Under 14 CFR 91.417, the aircraft maintenance records requirements split into two tiers: individual entries for each piece of work performed, and permanent status records that follow the aircraft for its entire life. The first group can be discarded once the work is repeated or after one year. The second group — total time in service, life-limited part status, time since overhaul, current inspection status, airworthiness directive compliance, and Form 337s for major alterations — must be kept for the life of the aircraft and transferred to the next owner at sale.
What Every Maintenance Entry Must Contain
Any time maintenance, preventive maintenance, or an alteration is performed, or a required or approved inspection is completed, the person doing the work must make a record entry. Each entry needs three elements: a description of the work performed, the date of completion, and the signature and certificate number of the person approving the aircraft for return to service.1eCFR. 14 CFR 91.417 – Maintenance Records
The description has to be specific enough that a later mechanic or inspector can tell what was done. “Replaced left main gear tire” works. “Performed maintenance” does not. Complex jobs can reference approved data acceptable to the Administrator, such as a manufacturer’s service bulletin, rather than restating every step.
The signature and certificate number are what create accountability. They tie the physical work to a specific licensed mechanic, repair station, or other authorized person, and the signature itself is the legal approval returning the aircraft to service. If the person who performed the hands-on work is different from the person signing off the entry, both names belong in the record.2eCFR. 14 CFR 43.9 – Content, Form, and Disposition of Maintenance Records
Records can be kept in any format that provides continuity, includes the required content, allows new entries, accommodates signatures, and is readable. Entries on FAA forms like Form 8130-3 must be in permanent ink and in English.3Federal Aviation Administration. AC 43-9D – Maintenance Records Pencil entries or non-English entries on FAA forms create compliance problems even when the technical content is accurate.
The Six Permanent Status Records
Beyond individual work entries, 91.417(a)(2) requires the owner or operator to maintain six categories of records that reflect the aircraft’s cumulative condition and legal status.1eCFR. 14 CFR 91.417 – Maintenance Records
- Total time in service for the airframe, each engine, each propeller, and each rotor.
- The current status of each life-limited part on every airframe, engine, propeller, rotor, and appliance.
- The time since the last overhaul of every item installed on the aircraft that must be overhauled on a specified time basis.
- The current inspection status, including the time since the last inspection required by the aircraft’s inspection program.
- The current status of applicable airworthiness directives, including the AD number, revision date, and the method of compliance. For any AD with a recurring action, the next due time or date.
- Copies of the forms prescribed by 14 CFR 43.9(d) for each major alteration to the airframe and currently installed engines, rotors, propellers, and appliances.
For life-limited parts specifically, the record must show the part number, serial number, and current life status — accumulated cycles, hours, or whatever measurement applies. When a life-limited part is removed, its record is updated to reflect current status, and when the part is sold or transferred, that record travels with it.4eCFR. 14 CFR 43.10 – Disposition of Life-Limited Aircraft Parts Losing track of where a life-limited part stands against its retirement limit is one of the most expensive recordkeeping failures in aviation, because the usual fix is to scrap and replace the part.
Airworthiness directive tracking is equally unforgiving. Falling behind on AD compliance is not just a paperwork problem; it can make the aircraft legally unairworthy until the record is brought current.
Retention Periods at a Glance
The retention rules track the two-tier structure. Individual maintenance and inspection entries under 91.417(a)(1) must be kept until the work is repeated or superseded by other work, or for one year after the entry was made, whichever comes first.1eCFR. 14 CFR 91.417 – Maintenance Records So the entry for an oil change stays until the next oil change; if no repeat work occurs, it stays for at least twelve months.
The six permanent status records under 91.417(a)(2) must be retained and transferred with the aircraft at the time it is sold. They stay with the aircraft for its operational life.1eCFR. 14 CFR 91.417 – Maintenance Records
A third retention rule often gets overlooked. Any list of defects furnished to the owner or operator under 14 CFR 43.11 must be kept until those defects are repaired and the aircraft is approved for return to service.5eCFR. 14 CFR 91.417 – Maintenance Records The one-year clock does not apply. A defect list stays in the file until the underlying discrepancy is cleared.
Keep short-term and long-term records physically or logically separated. Accidentally discarding a permanent status record because it was filed with routine entries is the kind of mistake that surfaces during a pre-purchase inspection or an FAA audit.
