Systems - Fuel

Question 1

General

Answer 1

• Independent Fuel System for Each Engine
• Five Bladder Fuel Cells
• Left Engine – Forward Fuselage and Dorsal Cells
• Right Engine – Center and Aft Fuselage Cells

Question 2

Total Fuel

Answer 2

3906 lbs

Question 3

Left Fuel

Answer 3

1916 lbs

Question 4

Right Fuel

Answer 4

1990 lbs

Question 5

Refueling (2 methods)

Answer 5

• Single Point Refueling – Refuels Both Systems Simultaneously
• Over-the-Top Refueling – Both Systems Separate
  
  • 60lbs Less of Usable Fuel When Refueled
  • Must Fill Left Tank First

Question 6

How are fuel boost pumps powered?

Answer 6

AC Powered, Supplies Fuel Under Low Pressure to the Engine-Driven Fuel Pump

Question 7

Gravity Feed Can Maintain Fuel For MAX Power Up to

Answer 7

25,000 ft

Guaranteed Only to 6,000ft (Flameouts Have Occurred at 7,000ft)

Question 8

Are engine-driven boost pumps necessary for engine operation?

Answer 8

Yes

Question 9

Boost Pump Switches Only Accessible From the ___ (Lights in ___)

Answer 9

FCP, RCP

Question 10

Two Fuel Low Pressure Lights in Both Cockpits

Answer 10

• Crossfeed Off – Indicates Boost Pump Failure
• Crossfeed On – Indicates Possible Fuel Leak
• Blinking is Not an Indication of Boost Pump Failure (Occurs When Using AB)

Question 11

Fuel Pressure Switches

Answer 11

Determine If Engine Driven Boost Pumps are Providing Adequate Pressure

Question 12

Fuel Shutoff Switches

Answer 12

• DC Operated (Left Essential)
• Fuel Shutoff Valves are Normally Operated by the Throttles (Switches Can Be Used)
• Shuts Off Fuel Flow to the Engine in Approximately 1 Second
• Switches Only Used in Emergency, May Damage Engine-Driven Fuel Pumps and Main Fuel Control

Question 13

How is fuel crossfeed powered?

Answer 13

DC

Question 14

Fuel crossfeed corrects imbalances of

Answer 14

200 lbs or more

Question 15

ON position operates

Answer 15

Both Engines From One Fuel System With the Boost Pump Operating

Question 16

With Crossfeed ON Ensure

Answer 16

One Boost Pump is Operational and One is Turned Off (Rapid Fuel Imbalance Otherwise)

Question 17

If Crossfeed Operation is Continued Until the Active System Runs Dry

Answer 17

Dual Engine Flameout Occurs

Question 18

During Crossfeed, If Using a High Power Setting

Answer 18

Low Pressure Light May Illuminate and Engine RPM Fluctuations May Occur Because of Insufficient Fuel Pressure

Question 19

Do Not Crossfeed When

Answer 19

• Boost Pump Failure
• Indicator Malfunction (Fuel Quantity)
• Leak
• Low Altitude (2 Engines)
• Low Fuel (2 Engines)

Question 20

Does fuel flow read for the AB?

Answer 20

No

Question 21

How many probes for fuel quantity?

Answer 21

7 (AC powered)

Question 22

Red Bar if Fuel Drops Below

Answer 22

250 ±25lbs in EITHER System >7.5 Seconds

Question 23

FUEL LOW Light Illuminates When

Answer 23

Red Bar Appears (Not Connected to Fuel System, Only to Gage)

Question 24

If Indicator (AC) is Lost or EED (DC) is Lost

Answer 24

Warning System is Lost

Question 25

Fuel Imbalance Indications

Answer 25

10lb Increments Under the Bar With the Greater Fuel (Maximum of 910lbs) - 0-50lbs – No Display; - 60-200lbs – White Display; - >200lbs – Red Display - Maximum Imbalance Indications 910lbs

Question 26

Fuel Quantity May be Checked with AC Failure b

Answer 26

Engaging Static Inverter

Question 27

Low Fuel Precautions: When Solo, Ensure

Answer 27

Right Does Not Equal Twice the Left System (CG Out of Limits)

Question 28

Low Fuel Precautions: Maintain Positive Pitch

Answer 28

With the Fuel Low Caution Light Illuminated (Precludes Uncovering Boost Pump Inlets and Cavitation)

Question 29

Low Fuel Precautions: Below 650lbs in Either System

Answer 29

Upper Inlet of Boost Pump is Uncovered Causing 40% Reduction in Output

Question 30

Low Fuel Precautions: During Low Fuel States (250 ±25lbs)

Answer 30

Do Not Use Crossfeed With Both Boost Pumps Operating as Dual Engine Flameout May Occur (There is No Cockpit Indication of Boost Pump Failure in this Situation)

Question 31

Low Fuel Precautions: During SE and Low Fuel Operation

Answer 31

Leave Both Boost Pumps and Crossfeed On (Prevents Engine Flameout)

Question 32

Low Fuel Precautions: Avoid MAX Thrust Dives With Less Than

Answer 32

650lbs in Either Fuel Tank

Question 33

Low Fuel Precautions: Fuel Imbalance Must be Maintained Within

Answer 33

200lbs to Ensure CG Remains Within Limits

Question 34

Prevention of Fuel Starvation

Answer 34

Avoid MAX Thrust in 0 or – G Flight Exceeding - 10 Seconds – 10,000ft - 30 Seconds – 30,000ft