Which document is associated with the APU emergency shut down?

The document associated with the APU emergency shut down is indeed 49-10-03. This specific document provides guidance and procedures related to the Auxiliary Power Unit (APU) operations, including emergency shut down protocols. Understanding the procedures outlined in this document is crucial for ensuring the safety and efficiency of APU operations in various scenarios, particularly during emergencies when swift and decisive action is required. The detailed instructions within 49-10-03 help personnel handle any irregularities or hazards that may arise during APU operation, making it an essential reference for both ground and flight crews.

Other documents, while they may address different systems or aspects of the aircraft, do not specifically focus on the emergency procedures related to the APU. Hence, they are not suitable references for this particular need.