How are maintenance actions integrated into CSOSS sequences?

• A. Only via separate manuals
• B. By ignoring maintenance during operations
• C. Through maintenance steps embedded in procedures, or by separate CSOSS sequences that adjust operations during maintenance windows
• D. Maintenance actions replace live sequencing entirely

Answer: (C)

Maintenance actions in CSOSS sequences are handled by either embedding the maintenance steps directly into the standard procedures or by using separate CSOSS sequences that adjust operations during maintenance windows. This keeps maintenance tightly integrated with the operational flow, ensuring the correct order, necessary safety interlocks, and clear accountability without needing to flip to separate manuals. It also preserves operational continuity by providing a planned path for maintenance rather than ignoring it or completely replacing live sequencing. Using only separate manuals would risk divergence from the live procedures, while ignoring maintenance or replacing the live sequence altogether would undermine safety and readiness.