What provides fuel

to the engines?

Primary ejector pump

What is the back up of a primary ejector pump?

Electrical boost pump

What sends fuel to the

boost pumps and

ejector pumps?

Gravity

3 transfer ejector pump in each wing

What is the total fuel?

1660 gallons

11,223 Lbs

Where are the boost pumps and primary ejector pump located?

Hopper tank

How many drains are there?

3 per wings

How do you fuel

only one wing?

Pull the precheck lever on

the wing not being serviced

How do you defuel

one wing only?

Pull the respective precheck lever

When does the boost

pumps come on?

1) Engine start

2) X-feed

3) Low fuel pressure

When does the right boost pump automatically activates?

During APU operation

with right engine off

 What happens during a low fuel pressure event?

Boost pump comes on,

extinguishes pressure low message,

Fuel boost pump L-R message appears

What type of valve is

the X-feed valve?

Motor valve

Fails in last position

Can you X-feed on emer?

Requires main DC

What type of valves are

the firewall shutoff valves?

Motor valve

Will fail in last position

Motive flow are usually open.

When do they close?

a) Start

b) X-feed

When will you get the

message about low fuel?

540 Lbs

 (+-60)

Explain X-feed

1) X-feed valve opens

2) Supplying boost pump activates

3) Opposite motive flow closes after 3 seconds

What if fuel level is more than 500 lbs, but you still get a low fuel message?

Could indicate blocked flopper valves

What messages come

during X-feed?

a) Fuel X-feed

b) Fuel boost pump L-R

What happens if the motive

flow shuttle valve closes

too soon during X-feed?

1- Low fuel pressure occurs

2- Activates receiving side boost pump

3- Terminating X-feed

 What messages will you get

during X-feeding and

the motive flow valve

closes too soon?

a) Supplying tank Fuel boost pump on L-R

b) Receiving side Fuel boost pump on L-R

Do you need main DC

to supply fuel to the engines?

Not required except for:

a) Start

b) Low fuel pressure

c) X-feed

When are the precheck

levers used?

When checking the wing refuel shutoff valve

When defueling one wing only

What is the NACA scoop

under the wing for?

Fuel vent

Or fuel drain if overflow

Under the wing, what is next

to the NACA scoop

with a filter on it?

Positive/negative pressure valve during fueling/defueling

Also a vent if NACA scoop gets clogged

What powers the fuel

quantity signal conditioner?

Main DC

What powers the low

fuel level float?

Emer bus

What triggers the fuel low annunciator and CAS messages?

Float switch

What technique is used to

preflight the X-feed switch?

Turn it to the left. Won't deploy the masks by accident if grabbing the pass oxy auto knob

How much fuel is

planned for taxi?

175 Lbs

How much fuel is planned

for 45 minutes reserve?

1464 Lbs

What should you set the power

at to preclude power surge

while X-feeding?

Set throttles to CRU or higher

When does the "ON" light

illuminates on the boost

pump switch light?

a) Low fuel pressure

b) Manual activation

What triggers fuel level low L-R

on EICAS?

MAU's

What are you supposed to

turn on when the fuel tanks

are reaching 600 Lbs each?

Fuel pumps

What constitute a good

precheck test?

Totalizer should show 0 to 6 GPM

fuel flow within 30 seconds

Do you know how much

fuel you have in EMER?

Gauges require main DC

Will only know low fuel

with the float switch

What is the purpose of

the precheck system?

To test the automatic high level shutoff

system prior to fueling completion

What is the main source of fuel

to the engine driven pump?

Primary ejector pump

True or false: FUEL FILTER BYPASS

indicates a bypass is occuring

False: message is triggered by

an impending bypass switch