Which information is essential in maintenance logs to support accountability and traceability?

• A. Maintenance actions performed and the responsible technician.
• B. Date and time only.
• C. Fault codes, configuration changes, and actions taken.
• D. No information.

Answer: (C)

Capturing fault codes, configuration changes, and actions taken provides a complete, auditable trail of maintenance. Fault codes link the issue to its diagnostic cause, configuration changes show exactly how the system was altered and what state it was put into, and the actions taken describe the remediation steps performed. Together, they let you trace from the original problem through to the resolved state, support accountability (who did what and when) and ensure traceability for future troubleshooting, safety reviews, and compliance. The other options miss one or more of these essential elements, leaving gaps in the record that could hinder root-cause analysis and verification of proper procedures.