What document specifies the placards required on an aircraft?

The document that specifies the placards required on an aircraft is the Type Certificate Data Sheets. This document provides essential information about the aircraft, including specifications and limitations that must be followed for safe operation. It includes details such as weight and balance data, engine information, and placard requirements.

The placards are critical as they provide necessary information for the pilot and for anyone operating or maintaining the aircraft. They ensure that key safety information, operational limits, and instructions are visible and accessible, promoting safety and compliance with regulations.

While Aircraft Specifications may contain some information about the aircraft, it is not the definitive source for the required placards. Similarly, the Certification Manual deals more with the process and standards under which aircraft are certified and does not list specific placard requirements. The Pilot's Operating Handbook provides operational information relevant to flight and handling but does not specifically specify placard requirements mandated by regulations. Therefore, the Type Certificate Data Sheets is the authoritative source for placards required on an aircraft.