Engine and Associated Systems

Question 1

What kind of engine does the DA40 have?

Answer 1

A Lycoming IO-360-M1A

Question 2

Describe the basics of the engine

Answer 2

An air cooled four-cylinder four-stroke direct drive engine that is horizontally opposed and fuel injected

Question 3

What does horizontally opposed mean?

Answer 3

The cylinders are located on each side of the crankshaft

Question 4

What is the maximum HP at sea level and standard atmospheric conditions?

Answer 4

180HP at 2700 RPM

Question 5

On the right side of the cowling, what does the airflow help with?

Answer 5

Cylinder head cooling, alternator & battery cooling, oil cooling, and cabin heating

Question 6

What kind of fuel pumps does the aircraft have?

Answer 6

Both mechanical and electric fuel pumps

Question 7

When should each fuel pump be used?

Answer 7

The mechanical pump is used for fuel supply during normal operations. The electric fuel pump is pilot controlled using a switch and should be turned on during engine start, takeoff & landing, and when switching fuel tanks

Question 8

Describe the fuel selector

Answer 8

The selector is used to choose a fuel tank. It has 3 positions: Left, Right, and Off. Off is reached by turning the selector to the right while simultaneously pulling up the safety catch.

Question 9

How are standard fuel tanks constructed?

Answer 9

Each standard fuel tank has a total of two aluminum chambers connected by flexible hose and dual vent hoses

Question 10

What is the maximum fuel quantity for each standard tank?

Answer 10

20 US gallons

Question 11

What is the maximum difference allowed between each standard tank?

Answer 11

10 US gallons

Question 12

What is the maximum quantity of fuel that can be shown on the indicators for a standard tank?

Answer 12

17 US gallons

Question 13

How can you determine the exact quantity of fuel if there’s more than 17 US gallons in a standard tank?

Answer 13

A fuel measuring device

Question 14

Describe the long range fuel tank construction

Answer 14

Each long range tank has 3 aluminum chambers, all connected by pieces of flexible hose and dual vent hoses

Question 15

What is the fuel quantity for long range tanks?

Answer 15

25 US Gallons each

Question 16

The maximum allowable difference between long range tanks is?

Answer 16

8 US Gallons

Question 17

If there was a break in the fuel indicator line, what does that indicate?

Answer 17

Ungauged fuel in each tank

Question 18

During the first 50 hours of operation of a brand new or overhauled engine, what type of oil should you use?

Answer 18

Mineral oil

Question 19

What is the minimum and maximum oil quantity?

Answer 19

Minimum of 4 quarts, max of 8 quarts

Question 20

What is the maximum oil temperature?

Answer 20

245 degrees

Question 21

Explain the DA40’s propeller

Answer 21

A hydraulically regulated constant speed propeller with a variable pitch blade

Question 22

What does the propeller governor do?

Answer 22

Changes the pitch angle of the propeller using hydraulic pressure from the oil in the engine.

Question 23

If you lost oil pressure in the aircraft, what will happen to the governor?

Answer 23

It will set a high RPM