What publication would a mechanic use to determine the fuel quantity and minimum octane rating for a specific aircraft?

The Type Certificate Data Sheet (TCDS) is the correct publication to determine the fuel quantity and minimum octane rating for a specific aircraft. The TCDS provides essential information about the aircraft's specifications, including approved fuel types and their minimum requirements, which is crucial for ensuring safe and efficient operation of the aircraft.

Mechanics and pilots rely on the TCDS because it serves as an official document that outlines the characteristics and limitations of the aircraft as determined by the certifying authority. This includes details on fuel requirements, which help maintain compliance with the aircraft's design specifications and support safe performance.

Other publications like the Aircraft Maintenance Manual typically focus on maintenance and repair procedures rather than operational specifications like fuel requirements. The Pilot Operating Handbook contains operational information, but it may not specify the minimum octane rating in the same detailed way as a TCDS. Service Bulletins are often used for specific maintenance issues or updates but do not provide the comprehensive fuel specifications found in a TCDS.