Direct Answer — What to Do When You Get an FAA LOI
An FAA Letter of Investigation (LOI) is the FAA’s written notice that it has opened an enforcement investigation into an apparent deviation. It is not a finding of violation and not a penalty. For airman-certificate investigations, the Pilot’s Bill of Rights (Public Law 112-153) requires the notice to state the nature of the investigation, to tell you that an oral or written response is not required to be submitted, to warn that any response may be used as evidence, and to inform you of the availability of air traffic data and the investigative report. The two most important first moves: (1) talk to a qualified aviation attorney before you respond, and (2) preserve and assemble — never alter — the records the letter references. The process is guided by FAA Order 2150.3C and, if it proceeds, 14 CFR Part 13; the outcome can range from no action to a compliance action, an administrative letter, a civil penalty, or certificate action, depending on the facts.
Read this before you do anything else: talk to an aviation attorney before you respond
This article explains the process and the records side so you can act calmly. It is not legal advice, and FileFlo does not represent you to the FAA. The decision whether and how to respond to an LOI is fact-specific and belongs to you and a qualified aviation attorney. The safe, productive thing you can start today — without waiving anything — is to preserve and assemble your records so counsel can review the full picture.
What an FAA Letter of Investigation Actually Is
An LOI is the document the FAA uses to formally notify you that it has opened an investigation into an apparent deviation that could lead to enforcement action. The FAA’s enforcement program is set out in FAA Order 2150.3C — that is guidance, agency policy and procedure, not a regulation, so there is no “letter of investigation” CFR section to cite. The substantive procedures that govern where the matter can go are codified separately in 14 CFR Part 13.
What an LOI is — and what it is not
It IS
- Written notice that an investigation is open
- A description of the nature of the matter being looked into
- An invitation (not a command) to provide your side
- The start of a process with rights and deadlines
It is NOT
- A finding that you violated a regulation
- A civil penalty or a certificate suspension
- A document you must answer with a statement
- Something to ignore or handle casually
People often confuse the LOI with the letters that come at the end of a matter. An LOI opens the inquiry; a Warning Notice or Letter of Correction under 14 CFR 13.11 is one possible disposition after the FAA decides a matter does not warrant formal legal enforcement. If you are not sure which letter you are holding, the fastest way to orient yourself is our side-by-side guide: FAA Letter of Correction vs Warning vs investigation. And for the bigger-picture choice the FAA is making behind the scenes — fix it with you, or sanction you — see FAA compliance action vs enforcement.
Why the FAA opened it does not change the first move
An LOI can be triggered by a ramp check, a surveillance audit, an ATC report, a complaint, an accident or incident, or a referral. Regardless of the trigger, the same two first steps apply: get aviation counsel involved, and preserve and assemble your records. The trigger matters enormously to the legal strategy — which is exactly why that part is your attorney’s job, not an article’s.
Your Rights Under the Pilot’s Bill of Rights
The Pilot’s Bill of Rights is a federal statute — Public Law 112-153, signed August 3, 2012 — not an FAA program or a CFR section. For an investigation that could lead to enforcement action against an airman certificate, it requires the FAA to provide timely written notice (the LOI) that includes specific elements. Knowing them helps you read your letter clearly — but reading them is not a substitute for legal advice.
The nature of the investigation
The notice must tell you what apparent deviation the FAA is looking into.
That a response is NOT required
The notice must inform you that an oral or written response is not required to be submitted to the FAA.
That any response may be used as evidence
The notice must advise you that any response you do submit may be used as evidence against you.
Availability of air traffic data
You are entitled to be informed of the availability of relevant air traffic data (for example, ATC communications and radar data) held by the FAA or its contractors.
Availability of the investigative report
The notice must inform you of the availability of the FAA investigative report relevant to the matter.
“Response not required” is a right, not a recommendation either way
The statute guarantees that you are not compelled to hand the FAA a narrative, and that anything you say can be used as evidence. That does not mean silence is always the right call, and it does not mean talking is. The decision is genuinely fact-specific — it turns on the regulation at issue, the strength of the FAA’s information, what your records show, and whether a voluntary safety program applies. This is precisely the judgment to put in front of an aviation attorney before you act.
The right to request air traffic data and the investigative report is one of the most practically useful parts of the statute: it lets you (through counsel) see more of what the FAA is working from before you decide how to respond. For the related airman-rights picture during a field encounter, see FAA ramp check pilot rights.
