Troubleshoot Electronic Engine Fuel Controls

Question 1

What is meant by trimming a turbine engine?

Answer 1

Adjusting the fuel control for the proper specific gravity of the fuel and the proper idle and full throttle RPM

Question 2

What are two types of electronic fuel controls for turbine engines?

Answer 2

Supervisory Electronic Engine Control and FADEC

Question 3

Does a turbine engine controlled by a FADEC require manual trimming?

Answer 3

No, this is done by the FADEC

Question 4

When should a turbine engine be retrimmed?

Answer 4

Any time there is a decrease in engine thrust and after any maintenance that the manufacturer specifies as requiring retrimming

Question 5

Are the instruments installed in an suitable for use when trimming a turbine engine?

Answer 5

No a special analyzer/trimmer such as JetCal should be used

Question 6

What specifications are used to trim a turbine engine?

Answer 6

The data plate specifications for the specific engine. This data was obtained when the engine was calibrated in the manufacturers test cell