Fuel System

Question 1

What is the total fuel system capacity?

Answer 1

2736.5lbs

Question 2

Usable fuel?

Answer 2

2703.6lbs

Question 3

When do you get Low Fuel CAWS?

Answer 3

20 US GAL / 135lbs per side

Question 4

When do you get Fuel Press CAWS?

Answer 4

At les than 2 PSI

Question 5

When does Automatic Fuel Balancing system kick in?

Answer 5

At more than 2 LCD segments (read out on gauge!) or 5% difference.

Question 6

What’s is the limitation of Automatic Fuel Balancing system?

Answer 6

6 LCD segments

Question 7

When do secondary nozzles kick in?

Answer 7

45% NG

Question 8

Where is the Low Fuel Pressure sensor located in the system?

Answer 8

Downstream of the fuel filter, before air separator.

Question 9

When does the fuel filter bypass open?

Answer 9

At 8 PSI.

Question 10

When should PRIST be used?

Answer 10

Below 0 degrees.

Question 11

How does PRIST work?

Answer 11

Lowers freezing level of water in fuel tank.

Question 12

What are the approved types of jet fuels?

Answer 12

JET A
JET A-1
JET B
JP-4

Question 13

What are the AVGAS fuel limitations for use in PC12?

Answer 13

150hrs.

Question 14

True or False? L or R FUEL P CAWS indicate respective boost pump operation.

Answer 14

False. Indicated respective boost pump relay operation. (they go back and fourth)

Question 15

What is the minimum fuel flow valve preset at and why is it there?

Answer 15

90 PPH, to maintain fuel flow needed for engine start and to respond to rapid deceleration power changes.

Question 16

At what point does the “FUEL PRESS” CAWS illuminate?

Answer 16

When PSI drops below 2. It will extinguish when it recovers to at least 3.48 PSI.