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- the electric pump,
- the filter,
- the filter installed in the tanks,
- the fuel tank selector control,
- the check valve (option).
2. LOCATION (Figures 1 and 1A)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
Electric pump 1 100 121 / 131 28-20-01
Filter 1 100 121 / 131 28-20-02
Tank filter 2 510 / 610 511 / 611 28-20-03
Fuel tank selector control 1 250 211L 28-20-04
Check valve (option) 1 250 211 L 28-20-05
3. DESCRIPTION
A. Electric pump
The electric pump (also known as booster pump or auxiliary pump) supplies the engine pump and provides fuel pressure required for engine start-up.
The electric pump consists of :
- the pump casing, with a pressure relief valve and a by-pass valve,
- the electric motor.
The BUS 2 bar supplies energy to the electric pump.
B. Filter
The filter, located on the firewall on power plant side, has a filtering capacity of 100 microns. It filters the fuel from the tanks before it enters the electric pump. The filter has no check valve.
C. Fuel tank filter The strainer-type tank filter (one per tank) is located on the root pressure bulkhead of each tank.
ADM
Validity : S / N 1 - 730 28-20-00Page 1
(DA) SEP 02
D. Fuel tank selector control
The fuel tank selector enables the pilot to control the three-way cock. The fuel tank selector control is located on the L.H. instrument panel strip. The selector has the following positions : "L TANK", "OFF" and "R TANK".
The three-way cock allows to open and to select the tanks. It is located on the front table under the L.H. instrument panel and is accessible by tilting the table.
E. Check valve (option)
The purpose of the check valve is to prevent electric fuel pump unpriming since the electric fuel pump supply is located above the tapping point on the fuel tanks. The check valve is located between the selector cock and the electric fuel pump.
4. OPERATION
The pilot selects the tank using the selector and the fuel flows to the electric and engine pumps through the tank filter, three-way cock and filter on the firewall.
A - "DUKES" electric pump
B - Filter
C - Tank filter
D - Tank selector controls and cock
E - Check valve (option)
A - "WELDON" electric pump
B - Filter
C - Tank filter
D - Tank selector controls and cock
E - Check valve (option)
O
14282000AAACYZ14101
Fuel supply - Identification and location of components
Figure 'IA
ADAA
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