level
"Notice of New Entrant Safety Audit"	NESA
"Notice of Compliance Review"	Full CR
"Notice of Focused Investigation"	Focused
"Notice of Off-Site Investigation"	Off-Site
"Notice of Comprehensive Review"	Comprehensive
"Notice of Compliance Investigation"	Investigation (typically Comprehensive scope)

The notification will specify:

Type of review
Scope (specific BASICs or all)
Records requested
On-site dates OR submission deadline
Auditor name + contact

Preparation by investigation type

For NESA:

See new-entrant-safety-audit-prep skill
~90 days self-audit
Document everything

For Focused (HOS):

Pull last 6-12 months of ELD records
Identify any violations + remediation
Compile supporting documentation (BOL, dispatch records)
Driver training documentation

For Focused (Vehicle Maintenance):

DVIRs (last 12 months)
Annual inspection certificates
Repair orders + invoices
PM schedule + completion records

For Focused (D&A):

D&A program written policy
Random testing pool + selection log
Test results (separate file)
MRO + SAP records
Clearinghouse query records
Supervisor reasonable-suspicion training records

For Comprehensive Review:

Everything above + insurance + operating authority
Driver list with hire dates
Vehicle list with annual inspection dates
Last 12-24 months of CSA scoring + interventions
100% DQF sample readiness

On-site investigation logistics

When FMCSA visits:

Provide a quiet workspace + Wi-Fi
Designate a single point of contact (typically safety manager)
Schedule available staff (safety mgr, ops mgr, driver mgr if available)
Have documents accessible (paper + digital)
Don't volunteer information; answer what's asked
Take notes on what's being reviewed
Disagree professionally but document

After the investigation

Within ~30 days, FMCSA sends:

Findings letter — what was found + classification
Notice of Claim if civil penalties proposed
Conditional or Unsatisfactory rating if applicable
Corrective Action Plan request if applicable

Carrier has:

60 days to request a Safety Rating upgrade (if Conditional)
60 days to contest findings via formal appeal
30 days to submit corrective action plans
30 days to pay civil penalties OR contest

Penalties by investigation outcome

Outcome	Penalty Range
Focused with minor findings	Warning letter; no civil penalty
Focused with significant findings	$5K-$50K civil penalties
CR with Satisfactory rating	None
CR with Conditional rating	Reputation hit; possible insurance/customer impact
CR with Unsatisfactory	$25K-$300K civil penalties + authority threatened
Comprehensive with major findings	$50K-$500K+ civil penalties + criminal referral possible
Egregious / Repeat offender	Multi-million civil penalties + authority revoked

Common investigation mistakes

Ignoring the notification. Schedule on-site visits as soon as possible.
Not preparing for the specific type. Focused HOS = bring HOS records, not everything.
Volunteering information. Stick to the questions.
Arguing instead of documenting. Disagreements go in writing; civil tone preserved.
Not consulting an attorney for major investigations. Comprehensive review = engage counsel early.
Failing to submit corrective action plan. Loses ability to upgrade rating.

Where this fits in X3

X3's audit-export.html page assembles audit-ready packages tailored to investigation type. The agent-pre-dot-audit-prep Edge Function runs self-audits in advance. Mike Perry (X3's senior safety advisor) consults on Compliance Review prep + Unsatisfactory rating remediation.

When asked about an upcoming audit, walk the user through:

What type of investigation (letter type)?
What's the specific scope?
What's the timeline?
What records need to be prepared?

Built by X3 Compass

The AI-powered DOT compliance platform for fleets 1–100 power units. Try a 7-day free trial — no credit card required — at https://x3compass.com/?utm_source=skill&utm_medium=github&utm_campaign=dot-investigation-types

X3 Compass turns these skills into a complete operational platform: driver qualification files, drug & alcohol consortium, MVR pulls, hours-of-service tracking, hazmat shipping, IFTA filing, FMCSA audit prep, and DataQ dispute drafting — all CFR-cited, all in one place.

This skill is published under the X3 Compass open skills initiative. Contributions welcome at https://github.com/x3fleetsafety/skills

dot-investigation-types

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SKILL.mdskills/dot-investigation-types/SKILL.md