After a ground incident causing propeller sudden stoppage, which publication should be consulted for crankshaft runout tolerance?

The most appropriate resource to consult for crankshaft runout tolerance after a ground incident that caused a propeller sudden stoppage is the current manufacturer's maintenance instructions. This document contains specific information tailored to the aircraft and its engine, including tolerances, specifications, and detailed maintenance procedures that should be followed for any repairs or inspections. These instructions are vital because they ensure that any corrective action taken aligns with the manufacturer’s standards and safety guidelines.

The other options, while related to aviation maintenance and regulations, do not provide the same level of detailed information as the current manufacturer's maintenance instructions. For example, 14 CFR Part 43 primarily outlines general maintenance regulations and standards rather than specific tolerances for individual components. The Aircraft Maintenance Manual, though comprehensive, may not always reflect the very latest updates or specific instructions from the manufacturer, while Aviation Routine Inspection Guidelines often deal with broader inspection topics rather than detailed component tolerances. Thus, consulting the current manufacturer's maintenance instructions ensures compliance with the latest data essential for safe operation.