Producing Records on Request
Under 91.417(c), the owner or operator must make all required maintenance records available for inspection by the FAA Administrator or any authorized representative of the National Transportation Safety Board. Form 337 must also be presented for inspection upon request of any law enforcement officer.5eCFR. 14 CFR 91.417 – Maintenance Records
One document must physically travel with the aircraft. If a fuel tank has been installed within the passenger compartment or baggage compartment under Part 43, a copy of the Form 337 for that installation must be kept on board at all times.5eCFR. 14 CFR 91.417 – Maintenance Records That is the only situation where 91.417 requires a specific record to be in the aircraft.
For everything else, you don’t need the logbooks in the cockpit, but you do need to produce them within a reasonable time when an inspector asks. Answering a ramp check with “I think they’re in a box somewhere” is a fast path to enforcement action.
Transferring Records When the Aircraft Is Sold
All of the 91.417(a)(2) permanent status records must be transferred with the aircraft at sale.1eCFR. 14 CFR 91.417 – Maintenance Records That covers total time in service, life-limited part status, overhaul times, inspection status, AD compliance history, and every Form 337 for a major alteration. Short-term entries still within the one-year window should also go with the aircraft.
Insufficient records at transfer are a real airworthiness issue, not just a paperwork one. The FAA has stated that insufficient or nonexistent records may render the Standard Airworthiness Certificate invalid, and the aircraft may not be certificated or operated without them.6Federal Aviation Administration. AC 43-9C – Maintenance Records
When Records Are Lost or Destroyed
Fires, floods, moves, and estate transfers do happen. When records are lost, the owner has to reconstruct the aircraft’s history. Advisory Circular 43-9C describes an acceptable path.
For total time in service, the FAA accepts research using other records that reflect operating time, records maintained by repair facilities, and records kept by mechanics who previously worked on the aircraft. If the record is still incomplete, the owner may make a notarized statement in the new record describing the loss and establishing time in service based on that research and a best estimate.6Federal Aviation Administration. AC 43-9C – Maintenance Records
Reconstructing the other permanent status records is harder. The FAA acknowledges that re-establishing life-limited part status, time since overhaul, current inspection status, and the list of major alterations presents difficult problems. Establishing AD compliance may require a detailed inspection by maintenance personnel, and in some cases the AD action itself may have to be performed again to confirm compliance.6Federal Aviation Administration. AC 43-9C – Maintenance Records
Electronic and Digital Records
The FAA does not prohibit electronic records, but a computerized maintenance tracking system by itself does not automatically satisfy 14 CFR 43.9 or 91.417. The system has to capture all required information, including signatures, and meet the same content standards as paper.3Federal Aviation Administration. AC 43-9D – Maintenance Records
Electronic versions of FAA forms can be generated and stored in a secure database as long as the database contains all the information required by the form and is available for FAA review on request. The data does not need to be a graphic image of the original document, but it must be complete. When a corrected form is issued, the system must retain the original record alongside the new one; overwriting or destroying original data is not acceptable.3Federal Aviation Administration. AC 43-9D – Maintenance Records
Additional guidance on electronic signatures, electronic recordkeeping, and electronic manuals appears in Advisory Circular 120-78B, which describes acceptable methods but is not mandatory.7Federal Aviation Administration. AC 120-78B – Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals For an individual owner using an off-the-shelf logbook app, the safe approach is to keep paper backups until the digital system has been verified to capture every element the regulation requires.
Penalties for Recordkeeping Violations
Violations fall into two categories with very different consequences.
For unintentional failures such as incomplete entries, missing records, or sloppy documentation, the FAA can impose civil penalties. Individuals face civil penalties of up to $100,000 per violation, and entities other than individuals can face up to $1,200,000 per violation for offenses committed on or after the effective date of the FAA Reauthorization Act of 2024.8Office of the Law Revision Counsel. 49 USC 46301 – Civil Penalties The FAA can also suspend, revoke, or modify any certificate the violator holds, and insufficient records can render the aircraft’s Standard Airworthiness Certificate invalid.6Federal Aviation Administration. AC 43-9C – Maintenance Records
Intentional falsification is treated far more severely. The FAA has historically revoked all certificates held by a person who falsifies maintenance records, and a proposed rulemaking would apply this approach uniformly across 14 CFR.9Federal Register. Falsification, Reproduction, Alteration, Omission, or Incorrect Statements Knowingly making false entries in maintenance records that fall within federal jurisdiction is also a criminal offense under 18 U.S.C. 1001, carrying fines and up to five years of imprisonment.10Office of the Law Revision Counsel. 18 USC 1001 – Statements or Entries Generally Signing off work that was not done, logging inspections that never happened, or falsifying AD compliance can end a career and result in prison time.