Final answer:
The question is about the timeframe within which a duplicate copy of FAA Form 337 must be sent to the local FAA district office after inspection. The provided information about DOT forms for animal travel is irrelevant to the student's query, and the correct timeframe should be aligned with FAA regulations.
Step-by-step explanation:
The student's question regards how soon a duplicate copy of the Federal Aviation Administration (FAA) Form 337 should be forwarded to the local FAA district office after the work is inspected. FAA Form 337 is related to major repair and alteration of aircraft. While the information provided talks about Department of Transportation (DOT) forms for animals' health, behavior, and training for airlines, this seems irrelevant to the student’s question about aviation maintenance documentation, which indicates a need for specific aviation-related knowledge. This question would typically be addressed in the context of FAA regulations, more specifically those related to aircraft maintenance records.