Aircraft records management under FAA requirements comes down to three things: carrying the right documents in the aircraft, logging every maintenance event with the information federal rules demand, and keeping the permanent records that follow the aircraft for its entire operational life. Get these right and your airplane stays legal to fly, keeps its resale value, and passes ramp checks without drama. Get them wrong and an inspector can ground the aircraft on the spot, or a buyer can knock 40% to 60% off the price at closing.
Documents That Must Be On Board
Pilots often remember the required documents by the acronym AROW: Airworthiness certificate, Registration certificate, Operating limitations, and Weight-and-balance data.
The Airworthiness Certificate must be displayed at the cabin or cockpit entrance where passengers and crew can read it.1eCFR. 14 CFR 91.203 – Civil Aircraft Certifications Required The certificate itself has no expiration date, but it only stays valid while the aircraft is properly maintained and registered in the United States. A current Registration Certificate must also be on board. The FAA charges $5 for both initial registration and renewal.2eCFR. 14 CFR Part 47 – Aircraft Registration Under a 2022 rule change, registration certificates now last seven years instead of three.3Federal Register. Increase the Duration of Aircraft Registration Let the registration lapse without renewing and the FAA can cancel it outright.
The approved flight manual or equivalent operating limitations must be available in the aircraft during flight.4eCFR. 14 CFR 91.9 – Civil Aircraft Flight Manual, Marking, and Placard Requirements These materials contain the speed limits, weight limits, emergency checklists, and performance data needed for safe operations. Current weight-and-balance data must also be on board. Any modification that changes empty weight or center of gravity requires the weight-and-balance report to be updated before the next flight.
What Every Maintenance Entry Must Contain
Every maintenance event requires a logbook entry with four specific pieces of information.5eCFR. 14 CFR 43.9 – Content, Form, and Disposition of Maintenance Records
- A description of the work, clear enough that a future mechanic can understand the scope. A reference to acceptable data, such as a manufacturer’s service manual section, can substitute for a narrative description.
- The date the work was completed, which marks when the aircraft became eligible for return to service.
- The name of the person who did the work, when that person is different from the person signing off the entry.
- The signature, certificate number, and type of certificate held by the person approving the work. This signature is the formal return-to-service approval.
That last point matters more than owners realize. The signature does not mean the airplane is broadly airworthy. It means the specific task described in that entry was completed satisfactorily. A complete maintenance history is a chain of individual entries, each signed off separately.
Annual and 100-Hour Inspections
No aircraft can legally fly unless it has received an annual inspection within the preceding 12 calendar months, performed under Part 43 and signed off by someone authorized to approve the aircraft for return to service, typically an Inspection Authorization (IA) holder.6eCFR. 14 CFR 91.409 – Inspections Aircraft used to carry passengers for hire or for flight instruction for hire also need a 100-hour inspection. The 100-hour clock can be exceeded by up to 10 hours solely to reach a place where the inspection can be done, and those extra hours count against the next 100-hour cycle.
The annual is the backbone of records management. The inspector reviews the entire maintenance history, checks AD compliance, and verifies that life-limited parts are within their limits. When the inspection is complete, the logbook entry must clearly state the aircraft was “approved for return to service” or identify the discrepancies that need correction before it can fly again. If the inspector cannot verify AD compliance from the logbooks, you may need expensive conforming inspections to prove the aircraft is airworthy.
Preventive Maintenance Owners Perform Themselves
A pilot certificate holder (other than sport pilot) who owns or operates the aircraft can perform a defined list of preventive maintenance tasks, provided the aircraft is not used under Part 121, 129, or 135.7eCFR. 14 CFR 43.3 – Persons Authorized To Perform Maintenance The approved tasks are listed in Appendix A to Part 43 and cover items like replacing tires, servicing landing gear struts, changing oil and filter elements, replacing spark plugs, swapping batteries, and replacing position light bulbs.8eCFR. Appendix A to Part 43 – Major Alterations, Major Repairs, and Preventive Maintenance Complex assembly operations do not qualify.
The catch: it still has to be logged. The entry requirements under 14 CFR ยง 43.9 apply identically whether the work was done by an A&P mechanic or by the owner in a hangar on a Saturday. Describe the work, record the date, and sign with your pilot certificate number and certificate type. Skipping the entry is one of the most common owner mistakes and creates gaps that raise red flags during annual inspections and pre-purchase audits.
Permanent Records vs. Temporary Records
Federal regulations divide aircraft records into two categories with very different retention rules.9Federal Aviation Administration. AC 43-9C – Maintenance Records
Temporary records cover routine maintenance, 100-hour inspections, annual inspections, and similar work. You keep these until the work is repeated, superseded by other work, or for one year after it was performed, whichever comes first. Once a new annual is completed and signed off, the previous annual’s records have served their purpose in the temporary category.
Permanent records stay with the aircraft for its entire operational life and must transfer to the new owner at the time of sale.10GovInfo. 14 CFR 91.417 – Maintenance Records They include:
- Total time in service for the airframe, each engine, each propeller, and each rotor.
- Current accumulated time or cycles for every life-limited component.
- Time since the last overhaul for all components with required overhaul intervals.
- Current inspection status, including the time since the last required inspection.
- Airworthiness Directive compliance records: AD number, method of compliance, revision date, and next action date for recurring ADs.
- Form 337 copies for every major alteration to the airframe and currently installed engines, propellers, and rotors.
