BE30 - Fuel & Fire extinguisher systems

Question 1

Mains qty

each & total

Answer 1

each 1273
tot 2546

Question 2

Aux qty

each & total

Answer 2

each 533
tot 1065

Question 3

Total usable fuel

Answer 3

3611

Question 4

Yellow Arc qty

& associated limit

Answer 4

265
No take-off

Question 5

[L/R FUEL QTY]

Qty (lbs & time)

Answer 5

300 lbs / 45 g
30 min at MCP

Question 6

Max imbalance

Answer 6

300

Includes both fuel & wing lockers load

Question 7

Approved grades

• Regular (3)
• Military (3)

Answer 7

Regular =
- Jet A
- Jet A-1
- Jet B

Military =
- JP4
- JP5
- JP8

Question 8

Commercial Grades -
Limitations (3)

Answer 8

• Max 150hr between engine overhauls
• Both standby pumps must be operative
• Crossfeed must be operative for flights ≥ FL200

Question 9

Fuel freezing point -
JetA / JetA-1

Answer 9

-40°
-50°

Question 10

[FUEL PRESS LO]

• Trigger
• Limit

Answer 10

9-11psi decreasing pressure

• Limited to (10) hours before overhaul /or/ replacement of engine-driven fuel pump

Question 11

CROSSFEED
- When can it be used?

Answer 11

Restricted to single engine ops

Question 12

STANDBY PUMPS
- How many are required for takeoff?

Answer 12

Approved engine fuels = (1)
* But crossfeed capability will not be available on the side of the inop stdby pump

Commercial Grade fuels = (2)
* Crossfeed must be operative for flights > FL200

Question 13

How is fuel moved from the AUX tanks to the Nacelle tank?

Answer 13

Motive Flow Jet pump

Question 14

How is fuel moved from the WING tank to the Nacelle?

Answer 14

Gravity

Question 15

What happens if the High Pressure engine-driven fuel pump fails?

Answer 15

The engine flames-out immediatly

Question 16

[NO FUEL XFR]

• Trigger

Answer 16

Fuel is the AUX tank
&
Fuel pressure < 6 psi at the motive flow valve.

Question 17

During CROSSFEED operation :
- In which position should the Standby Pump switches be?
- Which Standby Pump will be activated?

Answer 17

Both switches should be OFF

The Standby Pump on the FEEDING SIDE will be automatically activated

Question 18

How is fuel moved from the NACELLE tank to the FCU?

Answer 18

Engine-Driven Boost Pump (or STDBY Boost pump, if inop)
&
Engine-Driven High Pressure Pump

Question 19

FUEL NOZZLES =
- How many of them?
- When does the 2nd stage activates?

Answer 19

• 14 nozzles, divided in 2 sets
• N1 > 35%

Question 20

FIRE EXTINGUSHER =
- How many spray tubes in each engine?

Answer 20

8

Question 21

ENGINE FIRE EXTINGUISHERS - Tests purpose :
- DET ?
- EXT ?

Answer 21

DET =
Checks the continuity of the detection loop

EXT =
Checks the continuity of wiring ti the squib and cartridge

Question 22

FIRE EXTINGUISHER - Cartridge =
- Conditions for its discarge to be available?

• Electrical
• Switches circuitry

Answer 22

BAT BUS - NORM

The BAT BUS switch must be set to NORM (not EMER OFF) - In order to power the DUAL-FED Bus.

However, the BATTERY switch itself may be OFF.

Firewwall Valve - PUSHBUTTON

First, the firewall fuel valve push button must be in the closed position to complete the circuit to the fire extinguisher push button.

Then, once the circuit is complete, the fire extinguisher push button, placarded “EXTINGUISHER PUSH”

DUAL-FED (HOT BAT)
- FW Valve PUSHBUTTON
- Engine Fire Extinguisher PUSHBUTTON & SYSTEM

TPL-FED (BAT)
- FW Valve closing SYSTEM
- - - - -
Therefore, the circuitry can be completed - and the cartridge can be discharged - while having solely the BAT BUS EMER switch ON (BAT can be OFF).

However, BAT power is required to actually close the FW Valve and completly cutoff fuel supply to the engine.