Fuel Flashcards
1
Q
Tanks
A
- 2 Fuel tanks (1 each wing)
- Collector box (inboard section of each wing)
- Collector box keeps fuel pumps submerged
- Vent system ensures pressure between tank and ambient remains within structural limits
2
Q
Fuel Quantity
A
- 20,935 LBS total
3
Q
Low level fuel warning occurs when
A
- Each tank has 660 LBS in each tank
4
Q
Where is fuel temperature taken
A
- Fuel temperature is taken from left wing (min -40 C)
5
Q
Fuel pumps
A
- 2 Engine-driven pumps
- 2 primary pumps (main) ejector pumps
- 6 Scavenger ejetor pumps
- 2 AC electrical pumps
- 1 DC electrical pump
6
Q
Engine-Driven pumps
A
- Primary fuel source to the engine
- Provides motive flow to the primary ejector pump
- Provides the pressure for motive flow to scavenger pumps
7
Q
Ejector pumps
A
- Located in collector tank
- Venturi-type/motive flow
- Maintains head pressure in the fuel line going to the respective engine
8
Q
Scavenge pumps
A
- Maintain adequate fuel level in collector tank
9
Q
AC Fuel pumps
A
- Back-up for the ejector pumps
- Used for engine starts
- Used during cross feed operations
- AC pump 2 provides fuel to APU when engine-driven pump (EDP) 2 is not running
10
Q
DC Fuel pump
A
- Installed only in the right wing
- Provides pressurization fuel for normal APU start when AC power or the AC fuel pump 2 is not available
11
Q
Fuel cross feed
A
- Allows fuel to both engines from one tank
- Used to connect fuel imbalance
- Max fuel imbalance is 800 lbs
12
Q
Fuel Cross feed happens when
A
- 800 lbs imbalance and turns off within 100 lbs
13
Q
What happens when fuel cross feed opens
A
- Low 1 right wing tank electric pump turns ON and x-FEED valve opens
- Low 2 left wing tank electric pump turns ON and x-feed valve opens
14
Q
Engine fuel shutoff valve
A
- Only the respective fire handles in the cockpit will close the respective shutoff valve
15
Q
Refueling and Defueling
A
- Single point or over wing
- Powered by BATT2 or DC Buses
