For how long are engineering logs maintained on board?

Engineering logs are critical documents that track the operational history, maintenance activities, and any anomalies or issues encountered during the operation of a gas turbine system. These logs provide valuable insights for ongoing maintenance and help ensure compliance with safety and operational standards.

The correct duration for retaining engineering logs is three years. This timeframe allows for adequate review and analysis of the logs for troubleshooting purposes, assessments of performance trends, and meeting regulatory audit requirements. By maintaining engineering documentation for this period, personnel can effectively address any potential issues that may arise and can substantiate maintenance practices and procedures during inspections or investigations.

The other durations listed do not align with the standard practices for log maintenance in the context of aviation and marine operations, which emphasize the importance of comprehensive records over a three-year period to adequately support both operational integrity and regulatory compliance.