Which manual contains general information on the aircraft, including dimensions and specifications?

The correct choice is the GAI-000 manual because it serves as the general aircraft information manual that provides extensive details about the aircraft, including dimensions, specifications, and overall capabilities. This resource is crucial for anyone involved with the aircraft maintenance or operation, as it consolidates essential information needed for an effective understanding of the aircraft's physical and performance characteristics.

The other manuals have specific functions that do not cover the comprehensive overview provided by the GAI-000. For instance, LMM-020 typically focuses on maintenance practices rather than general aircraft specifications. The 80T-105 is centered around training and operational practices and does not encompass general information like dimensions. NA 01-1A-509 is primarily a reference for various technical data but does not serve as the main source for overall general information relating to the aircraft's specifications. Each of these manuals has its role but does not provide the broad and detailed overview found in the GAI-000.