FUEL SYSTEM

Question 1

The fuel system is a…

Answer 1

crashworthy
suction-type system
self-sealing tanks
has breakaway valves

Question 2

The prime/boost pumps do what?

Answer 2

primes all fuel lines if prime
is lost
also acts as a boost pump for APU start and operation

Question 3

Fuel is drawn by the ___-___ fuel boost pump and then pumped through the engine ___ ___ to the HMU high-pressure pump

Answer 3

engine-driven
fuel filter

Question 4

Are the fuel filters sensitive to water contamination?

Answer 4

No

Question 5

Tank Fuel Boost Pump location, function, and purpose.

Answer 5

submerged in fuel tank
electrically operated
provides positive fuel supply and secondary means to prime engines

Question 6

How many gallons are the main fuel tanks?

Answer 6

180 gallons each

Question 7

Fuel tanks are ballistic-tolerant; the lower one-third of the tank will seal damage from rounds up to ___ and the upper two-thirds of the tank will seal damage from rounds up to ___

Answer 7

14.2 mm
7.62 mm

Question 8

Are Aux tanks also crashworthy and ballistically tolerant?

Answer 8

Yes

Question 9

Aux tank capacity (and usable)?

Answer 9

200-gallon (194 gallon usable)

Question 10

What do aux tanks use to gauge level?

Answer 10

gauge probe

Question 11

For fuel loads of 2,400 to 3,700 pounds, only the ____
auxiliary tank should be fueled. For fuel loads of more than 3,700 pounds, ___ auxiliary tanks should be fueled

Answer 11

FWD
both

Question 12

Fuel will transfer at a rate of approximately…

Answer 12

350 pounds per minute

Question 13

The fuel quantity indicating system incorporates the following:

Answer 13

fuel signal conditioner
two capacitance-type fuel probes (one in
each main tank)
two low-level fuel thermisters (one on each fuel probe)

Question 14

Individual fuel tank display quantities turn yellow on FDs and MDs when…

Answer 14

tank has 300lbs or less

Question 15

Total fuel quantity display turns yellow when…

Answer 15

total fuel level reaches 600 pounds or less

Question 16

Low-level fuel thermister activates the FUEL LOW caution when…

Answer 16

the fuel level in a main tank reaches 300 ±15 pounds

Question 17

Fuel Low master caution will be displayed when a fuel low condition is detected for a period greater than ___ and will be deactivated when the condition is not detected for a period of ___

Answer 17

5 seconds
20 seconds

Question 18

The minimum dump rate is
approximately:

Answer 18

800 pounds per minute

Question 19

When is fuel dump available?

Answer 19

When helo is weight off wheels

Question 20

Fuel dump will continue until approximately how many pounds left (each tank)?

Answer 20

300lbs per side

Question 21

How can you dump fuel from aux tanks?

Answer 21

must be transferred first

Question 22

Pressure refueling port psi

Answer 22

standard 55psi

Question 23

closed circuit refueling port psi

Answer 23

15 psi (from field refueling stations)