Boeing 747 Internals

Boeing 747 Internals

The internals of the Boeing 747 are highlighted in these pages.

The links on the right highlight different parts of the plane.

Fuel System

The 747-400 has eight fuel tanks, with a combined capacity of 57,164 gallons of Jet-A fuel. This amount weighs in excess of 380,000 pounds. (Pilots normally discuss fuel in terms of weight rather than volume.) The distribution of fuel among these tanks has a profound effect on how the aircraft performs. In particular, during a long trip, it is important that the fuel in some tanks be burned off before using the fuel in other tanks. Otherwise, the aircraft can become unbalanced.Fuel management in the 747-400 is largely automated, but there are still certain actions that are required from the crew. We will discuss them below.


Boeing 747-400 Fuel Tank Arrangement