What to Do in the First Few Days
Here is a calm, ordered way to think about the opening days. None of this is legal advice — it is a sequence designed to protect your options and put your attorney in the best position. The single most time-sensitive item is the response deadline printed on your letter: read it first.
Find the deadline on the letter
The LOI states a window to respond. Read it now and calendar it. Do not let the date pass without a decision — if you need more time, an attorney can request an extension in writing before it expires.
Call a qualified aviation attorney before you respond
This is the most important step. An attorney can evaluate the facts, advise on your Pilot’s Bill of Rights protections, request the air traffic data and investigative report, decide whether and how to respond, and represent you in any informal conference or certificate action.
Preserve everything — change nothing
Secure every record connected to the flight, aircraft, crew, and timeframe in the letter. Do not edit, back-date, recreate, or “clean up” any entry. Altering or falsifying a record is its own serious violation and can be far worse than the original issue.
Assemble the records into one packet
Pull the relevant certificates, training and checking records, duty/flight-time records, maintenance and airworthiness records, dispatch paperwork, and any ASRS confirmation into a single, dated, retrievable set so counsel can see the full picture quickly.
Check whether a voluntary safety program applies
A timely NASA ASRS report (or an accepted ASAP/VDRP submission) may matter — but the rules are narrow and conditional, and best raised with counsel. Do not assume protection; confirm it.
Route all FAA contact through one channel
Decide with your attorney how the FAA will be communicated with, and keep a record of every contact. Avoid off-the-cuff phone conversations about the substance of the matter.
The one thing never to do
Do not alter, fabricate, or back-date a record to make a problem look smaller. Knowingly making a false record is its own basis for enforcement — and it converts a possible paperwork matter into a falsification matter, which the FAA treats with extreme severity. If a record genuinely needs a correction, there is a correct, transparent way to do it; see how to correct a maintenance logbook entry and FAA falsification of maintenance records.
Need the records packet in front of you fast?
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Related Aviation Compliance Guides
Where an LOI Can Lead
An LOI is the beginning of a road with several possible endings. After investigating, the FAA may take any of the following paths — which one depends heavily on the facts, your history, whether the conduct was intentional or reckless, and what your records show. (These are the formal options; consult counsel about what is realistic in your case.)
The matter is closed
After reviewing the facts, the FAA may determine that no violation occurred, or that no action is warranted, and close the investigation.
A compliance action (non-enforcement)
Under the FAA Compliance Program, an unintentional, non-reckless deviation by an operator who is willing and able to return to compliance can be handled with education, counseling, training, or process fixes — not a sanction. Your records are central evidence that you are willing and able.
Administrative action — Warning Notice or Letter of Correction
If the matter does not warrant formal legal enforcement, the FAA may issue a Warning Notice (reciting the facts and noting a possible violation) or a Letter of Correction (stating corrective action taken or agreed to).
A civil penalty (monetary)
The FAA may administratively assess a civil penalty against a business (and, for hazardous materials, against any person), under its 49 U.S.C. authority. A proposed penalty is the start of a process — there are notice, response, informal-conference, and appeal steps — not a final bill.
Certificate action — suspension, amendment, or revocation
The FAA may act against a certificate. For non-emergency actions you generally receive advance notice and a chance to respond, may request an informal conference, and may appeal to the NTSB; emergency orders take effect immediately with a limited review path.
Current civil penalty maximums (date-stamped)
Civil penalty amounts are adjusted for inflation and updated periodically, so always verify the current figure. Under 14 CFR 13.301, for the general aviation civil penalty under 49 U.S.C. 46301(a)(1), the inflation-adjusted maximums for violations occurring on or after December 30, 2024 are:
$75,000
per violation — person other than an individual or small business concern
$1,875
per violation — individual or small business concern
Source: 14 CFR 13.301 (FAA civil monetary penalty inflation adjustment table), implementing 49 U.S.C. 46301; amounts apply to violations occurring on or after December 30, 2024. Other violation categories carry different statutory maximums; confirm the current figure for your specific matter and consult counsel.
Two reads round out the enforcement picture for paperwork-driven matters: FAA fines for Part 135 paperwork violations shows how recordkeeping gaps become penalties, and the FAA crackdown on illegal “grey” charter shows the high end, where intent and operational-control evidence drive the outcome — relevant if your operation touches charter broker arrangements (14 CFR Part 295) or aircraft-management-vs-charter structures.
The Records Packet: The Part You Can Control Today
You cannot control what the FAA finds, and you should not control your legal strategy alone — that is your attorney’s domain. But you can control whether your records are complete, dated, untampered, and instantly retrievable when counsel needs them. In an enforcement matter, your records are the most objective evidence of what actually happened and of whether you run a sound operation. Here is the document set that is typically relevant.
