Fuel

Question 1

What is the indication that the Nitrogen Generator System (NGS) is not operation?

Answer 1

INOPERATIVE (amber) light on NGS panel in R Main Wheel Well

Sec 12.010 p 5

Question 2

What does the LOW (amber) fuel alert indicate?

Answer 2

Respective Main Fuel Tank is less than 2000 lbs for greater than 30 seconds

(Sec 12.010 p 7)

Question 3

When does the CONFIG (amber) alert display?

Answer 3

• Center Tank fuel quantity is greater than 1600 lbs, and
• both CTR FUEL PUMP switches are positioned OFF, and
• either engine is running

Remains illuminated until:

• both engines are shutdown, or
• Center Tank Fuel quantity is less than 800 lbs, or
• one CTR FUEL PUMP switch is positioned to ON

(Sec 12.010 p 8)

Question 4

What does the IMBAL (amber) alert mean?

Answer 4

Main Tank fuel quantities differ by greater than 1000 lbs for greater than 60 seconds

(Sec 12.010 p 8)

Question 5

Why is center tank fuel burned first, even though all fuel pumps are operating?

Answer 5

Center Tank fuel pumps (25-41) have a higher PSI output than Main Tank pumps (12-24)

(Sec 12.010 p 10)

Question 6

Will the LOW PRESSURE light (amber) illuminate if a main tank FUEL PUMP switch is placed to OFF?

Answer 6

Main Tank LOW PRESSURE lights illuminate when fuel pump switches are placed to OFF

(Sec 12.010 p 11)

Question 7

The Center Tank Fuel Pump switches are ON. What does a CTR PUMP LOW PRESSURE light (amber) indicate? Will the pump shut off?

Answer 7

CTR PUMP LOW PRESSURE lights indicate low pressure condition for respective pump. Auto shutoff is only on 7, 7F and 9 aircraft.

(Sec 12.010 p 11)

Question 8

When do the Fuel Annunciator and MASTER CAUTION LIGHTS illuminate for a Center Tank Fuel Pump LOW PRESSURE light?

Answer 8

As long as five minutes of flickering, or approx 10 seconds of continuous LOW PRESSURE with Center Tank Fuel Pump for MASTER CAUTION

(Sec 12.010 p 11)

Question 9

What is the purpose of the Crossfeed valve?

Answer 9

The Crossfeed valve allows either engine to use fuel from any tank

(Sec 12.010 p 13)

Question 10

What does a Crossfeed VALVE OPEN light (bright blue) indicate?

Answer 10

valve is in transit or valve position disagrees with selector position

(Sec 12.010 p 13)

Question 11

What can suction feed from the No. 1 Main Tank? The No. 2 Main Thank?

Answer 11

No 1 – No 1 Eng or APU
No 2 – No 2 Eng

(Sec 12.010 p 12)

Question 12

Where is the Fueling Receptacle?

Answer 12

Right wing, under leading edge, just outboard of No 2 Engine

Sec 12.010 p 15

Question 13

What closes both the Spar Fuel Shutoff Valve and the Engine Fuel Shutoff Valve?

Answer 13

• Fire Switch is pulled, or
• Start Lever is placed to CUTOFF

(Sec 12.010 p 13)

Question 14

What does an ENG VALVE CLOSED (bright blue) light indicate? When would you expect to see it?

Answer 14

Valve is in transit or valve position disagrees with Engine Start Lever or Engine Fire Switch position

During engine start moving the Start Lever to IDLE, during shutdown moving Start Lever to CUTOFF, when Fire Switch is pulled

(Sec 12.010 p 14)