Media Object File Maint Hum Per Seq01

This document discusses human performance issues in aircraft maintenance. It provides an overview of human factors that can influence task performance and safety in the maintenance environment. The document includes case studies of reported maintenance events to highlight why errors occurred and how to prevent recurrences. One case study describes an event where emergency door actuators failed to operate during testing due to the percussion mechanisms not being correctly positioned and locked during maintenance. The key recommendations are to follow maintenance manual procedures closely, including illustrations, to properly reassemble components.