Which SSSn would you refer to for APU emergency procedures in a crisis?

The correct reference for APU emergency procedures in a crisis is established in the technical orders and maintenance manuals that outline essential guidelines for operating the Auxiliary Power Unit. The document labeled as 49-10-03 specifically addresses emergency procedures applicable to the APU, ensuring that personnel have the right information for quick and effective responses during an emergency situation. This resource is crucial for system troubleshooting and safety protocols, emphasizing immediate actions to mitigate risks.

Other documents listed may cover various technical aspects and maintenance procedures but do not specifically focus on APU emergency protocols, which is why they are not the appropriate choice in this scenario. Recognizing the correct reference is vital for personnel who may need to act swiftly and efficiently during an emergency involving the APU.