Fuel & Warning Systems

Question 0

What is the surge bay used for?

Answer 0

main tank venting and fuel recovery allowing for positive pressure in the fuel tanks

Question 1

Three sections of wet wing fuel tank

Answer 1

Surge bay, main tank, collector bay

Question 2

How is the surge bay vented?

Answer 2

two internal standpipes connected to two NACA vents

Question 3

Total usable fuel

Answer 3

11,724 lbs

Question 4

How does the collector bay gather fuel from the main tank?

Answer 4

four scavenge ejector pumps and flapper valves

Question 5

What provides a constant low pressure/high volume fuel supply to the Fuel Metering Unit (FMU)?

Answer 5

Primary Ejector Pump mounted to the floor of the collector bay

Question 6

How do the scavenge ejector pumps and primary ejector pump receive motive flow fuel?

Answer 6

high pressure/low volume motive flow fuel from the return line of the FMU

Question 7

What serves as a backup source of fuel boost pressure?

Answer 7

two AC powered auxiliary fuel pumps, one mounted on the floor of each collector bay

Question 8

1 or #2 ENG FUEL PRESS caution light

Answer 8

pressure at engine driven pump inlet is low, ejector pump failure or loss of motive flow to the ejector pump

Question 9

1 of #2 FUEL FLT BYPASS caution light

Answer 9

engine fuel line has bypassed the filter

Question 10

1 or #2 TANK FUEL LOW caution light

Answer 10

fuel senses 305 lbs of fuel remaining in collector tank

Question 11

FUELING ON

Answer 11

Refueling/Defueling panel access panel is open and power is applied to the panel

Question 12

How is fuel quantity determined?

Answer 12

a Fuel Quantity Computer uses nine capacitance-type fuel probes in each tank, or magnasticks on the underside of each tank

Question 13

How is the fuel temperature measured?

Answer 13

ambient fuel tank temperature via the left collector bay and shown on the MFD fuel page; engine inlet temperature or left and right engine fuel after it has passed though the Fuel/Oil Heat Exchanger is shown at the bottom of the ED

Question 14

What do Warning Tone Generators do?

Answer 14

the two WTGs compute and provide the warning tones which alert the flight crew to specific events or system failures

Question 15

What will trigger a takeoff warning horn?

Answer 15

elevator trim out of takeoff range
parking brake set to PARK
condition levers not at max
flaps extended more than 20 degrees or less than 3.6 degrees
inboard or outboard spoilers are exended

Question 16

Usable fuel per tank

Answer 16

5,862 lbs