Under Part 91, which records must be retained for at least one year or until the work is repeated?

Under Part 91, which records must be retained for at least one year or until the work is repeated?

• A. Records of maintenance, alterations, preventative maintenance, 100 hour, annual, and progressive inspections
• B. Weather data and flight plans
• C. Pilot medical certificates
• D. Aircraft registration documents

Answer: (A)

The rule is about keeping maintenance and inspection history to prove ongoing airworthiness. Records of work done on the aircraft—maintenance, alterations, preventive maintenance, and required inspections such as 100-hour, annual, and progressive inspections—must be retained for at least one year after the work is completed, or until the same work is repeated (the next time that type of inspection is performed), whichever comes later. This ensures there is a clear trail showing what has been done and when the next due item is. Weather data, flight plans, pilot medical certificates, and registration documents aren’t the maintenance records this rule concerns, so they aren’t kept under this specific retention requirement.

The rule is about keeping maintenance and inspection history to prove ongoing airworthiness. Records of work done on the aircraft—maintenance, alterations, preventive maintenance, and required inspections such as 100-hour, annual, and progressive inspections—must be retained for at least one year after the work is completed, or until the same work is repeated (the next time that type of inspection is performed), whichever comes later. This ensures there is a clear trail showing what has been done and when the next due item is. Weather data, flight plans, pilot medical certificates, and registration documents aren’t the maintenance records this rule concerns, so they aren’t kept under this specific retention requirement.