Fuel System Flashcards Preview

Bell 212 > Fuel System > Flashcards

Flashcards in Fuel System Deck (13):
1

How many fuel cells?

5 - 3 upper, 2 underfloor

+ supplements for either 1 or 2 20/90 aux tanks

2

How many and where is the refueling port(s)?

One, right side

3

Fuel capacity

219.6 gallons = 1493.3 lbs

+ 90 gal aux tank ~ 307 gallons = 2087.6 lbs

4

Fuel burn

~650 lbs/hr

Rough formula: Mast torque x 10

5

Lower Fuel Cell Components

Fuel boost pump
Fuel flow switch
Fuel float switch
Fuel sump drain valve
Interconnecting fitting
Fuel-pressured-powered ejector pump
Two fuel quantity probes

6

What is the purpose of the fuel float switch?

Illuminates FUEL LOW Caution light when below 70 lbs.

Total fuel remaining lasts ~10 mins at MCP.

7

What is the purpose of the lower fuel cell interconnect valves?

Ensures that if a boost pump fails, the fuel remaining is accessible to he other boost pump.

8

How are the interconnect valves actuated?

28 VDC from #2 Essential BUS

INTCON switch on the fuel panel

9

Are the interconnect valves open or closed in NORM?

Closed

10

Reasons to open the interconnect valves

Fuel level is low
Boost pump failure
Engine shut down in flight

11

What powers the fuel valves?

Fuel valve switch
28 VDC from respective Essential BUS

12

When does the FUEL VALVE Caution light illuminate?

Anytime a fuel valve either opens or closes

13

What happens to the fuel as a FIRE PULL handle is pulled?

The necessary fuel valve electronically closes regardless of fuel valve switch position.

FUEL VALVE Caution light illuminates.

Fuel is restricted to the associated engine.