Aircraft Maintenance Records

FAR 43.9 Maintenance Record Entry Requirements

Updated August 26, 2026By AirLogbooks
Short answer: FAR 43.9 says a maintenance record entry must document what work was done, when it was completed, who performed it, and the signature and certificate information required for return to service.

The rule itself is not some giant mystery. The mess usually comes from inconsistency, omitted details, and the gap between the entry and the supporting records that explain what actually happened.

What the entry needs

  • A description of the work performed or reference to acceptable data.
  • The date of completion.
  • The name of the person who performed the work if required by the rule.
  • The signature, certificate number, and certificate kind for the person approving the aircraft or component for return to service when applicable.

Why structure matters

A digital system does not change the regulation. What it can do is make it harder to omit critical elements and easier for the next mechanic, owner, or inspector to review the record without guessing what the writer meant.

Where people get into trouble

Short, vague descriptions. Missing certificate information. Source documents stored somewhere else. A signed line with no obvious supporting trail. That is how trust in the record erodes.

How AirLogbooks helps

AirLogbooks is designed to capture the maintenance entry in structured fields while preserving supporting records alongside it. That does not make the user automatically compliant. It does make it easier to build cleaner records on purpose.