Fuel System

Question 1

What happens when all the fuel in an auxiliary tank is pumped to the main tank and consumed?

Answer 1

AUX pump will automatically turn off, close a check valve to prevent fuel being pumped back into the aux tank, and supply CAAS with an advisory for the associated tank

-10, pg. 2-43

Question 2

What keeps fuel loss and post-crash fires to a minimum by breaking or shearing at predetermined locations and sealing themselves to retain fuel?

Answer 2

Breakaway self sealing fittings

Question 3

What is installed in each tank to prevent fuel spillage from the vents should the helicopter roll over following a crash landing?

Answer 3

Roll-over Vent System

Question 4

How is an Engine Fuel Valve opened or closed electronically?

Answer 4

Fire Pull Handles

Question 5

ENG 1/2 FUEL PRESS LO caution(s) activate when fuel pressure in the respective line is below what?

Answer 5

10 psi +/- 1 psi

-10, pg. 2-53

Question 6

The fuel flow display on the fuel page of the MFD will flash when fuel flow is equal to or greater than ___________ pounds.

Answer 6

2,995 lbs

-10, pg. 2-52

Question 7

What is the purpose of the jet pump system within each main fuel tank?

How are they activated?

Answer 7

Evacuate fuel from the refuel station manifold

By turning on the main tank(s) boost pumps.

Question 8

How is the jet pump system activated?

Answer 8

By turning on the respective main tank pumps on the overhead sw panel

Question 9

What two fuel system related switches are monitored by the Cockpit Voice and Flight Data Recorder (CVFDR) for position?

Answer 9

X-FEED and Main Fuel Pump sw’s

Question 10

What should be avoided if both boost pumps should fail in either main fuel tank with the XFEED open and a low fuel indication?

Answer 10

Nose low attitude in excess of 5 degrees

Question 11

What is the max capacity for fuel in the CH47F?

Answer 11

6,887.6 lbs

1028 gallons