Direct Answer
If your aircraft logbooks are lost or destroyed, you reconstruct the maintenance record — you do not fly until you have. FAA Advisory Circular AC 43-9D describes the accepted path: re-establish the airframe's total time in service from secondary records, rebuild the work-record history, and re-establish current status (inspections, airworthiness directives, and life-limited parts). Where research leaves gaps, the owner/operator may make a notarized statement in the new record describing the loss and the best-supported estimate of time in service.
The records exist to satisfy 14 CFR §91.417, which makes the owner/operator responsible for two kinds of records: work records (what maintenance was done, when, and who approved the return to service — §43.9 content) and status records (total time in service, life-limited-part status, AD compliance, current inspection status, and Form 337s). The status record is the permanent one that proves the aircraft's condition and must transfer with the aircraft when it is sold — and it is the one whose loss hurts most.
Reconstruction is part research and part maintenance: you dig through repair-station, mechanic, prior-owner, FAA, and component-shop records to rebuild history, and you re-establish current status — often by performing a fresh annual and working the AD list with your IA. Then you have it reviewed and coordinate with your FSDO where status cannot be verified. The deeper lesson is prevention: a complete digital backup turns the next loss into a download instead of a months-long reconstruction.
Losing the Logbooks Is a Recoverable Problem — Not a Dead Airplane
Start with the reassuring part, because the panic is real and usually worse than the situation. A lost or destroyed set of logbooks does not permanently ground an aircraft, and it does not undo the maintenance that was actually performed. The airplane is as airworthy today as it was yesterday. What changed is your ability to prove it — and in aviation, the proof is the records. The work happened, but the evidence walked out the door, and until you rebuild that evidence to an acceptable standard, no one can sign the aircraft back into service.
That distinction — airworthy in fact versus airworthy as shown — is the entire reason reconstruction exists as a recognized process. The FAA does not expect a destroyed record to be impossible to recover from; it expects the owner to do the diligent work of re-establishing the required information from the sources that remain, and to be honest and documented about what could not be recovered. The framework is laid out in FAA Advisory Circular AC 43-9D, Maintenance Records (which superseded AC 43-9C on Sept. 22, 2025; a guidance document, not a regulation), which is the FAA's explanation of how the recordkeeping rules in 14 CFR Parts 43 and 91 are met — including what to do when records are lost or destroyed.
One clarification worth making up front, because the search terms blur it: this article is about aircraft maintenance logbooks — the airframe, engine, and propeller records the owner must keep. That is different from a pilot's personal logbook, which records aeronautical experience for currency and certificate eligibility under 14 CFR §61.51 and where the rules and the recovery approach are entirely different. If you lost a pilot logbook, the stakes and the fix are not the same as a lost aircraft record. The two get mixed together constantly — see pilot logbook vs. operator records for the distinction. The rest of this guide is about the aircraft's maintenance records.
The airplane stays on the ground until status is re-established
Be clear-eyed about the operational reality: until the maintenance-record information §91.417 requires is reconstructed enough to show current inspection status, AD compliance, and life-limited-part status, a mechanic or IA has no basis to approve the aircraft for return to service. The aircraft is grounded in practice — not because it is unairworthy, but because airworthiness cannot be demonstrated. That is what makes a lost-logbook situation urgent rather than merely annoying.
What the Records Have to Prove: The Two Categories Under §91.417
You cannot reconstruct a record well until you know exactly what it is supposed to contain. 14 CFR §91.417 makes the owner/operator responsible for the maintenance records and splits them into two categories with very different stakes and retention rules. Reconstruction is the job of rebuilding both — and the second one is where the pain concentrates.
1. Work records — §91.417(a)(1)
The records of maintenance, preventive maintenance, and alterations, including inspections. Each entry must capture the §43.9 content: a description of the work performed, the date of completion, and the signature and certificate number of the person approving the return to service.
Retention (§91.417(b)(1)): kept until the work is repeated or superseded by other work, or for one year after the work is performed. These are the "rolling" records.
2. Status records — §91.417(a)(2)
The permanent picture of the aircraft's status: total time in service of airframe/engines/propellers/rotors, current status of life-limited parts, time since last overhaul, current inspection status, AD compliance (method, AD number, revision date), and copies of FAA Form 337 for major alterations.
Retention (§91.417(b)(2)): retained and transferred with the aircraft when it is sold. This is the permanent record — and the one whose loss is most damaging.
