Fuel System Flashcards
What happens when all the fuel in an auxiliary tank is pumped to the main tank and consumed?
AUX pump will automatically turn off and supply CAAS with an advisory for the associated tank
What keeps fuel loss and post-crash fires to a minimum by breaking or shearing at predetermined locations and sealing themselves to retain fuel?
Breakaway self sealing fittings
What is installed in each tank to prevent fuel spillage from the vents should the helicopter roll over following a crash landing?
Roll-over Vent System
How is an Engine Fuel Valve opened or closed electronically?
Fire Pull Handles
If the engines are running, CAAS will activate a FUEL LVL caution at ______pounds in the event the fuel quantity low level warning system has failed (internal fuel tank sensors).
<360 lbs for more than 2 seconds
ENG 1/2 FUEL PRESS LO caution(s) activate when fuel pressure in the respective line is below what?
10 psi +/- 1 psi
The fuel flow display on the fuel page of the MFD will flash when fuel flow is equal to or greater than ___________ pounds.
2,995 lbs
What is the purpose of the jet pump system within each main fuel tank?
How are they activated?
Evacuate fuel from the refuel station manifold
By turning on the main tank(s) boost pumps.
How is the jet pump system activated?
By turning on the respective main tank pumps on the overhead sw panel
What two fuel system related switches are monitored by the Cockpit Voice and Flight Data Recorder (CVFDR) for position?
X-FEED and Main Fuel Pump sw’s
What should be avoided if both boost pumps should fail in either main fuel tank with the XFEED open and a low fuel indication?
Nose low attitude in excess of 5 degrees
What is the max capacity for fuel in the CH47F?
6,887.6 lbs
1028 gallons