All maintenance records must be made available for inspection by the FAA or authorized NTSB representatives on request. Ramp checks happen, and an inspector who cannot verify your records can prevent the aircraft from flying until the discrepancies are resolved.
Tracking ADs, Life-Limited Parts, and Overhauls
Airworthiness Directives are mandatory corrections the FAA issues when it identifies an unsafe condition in a particular aircraft, engine, or component design. Compliance is not optional, and the aircraft cannot legally fly until it complies.11Federal Aviation Administration. AC 39-9 – Airworthiness Directives Management Process Records must show the current compliance status of every applicable AD, including the AD number, the method used to comply, and the revision date. Recurring ADs also require recording when the next action is due.10GovInfo. 14 CFR 91.417 – Maintenance Records
Life-limited parts have a maximum service life measured in hours, cycles, or calendar time, and must be replaced before that limit regardless of apparent condition. Engine discs, certain landing gear components, and rotor hubs are common examples. Records must track each part’s serial number and accumulated life so its status against the mandatory replacement point is always clear.12GovInfo. 14 CFR 43.9 – Content, Form, and Disposition of Maintenance Records Losing track of a life-limited part is one of the fastest ways to ground an aircraft, because proving the part is within limits after the fact often requires a teardown inspection.
Records must also show the time since the last overhaul for every component with a required overhaul interval. For Part 91 private operations, manufacturer-recommended time between overhaul (TBO) limits on engines are not technically mandatory; the aircraft can legally fly past TBO as long as the engine passes its annual. Records still need to reflect accurate total time in service and time since any overhaul, because this information affects the aircraft’s value and influences the inspector’s judgment at annual. A top overhaul does not reset the time-since-major-overhaul clock, so the records should distinguish between the two.
FAA Form 337 for Major Repairs and Alterations
Whenever a major repair or major alteration is performed on the aircraft, the mechanic must complete FAA Form 337 to document exactly what was done.13Federal Aviation Administration. AC 43.9-1G – Instructions for Completion of FAA Form 337 One signed copy goes to the owner, and a duplicate must be sent to the FAA Aircraft Registration Branch within 48 hours after the work is approved for return to service.
These forms transfer with the aircraft when it is sold. If a plane has had an engine swap, an autopilot installation, or structural repairs after an incident, the Form 337 is where the details live. Missing 337s are a serious problem during pre-purchase inspections, because without them there is no way to verify that a major modification was performed properly or approved by the FAA.
Electronic Logbooks and Digital Records
Paper logbooks still work, and more owners are moving to electronic record-keeping. FAA Advisory Circular 120-78B, issued in December 2024, replaced the earlier AC 120-78A and provides the current framework for electronic signatures, digital record-keeping, and electronic manuals.14Federal Aviation Administration. AC 120-78B – Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals
The requirements for electronic signatures are more rigorous than most owners expect. Each signature must be unique to the signer, under the signer’s sole control, and attached to the record in a way that prevents the signer from denying it. Once a record is signed electronically, it cannot be edited without generating a new signature. The system needs revision control that tracks software changes and their effect on stored records.
Operators under Parts 91K, 121, 125, and 135 need specific authorization through Operations Specification A025 to use electronic signatures. Part 91 private operators have more flexibility, but the underlying principle is the same: the digital system must protect records against unauthorized access and alteration and must include reliable backup procedures. A digital logbook that crashes with no backup is worse than a paper logbook stored in a fireproof safe. Owners transitioning to electronic records should keep the original paper logbooks as well, at least until the digital system is proven.
Transferring Records When You Sell
When you sell a U.S.-registered aircraft, all required maintenance records must transfer to the buyer at the time of sale.15eCFR. 14 CFR 91.419 – Transfer of Maintenance Records That includes the permanent records above plus any temporary records still within their retention period. The buyer can agree to let the seller keep physical custody of certain temporary records, but that agreement does not relieve the buyer of the obligation to make those records available if the FAA or NTSB requests them.
Records can be transferred in plain language or in coded form, as long as the coded format preserves the information and allows it to be retrieved in a way the FAA considers acceptable. Whether the records live in physical binders or on a digital platform, the handover should happen simultaneously with delivery of the aircraft and execution of the bill of sale.
When Logbooks Go Missing
Lost or destroyed logbooks are more common than owners expect, and the financial damage is severe. Industry valuations suggest missing logbooks can reduce an aircraft’s market value by 40% to 60%, because buyers have no way to verify maintenance history, AD compliance, or component life status without them. The aircraft can still be returned to airworthy status, but the process is expensive and time-consuming.
The practical path forward starts with a thorough annual-level inspection by an A&P mechanic with Inspection Authorization. The inspector examines the aircraft and verifies compliance with every applicable AD, which may require opening up components that would normally be checked by reference to logbook entries. If the logs cannot prove an AD was complied with, the mechanic performs the AD work or the inspection needed to establish compliance from scratch. Reaching out to maintenance shops that previously worked on the aircraft can help, since many shops retain their own records that can partially reconstruct the history.
The FAA keeps copies of Form 337s filed for major repairs and alterations, so those can be recovered by requesting them from the Aircraft Registration Branch. Beyond that, the FAA does not receive copies of routine logbook entries, and there is no central backup for most of your maintenance history. Some aircraft insurance policies cover the cost of logbook reconstruction, though coverage depends on the policy language. Back up your records, store copies separately from the originals, and treat your logbooks as though they are worth a significant percentage of the aircraft’s value, because they are.