The reason the distinction matters for reconstruction is that the two categories fail differently. A one-year-old work record that is gone may simply be past its required retention — a missing entry for a routine task done two years ago is often not the crisis it feels like. But the status record never ages out: total time in service, AD compliance, and life-limited-part status have to be known now, for the aircraft to fly, and they accumulate over the aircraft's entire life. That is the record you have to rebuild with real rigor.
The entry content you are rebuilding (§43.9)
Every reconstructed maintenance entry should aim to recover the same elements §43.9 requires of an original entry. When you recover a shop invoice or a mechanic's record, you are looking for these:
For the full picture of which records a flight operation must keep and for how long, two companion guides go deeper: the §43.9 maintenance-record entry requirements and the aviation records retention schedule. Knowing which records are temporary and which are permanent is also the key to backing up the right things.
How to Reconstruct the Records, Step by Step (per AC 43-9D)
FAA AC 43-9D describes reconstruction as a research-and-re-establishment exercise anchored on total time in service. The sequence below turns that guidance into an operator's checklist. Treat it as the shape of the work — the specifics, especially for status items, belong with your IA and your FSDO.
Document the loss and stop guessing
Before anything else, write down what was lost, when you discovered it was gone, and the circumstances (fire, flood, theft, misplacement, a sale that never delivered the records). This becomes the foundation of the eventual notarized statement. From this point the aircraft generally does not fly until status is re-established — resist any temptation to "fill in" the record from memory.
Re-establish the airframe's total time in service
AC 43-9D makes total time in service the anchor of a reconstruction, because life limits, AD intervals, and inspection cycles all hang off it. Pull every secondary record that reflects time in service — shop records, prior owners’ copies, FAA filings, insurance and appraisal files — and build the best-supported figure you can.
Recover the work-record history
Reconstruct the entries describing maintenance, preventive maintenance, and alterations from recovered repair-station, mechanic, and component-shop records. The goal is to rebuild, as completely as the evidence allows, the §43.9 content — what was done, when, and who approved the return to service.
Re-establish current status — inspections, ADs, life-limited parts
This is where reconstruction becomes physical maintenance, not just research. Re-establish the current inspection status (commonly by performing a fresh annual/100-hour), confirm AD compliance for the airframe, engine, propeller, and appliances, and address life-limited-part status — verifying from records where possible and physically where necessary, with your IA.
Execute the notarized statement for what research could not close
Where diligent research leaves gaps, AC 43-9D permits the owner/operator to make a notarized statement in the new record describing the loss and establishing the best estimate of total time in service, supported by the research performed. It documents — it does not invent — and it travels with the aircraft.
Have it reviewed and coordinate with your FSDO
Have your IA or repair station review the reconstruction, and coordinate with your local FSDO where current status (especially ADs or life limits) cannot be verified from any record. Reconstruction is fact-specific; the FAA field office and, where value or liability is at stake, an aviation attorney are the right partners to confirm the result is acceptable.
Reconstruct — never fabricate
There is a bright line between rebuilding a record from real secondary evidence and inventing entries to fill a gap. The notarized statement is for documenting an honest, research-supported estimate where evidence ran out — not for manufacturing a maintenance history. Creating false entries is a serious violation of the FAA's falsification rule — 14 CFR Part 3, §3.403 (the consolidated falsification rule that, effective Nov. 3, 2025, replaced the former §43.12, which is now reserved) — and can turn a recoverable records loss into intentional misconduct. See falsification of maintenance records and, for fixing a flawed (not missing) entry, how to correct a maintenance logbook entry.
Reconstruction is half maintenance and half document hunt. See where your current records stand — and what you would be missing if they vanished tomorrow — in about two minutes.
Where the Evidence Lives: Secondary Sources for Reconstruction
The heart of a reconstruction is detective work, and AC 43-9D points to the categories of records that survive even when the physical logbooks do not. The principle is simple: the aircraft's history left a trail in other people's files. Your job is to chase down every copy of that trail and rebuild the picture from it. Here is where to look, in rough order of how much they typically recover.
Repair stations and maintenance shops
The shops that worked on the aircraft keep their own records of the work they performed. A call to every repair station and A&P/IA who touched the airplane can recover invoices, work orders, and entries that reflect both the work and the time in service it was done at. AC 43-9D points to research of repair-facility and individual-mechanic records as a primary reconstruction source.