Airman & crew
- Pilot and required-crewmember certificates
- Current medical certificate(s)
- Training, checking, and currency records
- Duty-time and flight-time records
Aircraft & airworthiness
- Airworthiness and registration records
- Maintenance entries and the status of open discrepancies
- Airworthiness Directive / inspection compliance
- Weight-and-balance and equipment lists
Operational paperwork
- Dispatch or flight-release documents
- Operational control and authorization records
- Manifests and trip paperwork for the flight at issue
- Any operating authorizations relevant to the route or operation
Safety-program & correspondence
- ASRS submission confirmation (if filed)
- ASAP / VDRP records (if applicable)
- The LOI itself and any FAA correspondence
- Prior corrective-action documentation
What you actually hand to the FAA is a decision for your attorney — the goal of assembling the packet is to let counsel see the complete, accurate picture quickly and advise from there. For the deeper mechanics of an FAA document demand, read how to handle an FAA records request during an investigation, and for the underlying obligations, see what records a Part 135 operator must keep and the aviation records retention schedule.
FileFlo: the Records Packet, Not a Law Firm
FileFlo is a compliance document intelligence platform — the proof layer for your records. It does not represent you to the FAA, respond to an LOI on your behalf, file an appeal, give legal advice, run your safety program, or guarantee any outcome. Those belong to you and to a qualified aviation attorney. What FileFlo does is keep the document set the FAA weighs — current, complete, immutable, and instantly retrievable — so that when an LOI lands, the records packet is a search away.
- Classifies and indexes aircraft, crew, training, and maintenance records so you can produce everything for a specific flight, aircraft, and timeframe in minutes
- Tracks currency and expirations so fewer deviations happen in the first place
- Preserves an immutable, version-tracked history — the integrity that keeps a record set defensible and far away from any falsification question
- Captures corrective-action documentation (root cause, completed training, verified re-entry) that evidences a willing-and-able operation
- Generates an inspector-ready, dated records index on demand, so “assemble the packet” is a button, not a scramble
FileFlo classifies 600+ document types and manages records across Part 91, Part 135, and Part 145 operators. Pricing: Starter $89/mo, Professional $299/mo. 5-day free trial, no credit card required. FileFlo keeps the documents that prove compliance audit-ready — it is not an SMS, a dispatch/flight-operations system, an attorney, or a guarantee of any FAA outcome.
Frequently Asked Questions
What is an FAA Letter of Investigation (LOI)?
An FAA Letter of Investigation (LOI) is the written notice the FAA sends when it has opened an investigation into an apparent violation that could lead to enforcement action. For investigations that could affect an airman certificate, the Pilot's Bill of Rights (Public Law 112-153, signed August 3, 2012) requires the FAA to give timely written notice that states the nature of the investigation, tells you that an oral or written response is not required to be submitted, advises you that any response you do submit may be used as evidence, and informs you of the availability of relevant air traffic data and the investigative report. The LOI is the start of a process governed by FAA enforcement guidance (FAA Order 2150.3C) and, if a matter proceeds, by 14 CFR Part 13 — it is not itself a finding of violation or a penalty.
Do I have to respond to an FAA Letter of Investigation?
Under the Pilot's Bill of Rights, the FAA's notice must tell you that an oral or written response is not required to be submitted, and that any response you do submit may be used as evidence against you. So strictly speaking you are not legally compelled to send the FAA a narrative statement. But "not required" is not the same as "do nothing," and whether and how to respond is a fact-specific legal judgment, not a do-it-yourself decision. Most aviation attorneys advise you to talk to counsel before you respond, because the right move depends on the facts, the regulation at issue, and what your records show. The one thing that is almost always wise to do early is preserve and assemble your records — counsel can decide what, if anything, to provide.
How long do I have to respond to an FAA LOI?
The response window is stated in the letter itself. FAA enforcement guidance (FAA Order 2150.3C) contemplates giving the person a reasonable opportunity to respond, and LOIs commonly specify a deadline — read your letter for the exact date and do not let it pass without a decision. If you need more time, an attorney can request an extension in writing before the deadline. Because the timeframe and the consequences of missing it are case-specific, confirm the actual deadline on your letter and consult an aviation attorney promptly — do not rely on a number you read in an article.
Should I get an aviation attorney for an FAA Letter of Investigation?
