Where can you find the correct grade of fuel and amount of engine lubricating oil for an aircraft engine?

• A. In the Type Certificate Data Sheets for the aircraft.
• B. In the Pilot's Operating Handbook.
• C. In the Aircraft Maintenance Manual.
• D. In the Minimum Equipment List.

Answer: (A)

The official certification data for an aircraft and its installed engine specifies exactly which fuels and lubricants are approved. The Type Certificate Data Sheet lists the approved fuel grade and the engine lubricant type and viscosity, along with the oil capacity. This makes it the authoritative source you’d use to confirm what to use in operation and maintenance. While the Pilot’s Operating Handbook may reference recommended fuels and oil in practical terms, and the Aircraft Maintenance Manual might cover servicing procedures, neither is the primary authority for what is officially approved by the certification basis. The Minimum Equipment List deals with equipment requirements for flight and does not define fuel or oil specifications. So, for confirming the correct grade of fuel and the amount of engine lubricating oil, the Type Certificate Data Sheet is the correct source.