Prior owners and operators
Previous owners often kept copies, photos, or scans of logbook pages — and the status records were supposed to transfer with the aircraft at each sale under §91.417(b). Tracing the ownership chain (the FAA registration file helps) and asking each prior owner for whatever they retained can recover large stretches of history.
FAA records and AD history
The aircraft registration file, prior Form 337s on file with the FAA, and the airworthiness-directive history for the airframe, engine, propeller, and appliances are recoverable from FAA sources and give you the spine of the status record — what major alterations were filed and which ADs apply.
Engine, propeller, and component shops
Overhaul and component shops keep records tied to serial numbers. Engine and propeller logs, overhaul records, and life-limited-part documentation can frequently be reconstructed from the shop that performed the overhaul or from the component manufacturer, anchored to the part rather than the lost book.
Avionics shops and parts vendors
Avionics installs (and their Form 337s or logbook entries), STC paperwork, and parts invoices live in vendor files. These help reconstruct equipment status and alteration history, and often carry hour or date references that corroborate time in service.
Insurance, finance, and appraisal files
Insurance applications, lender pre-buy records, and prior appraisals frequently recorded total time in service, equipment, and condition at a point in time. They are secondary, but they are dated, third-party references that help corroborate a time-in-service figure when primary records are gone.
Two practical notes about this hunt. First, be systematic and keep a log of your search — who you contacted, what they had, and what you recovered. That record of the research is exactly what supports the eventual notarized statement; the FAA's acceptance of a best-estimate time in service rests on having done diligent research, and you have to be able to show the diligence. Second, start while the trail is warm. Shops purge old files, mechanics retire, prior owners move. The closer to the loss you begin, the more you recover.
Why a reconstruction is mostly a document-finding problem
Notice what every one of those sources has in common: the information existed in a document somewhere — you simply did not have it organized and in one place. A huge share of reconstruction effort is not re-doing maintenance; it is locating, gathering, and organizing paper that was always recoverable. Owners who had kept a current digital copy of their own records skip most of this entirely — the "reconstruction" for them is opening a file.
That is the same capability that carries an operator through a records request during an investigation and a Part 135 surveillance audit: the difference between producing a record and reconstructing one.
For operators flying under Part 135, the reconstruction problem is bigger because the required record set is bigger — pilot records, training records, and operational documents on top of the maintenance records. See what records a Part 135 operator must keep and Part 135 maintenance recordkeeping and CAMP requirements for the full scope.
The cheapest reconstruction is the one you never have to do.
FileFlo keeps a complete, classified, off-aircraft digital copy of your maintenance and compliance records — each entry dated, indexed, tied to the aircraft, and instantly retrievable. A fire, flood, theft, or misplaced binder becomes an inconvenience, not the loss of your aircraft's entire provable history. And if you are reconstructing right now, FileFlo turns the pile of recovered paper into a structured, searchable record. 600+ document types. Starter at $89/mo, Professional at $299/mo. 5-day free trial, no credit card required.
Re-Establishing Current Status: The Part That Is Real Maintenance
Recovering history from old invoices is research. Re-establishing current status is maintenance — and it is the part of a reconstruction that cannot be done with paper alone. The three status items that most often have to be physically re-established are the same three that keep an aircraft legal to fly: inspection status, airworthiness-directive compliance, and life-limited-part status.
Inspection status
The cleanest way to re-anchor inspection status is to perform a fresh inspection — typically a new annual (or 100-hour, where applicable) — and document it properly. That gives you a current, dated, unambiguous inspection baseline going forward, regardless of what the lost records did or did not show. From that anchor, the recurring-inspection clock restarts on solid ground.
Airworthiness directive (AD) compliance
You and your IA work through the applicable AD list for the airframe, engine, propeller, and appliances, and confirm compliance for each. Recovered records establish compliance where they exist; where they do not, compliance may have to be verified by physical inspection or, for some ADs, re-accomplished. ADs are not optional and cannot be assumed — this is often the most time-consuming piece of a reconstruction.
Life-limited parts
Life-limited parts carry a hard retirement life, and their remaining life is part of the status record. Where the documentation of a life-limited part's history is gone and cannot be recovered from the component's own paperwork or the overhaul shop, the conservative — and frequently necessary — approach is to treat the part's life as unverified, which can mean replacement. This is precisely the kind of consequence that makes the permanent status record so valuable, and its loss so expensive.
