Section 7 - Airframe And Systems Description - 8 - Fuel System

Question 1

What does the fuel system consist of?

Answer 1

Two integrated tanks inside torque boxes and fitted with inspection doors

Question 2

What’s the capacity of each tank?

What’s equipped with?

Answer 2

100 litres

Equipped with a vent valve (its outlet is located on the lower wing skin) and sump fitted with a drain valve for water/moisture drainage purposes

Question 3

What feeds the engine in case of engine-driven pump failure?

Answer 3

An electric fuel pump

Question 4

What’s a fuel gascolator?

Where is it located?

Answer 4

It’s a sediment-filter bowl

Located beneath the engine nacelle, between the fuel tank and the electrical pump, in correspondence of the fuel system lowest point.

It is fitted with a drain valve which allows for the overall line drainage

Question 5

Where are the fuel quantity and fuel pressure indicators for each engine?

Answer 5

Located on the RH instrument panel

Question 6

How is fuel supplied to the engines in normal conditions?

Answer 6

Each engine pump sucks fuel from the related tank

Question 7

How does crossfeed work?

Answer 7

It is allowed by fuel valves located on the front spar and controlled by Bowden cables from the fuel selectors located on the cabin over-head panel

Question 8

How do the fuel selectors work?

Answer 8

Left fuel selector manages the left engine feeding, allowing fuel supply from the left fuel tank or from the right one (using xfeed)

Right fuel selector manages the right engine feeding, allowing fuel supply from the right engine fuel tank or from the right one (xfeed)

Each selector can be set in OFF position only pulling simultaneously rotating the level; this avoids unintentional operation.

Question 9

What happens when aviation Ful Avgas 100LL is used?

Answer 9

Results in greater wear of valve seats and greater combustion deposits inside cylinders due to higher lead content.