Electronic logbooks and the FAA: what every pilot needs to know

The FAA addressed electronic logbooks in Advisory Circular 120-78A, which provides guidance on the acceptance and use of electronic signatures, electronic recordkeeping systems, and electronic manuals. While originally focused on air carriers, the principles apply to all certificate holders, including private pilots maintaining personal flight records.

The FAA does not require paper logbooks. 14 CFR 61.51 states that each person must "document and record" the required aeronautical experience — it does not specify the medium. The regulation uses the word "logbook" as a term of convenience, not as a mandate for a specific physical format. An electronic system that accurately records the required information and can be presented to the FAA upon request meets the regulatory requirement.

The key condition is retrievability: you must be able to present your logbook records to an FAA inspector, designated examiner, or authorized instructor when requested. This means the electronic system must be accessible — either through a device you carry or through printouts you can produce in a reasonable timeframe.

14 CFR 61.51 specifies the flight time a pilot must log to meet experience requirements and to demonstrate currency. The essential entries include:

• Date of the flight.
• Total flight time or lesson time — the duration from takeoff to landing (or hobbs/tach time per local convention).
• Location or route of flight — departure and arrival airports (using ICAO or FAA identifiers).
• Type and identification of aircraft — make/model and registration number (N-number).
• Pilot-in-command (PIC) time — logged when the pilot is sole manipulator of the controls and rated for the aircraft, or is the sole occupant, or acts as PIC under 14 CFR 61.51(e).
• Second-in-command (SIC) time — when acting as SIC in an aircraft that requires more than one pilot.
• Instrument time— actual instrument time (in IMC) and simulated instrument time (under a hood with a safety pilot). The safety pilot's name must be recorded for simulated instrument time.
• Night time — flight time between the end of evening civil twilight and the beginning of morning civil twilight.
• Training received— dual instruction from an authorized instructor, with the instructor's signature, certificate number, and expiration date.
• Instrument approaches — type, location, and number, for currency tracking under 61.57(c).

You are only required to log flight time used to meet experience requirements, currency, or recent experience. In practice, most pilots log all flights for insurance, career documentation, and personal record-keeping purposes.

AC 120-78A emphasizes that electronic recordkeeping systems must provide tamper-evidence — the ability to detect unauthorized or undocumented changes to records. This does not mean entries cannot be corrected; it means that any correction must be traceable.

A compliant electronic logbook should maintain an audit trail showing the original entry, what was changed, when it was changed, and by whom. This is analogous to crossing out an error in a paper logbook and writing the correction — the original entry remains visible. Systems that allow entries to be silently deleted or modified without a record do not meet the spirit of AC 120-78A.

For practical purposes, this means the logbook application should have version history or change tracking. If an FAA inspector reviews your records and finds discrepancies, the audit trail demonstrates that changes were corrections rather than fabrications. This is especially important for instrument currency entries, recent experience (takeoffs and landings), and flight review endorsements.

Instructors endorsing electronic logbooks should verify that the system captures their certificate number and expiration date alongside their digital signature. A simple typed name without verification data may not satisfy an examiner during a checkride review.

The biggest risk of an electronic logbook is data loss. Unlike a paper logbook that survives a dead battery, an electronic system depends on hardware, software, and cloud services that can fail. A robust backup strategy is essential:

Cloud sync: Use a logbook application that synchronizes data to a cloud server. This protects against device loss, theft, or hardware failure. Verify that the cloud service has its own backup and recovery procedures.

Regular exports: Export your logbook to CSV, PDF, or another portable format at least monthly. Store these exports in a separate location — a different cloud service, an external drive, or email them to yourself. If the logbook vendor goes out of business or discontinues the product, your exported data remains accessible.

Paper backup for critical entries: Some pilots maintain a summary paper logbook alongside their electronic records, logging totals by category (PIC, night, instrument, cross-country) periodically. This provides a verified backup that does not depend on any technology.

Endorsement preservation: Instructor endorsements (flight review, IPC, high-performance, complex, etc.) are especially critical because they may be required years after they were given. Ensure these are captured in a format that will persist — a signed PDF or photograph of the endorsement in addition to the electronic record.

Moving from a paper logbook to an electronic system requires careful data entry to avoid introducing errors into your permanent record:

Option 1 — Enter all historical flights: This provides a complete electronic record but is time-consuming. If you choose this route, enter each flight individually and cross-reference with your paper logbook. Verify totals match after entry.

Option 2 — Enter summary totals and go forward: Create a single "carry-forward" entry in your electronic logbook with your cumulative totals from the paper logbook as of a specific date. Then log all subsequent flights electronically. This is faster and less error-prone, but you lose the ability to search individual historical flights electronically.

Keep the paper logbook: Regardless of which transition method you choose, never discard your paper logbook. It remains a legal record of your flight time and endorsements. Store it in a safe, dry location. Some pilots photograph or scan every page as an additional backup.

Endorsements: All existing endorsements in your paper logbook remain valid. You do not need to have instructors re-endorse your electronic logbook for historical items. Going forward, new endorsements can be captured electronically.

Electronic logbooks offer practical advantages that paper cannot match:

Checkride preparation: An electronic logbook can instantly calculate your total time in each category — PIC, cross-country, night, instrument, and complex/high- performance. It can verify that you meet the aeronautical experience requirements for the certificate or rating you are seeking, with specific entries referenced. DPEs increasingly encounter applicants with electronic logbooks and generally accept them when presented on a tablet with summary reports available.

Currency tracking: Automatic alerts for flight review due dates, instrument currency expiration, medical certificate expiration, and night currency provide an ongoing safety net. Paper logbook pilots must manually track these dates.

Insurance applications: Renters insurance and aircraft hull/liability policies require accurate flight time totals by category. An electronic logbook produces these reports instantly, avoiding the tedious process of manually tallying a paper logbook. Some insurance underwriters specifically ask for logbook summary reports.

Searchability: Need to find every flight you made to a specific airport, in a specific aircraft, or with a specific instructor? Electronic search replaces manual page- by-page review. This is valuable when verifying currency, preparing for a checkride, or responding to an FAA inquiry.