Coordinate with your FSDO where status cannot be verified
When current status — particularly AD compliance or life-limited-part life — cannot be established from any recovered record, this is the point to involve your local Flight Standards District Office. The FAA field office can advise on what it will accept for your specific aircraft and situation, and reconstruction outcomes are fact-specific enough that doing this in coordination with the FAA (and your IA) is far safer than guessing. Where the loss also implicates value, a sale, or potential liability, bring in an aviation attorney.
Because so much of a reconstruction now lives in digital form, it is worth understanding how electronic records and digital signatures fit the rules — both for the records you rebuild and the backup you should keep. See electronic aircraft maintenance records and digital signatures, and FAA Form 337 major repair and alteration records for recovering alteration history.
The Proof Layer: Organizing a Reconstruction — and Preventing the Next One
Here is the part that matters most for an owner or operator living through this. A reconstruction succeeds when the rebuilt record is organized, dated, complete, and retrievable — not when it is a folder of recovered invoices and a stack of emails. And the entire ordeal is preventable: the owners who never have to reconstruct are simply the ones who kept a complete digital copy of their records somewhere a fire or flood could not reach.
That is a document-management capability on both ends — turning recovered paper into a structured record during a reconstruction, and keeping a continuous backup so you never need one. It is exactly the gap FileFlo is built to close. Below is the record set a reconstruction produces and protects, what each one does, and where a compliance document intelligence platform helps.
The reconstruction record set
The reconstructed work-record entries
14 CFR §§43.9, 91.417(a)(1)What it does
The rebuilt history of maintenance, preventive maintenance, and alterations — recovered from shop and mechanic records — has to be organized, dated, and complete enough to stand in for the lost originals. Loose invoices in a folder are not the same as a clean, indexed record a mechanic can rely on.
How FileFlo helps
FileFlo classifies each recovered maintenance entry and document, captures its date and the work described, and ties it to the specific aircraft, so a pile of recovered paper becomes a structured, retrievable record rather than a second shoebox.
The status records — total time, ADs, life-limited parts
14 CFR §91.417(a)(2)What it does
This is the permanent record that proves the aircraft’s status — total time in service, AD compliance, life-limited-part status, current inspection status, and Form 337s. Reconstructing it is the hard part, and once rebuilt it must be kept current and transferable for the life of the aircraft.
How FileFlo helps
FileFlo indexes the status documents as distinct, permanent record classes and tracks the recurring inspection and AD deadlines that hang off total time in service, so the status picture stays continuous after the reconstruction instead of drifting back toward gaps.
The notarized reconstruction statement
AC 43-9D (FAA guidance)What it does
The owner/operator statement that documents the loss and the best-estimate time in service is part of the permanent record and travels with the aircraft. It needs to be findable years later — at the next sale, the next pre-buy, or the next audit — alongside the research that supports it.
How FileFlo helps
FileFlo stores the reconstruction statement and the supporting evidence as a tied-together set, dated and indexed, so the story of the loss and the recovery is preserved as a unit rather than scattered or forgotten.
FAA Form 337s and alteration paperwork
14 CFR §91.417(a)(2)(vi); §43.9What it does
Copies of Form 337 for major repairs and alterations are part of the status record, and recovering them (often from the FAA file or the shop) is central to re-establishing the aircraft’s configuration and alteration history after a loss.
How FileFlo helps
FileFlo recognizes Form 337 and major repair/alteration records as their own document class and keeps them retrievable by aircraft, so the alteration history rebuilt during reconstruction stays attached to the airplane.
The complete digital backup (the real fix)
14 CFR §§43.9, 91.417 (digital permitted)What it does
The most reliable protection against ever doing a reconstruction again is a complete, current digital copy kept off the aircraft. Reconstruction is the cure; a continuous backup is the prevention — and it makes any future recovery a download instead of a manhunt.
How FileFlo helps
FileFlo is built to be that off-aircraft, always-current copy: classify and store each record as it is created, organized and dated, so a fire, flood, theft, or misplacement is an inconvenience and not the loss of the aircraft’s entire provable history.
