MRO
The maintenance records of an aircraft, kept for as long as it flies
Maintenance records
Entries are recorded as 14 CFR 43.9 and 14 CFR 43.11 require. A signed entry cannot be changed; a correction is a new entry.
Airworthiness directives
The airframe, engine, propeller and appliances on the equipment list are checked against FAA airworthiness directives and manufacturer service documents, each recorded with its method of compliance under 14 CFR 91.417.
Coming due
Inspections, directives and recurring items by date and by time in service, from the tach, Hobbs and total time recorded.
Discrepancies
A discrepancy is recorded with its corrective action and stays open until the aircraft is approved for return to service.
Original logbooks
Upload the pages of a maintenance log. They are read, and what they record is entered for review; the page stays the record.
An owner or a shop
An owner keeps their own aircraft. A shop keeps each customer and their aircraft, and a customer sees their own aircraft’s records.