Four levels of digital aircraft records

Organizations may operate across several levels at once. Historical paper can be scanned while new maintenance records are created electronically.

Regulatory foundation for electronic records

The FAA’s active AC 120-78B provides standards and guidance for electronic signatures, electronic recordkeeping, and electronic manuals. It describes an acceptable means, not the only means, and does not replace the underlying regulations.

The system and procedures should address:

• Who is authorized to create, sign, review, and correct records.
• How signer identity is authenticated.
• How changes are controlled and logged.
• How records remain legible, available, and reproducible.
• How retention periods are enforced.
• How backups and disaster recovery work.
• How regulators and authorized parties receive access.
• How the organization transitions into and out of the system.

Review 14 CFR 43.9, 14 CFR 43.11, 14 CFR 91.417, and the rules applicable to the operation.

The anatomy of a strong digital logbook

Original document layer

Preserve page images, born-digital files, attachments, and their original context. Do not crop away signatures, headers, handwritten notes, or adjacent entries.

Search layer

OCR and indexing should make typed and handwritten information discoverable. Search results need page previews and exact source navigation.

Structured aircraft layer

Connect dates, aircraft time, component identity, inspections, work orders, ADs, repairs, alterations, and signatures to the correct aircraft and event.

Verification layer

Show confidence, reviewer decisions, conflicts, missing periods, and the source supporting each conclusion. A corrected extracted field should not alter the original page.

Sharing layer

Create controlled views for maintenance vendors, auditors, buyers, lenders, insurers, and owners. Avoid emailing uncontrolled copies of an entire fleet archive.

Digital logbook migration plan

1. Define scope and authority. Identify aircraft, record types, operating rules, controlling originals, and decision owners.
2. Inventory the archive. Record each volume, asset, date range, condition, location, and gap.
3. Stabilize and scan. Protect fragile documents and use defined capture standards.
4. Quality-check every page. Verify completeness, order, orientation, focus, contrast, and legibility.
5. Index aircraft and components. Tag the right tail, engine, APU, propeller, and serialized assets.
6. Extract and connect. Build searchable facts and linked maintenance events.
7. Reconcile critical status. Review times, LLPs, inspections, ADs, repairs, alterations, and program evidence.
8. Establish new-record intake. Bring current shop and internal records into the system quickly.
9. Test access and recovery. Prove authorized users can retrieve and export records during normal and contingency operation.
10. Govern continuously. Monitor exceptions, access, backup, intake timing, and audit history.

The aircraft logbook digitization guide provides detailed scan acceptance criteria.

Source integrity and audit trail

A trustworthy platform distinguishes:

• Original record.
• OCR text.
• Extracted field.
• Machine-generated relationship.
• Human-reviewed conclusion.
• Corrected structured value.
• Superseded or duplicate document.

Each layer should be visible and auditable. A user should never confuse an automatically inferred date with the date visible in a signed entry.

Electronic signatures

Electronic signatures are not simply images of handwriting. Applicable systems should establish signer identity, intent, association with the record, integrity, and reproducibility.

The FAA also publishes separate guidance for digital signatures submitted to the Aircraft Registration Branch. Registration and recordation documents follow their own requirements, which should not be assumed identical to maintenance-record procedures.

Security and continuity

Digital records reduce physical-access constraints but create system risks. Evaluate:

• Encryption in transit and at rest.
• Organization and aircraft-level access.
• Multi-factor authentication.
• Audit logging.
• Secure sharing and revocation.
• Backup frequency and geographic separation.
• Recovery objectives and tested restoration.
• Vendor continuity and data export.
• Incident response.
• Protection from bulk deletion or silent alteration.

Keep contingency access for time-critical maintenance and return-to-service work.

Digital logbooks in a pre-buy or financing

A well-structured digital history can accelerate diligence because reviewers receive:

• Searchable original records.
• Current status tied to source.
• Component installation history.
• Indexed repairs, alterations, and STCs.
• Program evidence.
• Gap and exception report.
• Controlled sharing instead of duplicate data rooms.

It does not eliminate professional review. It makes the review more focused and reproducible. See the pre-buy records checklist and aircraft financing guide.

Choosing a digital aircraft logbook platform

• Can it preserve and export original records?
• Does search work on your handwritten and degraded pages?
• Can every extracted fact open to source?
• Does it model components and installation history?
• How are low-confidence and conflicting facts reviewed?
• Are changes and signatures auditable?
• Can access be scoped and revoked?
• How does backup and disaster recovery work?
• Does it connect to maintenance tracking and work orders?
• Who owns the data and what happens at contract end?

Sources and further reading

• FAA AC 120-78B, Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals
• 14 CFR 43.9, Maintenance records
• 14 CFR 91.417, Maintenance records
• FAA Aircraft Registration digital-signature guidance