The throughline is the same one that runs under every enforcement-adjacent situation in this cluster: the operators who do well are the ones who can produce and prove their records on demand. A missing record turns a routine maintenance question into an expensive reconstruction; a complete, organized record turns the same question into a two-minute retrieval. That difference shows up in a ramp-check document checklist, what to expect in a ramp inspection, a fine for a Part 135 paperwork violation, and the scrutiny around the FAA illegal-charter crackdown.
And if a records gap ever becomes an apparent regulatory violation, the recovery paths are their own discipline — see the VDRP voluntary-disclosure program, compliance action vs. enforcement, and ASAP vs. VDRP vs. ASRS — which to file. If an event also involves an accident, the separate mandatory regime is NTSB Part 830 accident and incident reporting and what to do for a Part 135 accident NTSB notification.
FileFlo is the proof layer — not your IA, your FSDO, or your appraiser
FileFlo is a compliance document intelligence platform. It classifies and indexes your maintenance and compliance records, dates them, ties them to the aircraft, tracks expirations on time-sensitive items, and keeps the whole set retrievable — so a reconstruction is organized and a backup is always current. It does not perform your maintenance, sign off your reconstruction, determine airworthiness, re-establish AD or life-limited-part status, set your aircraft's value, or give legal advice. That work belongs to your certificated mechanic/IA, your FSDO, an appraiser, and your attorney. What FileFlo does is make sure you can produce and prove your records — and, ideally, never lose them in the first place.
Frequently Asked Questions
What do you do if you lose your aircraft logbooks?
You reconstruct the maintenance record. Losing the physical logbooks does not ground the aircraft permanently, and it does not erase the work that was actually done — but it does put the burden on the owner to re-establish, with acceptable evidence, the information 14 CFR §91.417 requires the records to contain. FAA Advisory Circular AC 43-9D describes the accepted path: establish the airframe's total time in service from whatever secondary records exist, gather the work records you can recover, and re-establish current status — inspections, airworthiness directive (AD) compliance, and life-limited parts. Where gaps remain after diligent research, the owner/operator may make a notarized statement in the new record describing the loss and setting out the best-supported estimate of time in service. This is general compliance-document information, not legal advice — and reconstruction is fact-specific, so involve your IA or repair station and, where status cannot be verified, your FSDO.
Can you fly an aircraft without logbooks?
Not until the required maintenance-record information is re-established. The aircraft itself may still be airworthy, but airworthiness has to be shown, and the records are the evidence. Under 14 CFR §91.417 the owner/operator is responsible for keeping records of maintenance and the aircraft's current status — total time in service, life-limited parts, AD compliance, and inspection status. Without that information you generally cannot return the aircraft to service, because a mechanic or IA has no basis to approve it and you cannot demonstrate that required inspections and ADs are current. The practical reality is that the airplane stays on the ground until the record is reconstructed enough to show compliance — which is exactly why losing the logbooks is treated as an urgent recovery problem, not a paperwork inconvenience.
How do you reconstruct lost aircraft maintenance records the FAA will accept?
Per FAA AC 43-9D, the accepted approach starts with re-establishing the airframe's total time in service, because almost everything else hangs off it. You do that by pulling every secondary record that reflects time in service or completed work: prior owners' copies, repair-station and shop records, individual mechanics' records, engine and propeller manufacturer or overhaul-shop files, FAA records (the aircraft registration file and CARES/AD history), avionics-shop invoices, and even insurance and appraisal files. From those, you rebuild the work-record history and re-establish current status — last annual/100-hour inspection, AD compliance, and life-limited-part status. Where a fact cannot be documented from any source, the AC permits the owner/operator to make a notarized statement in the new record describing the loss and stating the best estimate of total time in service, supported by the research performed. Then have your IA or repair station review the reconstruction. Coordinate with your FSDO where status items cannot be verified.
How long do you have to keep aircraft maintenance records?
It depends on which of the two record categories the document falls into, under 14 CFR §91.417(b). Work records — the entries describing maintenance, preventive maintenance, and alterations — must be retained until the work is repeated or superseded by other work, or for one year after the work is performed, whichever applies. Status records — total time in service, life-limited-part status, time since last overhaul, current inspection status, AD compliance, and copies of FAA Form 337 for major alterations — must be retained and transferred with the aircraft when it is sold. That second category is the one that hurts most when it goes missing, because it is the permanent record that proves the aircraft's status, and §91.417(a)(2) requires it to be available. Understanding which records are temporary and which are permanent is also the key to backing up the right things so a loss is recoverable.