For most operators and airmen, yes — talk to a qualified aviation attorney before you respond. An LOI means the FAA has opened an enforcement investigation, and the choices you make in the first days (whether to respond, what to say, what to provide, whether a voluntary safety program applies) can shape the outcome. An attorney can evaluate the facts, advise on the Pilot's Bill of Rights protections, request the air traffic data and investigative report, prepare any response, and represent you in an informal conference or certificate action. FileFlo is not a law firm and does not give legal advice or represent you to the FAA — what it does is help you assemble the records packet your attorney will need.
What's the difference between an FAA Letter of Investigation, a Warning Notice, and a Letter of Correction?
They sit at different points in the process. A Letter of Investigation (LOI) opens an investigation — it is notice that the FAA is looking into an apparent deviation, not a result. A Warning Notice and a Letter of Correction are administrative dispositions under 14 CFR 13.11 that can come at the end of a matter the FAA decides does not warrant formal legal enforcement: a Warning Notice recites the facts and indicates the conduct may have been a violation, while a Letter of Correction states the corrective action you have taken or agreed to take. We compare all three in detail in our guide on the FAA Letter of Correction vs Warning vs investigation. The key point: an LOI is the beginning of the road, and where it ends depends heavily on the facts and on what your records show.
Can an FAA LOI lead to a certificate suspension, revocation, or civil penalty?
It can, depending on the facts — but it does not have to. After investigating, the FAA may close the matter with no action, handle it as a compliance action under the FAA Compliance Program (FAA Order 8000.373) for an unintentional, non-reckless deviation, issue an administrative Warning Notice or Letter of Correction under 14 CFR 13.11, assess a civil penalty under 14 CFR 13.16, or pursue a certificate suspension, amendment, or revocation under 14 CFR 13.19 (which carries notice-and-response rights, the option of an informal conference, and an appeal to the NTSB). For violations occurring on or after December 30, 2024, the inflation-adjusted general civil penalty maximum under 49 U.S.C. 46301(a)(1) is up to $75,000 per violation for a person other than an individual or small business, and up to $1,875 for an individual or small business concern (14 CFR 13.301). Which outcome you face is a fact-specific legal question for counsel.
Does a NASA ASRS report help if I get an FAA Letter of Investigation?
It can. Under the FAA's voluntary-reporting policy, timely filing a NASA Aviation Safety Reporting System (ASRS) report does not protect you from a finding of violation, but it can support a waiver of the civil penalty or certificate suspension for an unintentional, non-deliberate violation if the conditions are met (including that the violation was inadvertent and not deliberate, did not involve a criminal offense or accident, you had no prior similar finding in a set period, and you filed within the required time after the event). The protection is narrow and conditional, and it is most useful when the report was filed before you knew you were under investigation. Whether it applies to your situation is a legal judgment — raise it with your aviation attorney, and keep your ASRS confirmation with your records.
What records should I gather after receiving an FAA Letter of Investigation?
Start by preserving everything related to the flight, aircraft, crew, and timeframe the letter references — do not alter, recreate, or "clean up" any record, because altering or falsifying a record is its own serious violation. Typically relevant: the airman and medical certificate records at issue, training and checking records, duty and flight-time records, the aircraft's maintenance and airworthiness records and any open discrepancies, dispatch or flight-release paperwork, weight-and-balance, and any ASRS confirmation. Assemble them as a complete, dated, retrievable packet so your attorney can review the full picture quickly and decide what — if anything — to provide. This assembling-and-proving step is exactly what FileFlo is built for; deciding what to share with the FAA is your attorney's call, not ours.
An LOI tests your records. Be ready to produce and prove them.
FileFlo keeps your aviation records current, complete, immutable, and instantly retrievable, and documents corrective action — so when the FAA opens an inquiry, the records packet your attorney needs is a search away. FileFlo does not represent you to the FAA, respond to an LOI, give legal advice, or guarantee an outcome — it produces and proves your records. Starter plan $89/mo. Professional $299/mo. 5-day free trial — no credit card required.
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Written by Chad Griffith, Founder, FileFlo — compliance document intelligence. Reviewed June 15, 2026. This article is general compliance document information, not legal advice. An FAA Letter of Investigation opens an enforcement investigation governed by FAA enforcement guidance (FAA Order 2150.3C) and, where applicable, 14 CFR Part 13; the Pilot’s Bill of Rights (Public Law 112-153) is a statute that governs the notice and certain airman rights. Whether and how to respond to an LOI is fact-specific — if you have received one, consult a qualified aviation attorney before responding, and verify every regulation, penalty amount, and program reference against the current source.