Which item is NOT considered approved data for maintenance activities?

Which item is NOT considered approved data for maintenance activities?

• A. Airworthiness Directives
• B. Type Certificate Data Sheets
• C. Maintenance logs
• D. Advisory Circulars

Answer: (C)

Approved data are the official sources used to determine how maintenance must be performed and what standards apply. Airworthiness Directives impose mandatory actions to address safety issues. Type Certificate Data Sheets describe the aircraft’s approved design and the baseline requirements for its systems and airworthiness. Advisory Circulars provide FAA-approved guidance on acceptable methods to comply with regulations. Maintenance logs, in contrast, are records that show what work has been completed; they document compliance but do not supply the approved procedures or standards for maintenance. Because of that, maintenance logs are not considered approved data for maintenance activities.

Approved data are the official sources used to determine how maintenance must be performed and what standards apply. Airworthiness Directives impose mandatory actions to address safety issues. Type Certificate Data Sheets describe the aircraft’s approved design and the baseline requirements for its systems and airworthiness. Advisory Circulars provide FAA-approved guidance on acceptable methods to comply with regulations. Maintenance logs, in contrast, are records that show what work has been completed; they document compliance but do not supply the approved procedures or standards for maintenance. Because of that, maintenance logs are not considered approved data for maintenance activities.