What is a logbook reconstruction letter or notarized statement?
It is the owner/operator's signed (and typically notarized) statement, placed in the new maintenance record, that documents the loss of the original records and establishes the aircraft's time in service to the best estimate supported by the research performed. FAA AC 43-9D describes this as part of reconstructing lost or destroyed records: after you have gathered every secondary record you can and re-established total time in service, the notarized statement records what was lost, the steps you took to recover information, and the resulting time-in-service figure. It is not a way to invent history — it is a documented, attested best estimate that fills the gap research could not close, and it travels with the aircraft as part of the permanent record. Because it carries legal weight and can affect future airworthiness determinations and value, many owners have it reviewed by their IA and, where appropriate, counsel.
How does missing logbooks affect aircraft value?
Significantly, and that is true even when the airplane is mechanically sound, because a buyer is paying partly for provable history. Missing or incomplete logbooks introduce uncertainty about total time in service, damage history, AD compliance, and life-limited-part status — all of which a buyer (and their pre-buy inspector) wants documented. The result is typically a discount, a harder sale, and more scrutiny on a pre-buy. Reconstruction under AC 43-9D can restore enough of the picture to make the aircraft sellable and airworthy, but a reconstructed record with a notarized time-in-service estimate is generally viewed as less complete than original, continuous logbooks. The lesson most owners take from a loss is preventive: keep a complete digital backup of the records so a fire, flood, theft, or simple misplacement is an inconvenience, not a five-figure value hit. (Valuation is a question for an aircraft appraiser, not a compliance platform.)
How do you re-establish airworthiness directive (AD) and inspection status after losing the records?
This is the hardest part of reconstruction, because current status cannot always be inferred from secondary records — sometimes it has to be physically verified or re-performed. For inspections, you generally re-establish status by performing a fresh annual (or 100-hour, as applicable) and documenting it, which gives you a clean, dated current-inspection anchor going forward. For ADs, you and your IA work through the applicable AD list for the airframe, engine, propeller, and appliances and confirm compliance — through recovered records where they exist, and through physical inspection or re-accomplishment where they do not. Life-limited parts are similar: where the record of remaining life is gone and cannot be recovered from the parts' own documentation, the conservative and often necessary path is to treat the part's history as unverified. None of this is a paperwork shortcut — it is real maintenance work, performed and documented by qualified personnel, sometimes in coordination with your FSDO.
How can you prevent losing aircraft logbooks in the first place?
Keep a complete, current digital copy of every maintenance record, off the aircraft and off any single device. The recurring theme in every lost-logbook story is that the only copy was the physical book — in the aircraft, in a hangar, or in one person's office — and a fire, flood, theft, or misplacement took the entire history with it. A disciplined backup means scanning or capturing each work-record entry and the permanent status records as they are created, storing them in a system that keeps them organized, dated, and instantly retrievable, and keeping that copy somewhere the original's fate cannot reach. Digital recordkeeping is permitted within the framework of §43.9 and §91.417 and FAA guidance on electronic records, and a continuous digital record is both your backup and the thing that makes any future reconstruction dramatically easier — because half the reconstruction work is finding documents you already had.
Reconstruct what you lost — and back up everything so you never reconstruct again.
FileFlo keeps a complete, classified, off-aircraft digital copy of your maintenance and compliance records — AI classification across 600+ document types, dated and tied to the aircraft, with expiration tracking and instant retrieval. Living through a reconstruction now? It turns recovered paper into a structured record. Want to prevent the next one? It is the backup that makes a lost binder an inconvenience, not a catastrophe. Starter at $89/mo, Professional at $299/mo. No credit card required for the 5-day free trial.
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Reviewed by Chad Griffith, Founder, FileFlo — compliance document intelligence — June 15, 2026. Maintenance-record requirements verified against the Code of Federal Regulations (Cornell LII): 14 CFR §91.417 (records the owner/operator must keep and retention periods) and §43.9 (content of maintenance entries); §61.51 governs pilot logbooks (a different record). The reconstruction approach — re-establishing total time in service, researching secondary records, and the notarized owner/operator statement — is described in FAA Advisory Circular AC 43-9D, which is FAA guidance, not a regulation. This article is general compliance-document information, not legal advice; reconstructing records and re-establishing airworthiness are fact-specific — consult a certificated mechanic/IA, your local FSDO, and, where value or liability is at stake, an aviation attorney.