DOC AIRBUS | AMM A320FFUEL RECOVERY SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The fuel recovery system is intended to collect and contain the unburned fuel within the nozzle lines following engine shutdown. This prevents spilling of the unburned fuel from the engine. At shutdown, the flow divider valve connects all the nozzle lines to the recovery drain line and the remaining fuel is driven to the fuel recovery tank. During starting, this fuel volume is recovered by the fuel return pump and re-injected to the Integrated Fuel Pump and Control (IFPC) boost pump.
** ON A/C NOT FOR ALL The fuel recovery system is intended to collect and contain the unburned fuel within the nozzle lines following engine shutdown. This prevents spilling of the unburned fuel from the engine. At shutdown, the flow divider valve connects all the nozzle lines to the recovery drain line and the remaining fuel is driven to the fuel recovery tank. During starting, this fuel volume is recovered by the fuel return pump and re-injected to the Integrated Fuel Pump and Control (IFPC) boost pump.
2. Component Location
** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 4052EM | PUMP-FUEL RETURN | 400 | 73-11-42 | ||
3. Component Description
A. Fuel Return Pump
The Fuel return Pump consists of a machined housing with two fittings.
The Fuel Return Pump is mounted on the Fuel Manifold.
The pump is a line replaceable unit.
The Fuel return Pump consists of a machined housing with two fittings.
The Fuel Return Pump is mounted on the Fuel Manifold.
The pump is a line replaceable unit.
B. Fuel Recovery Tank
The fuel recovery tank is located under the fuel/oil heat exchanger bypass valve at the 5 o'clock position. The tank is sized to hold enough fuel for a single engine shutdown. An inlet float valve closes the inlet when the tank has reached its capacity. At the outlet of the tank there is a spring loaded one-way check valve installed in the outlet port (spring loaded closed) and an outlet float valve that covers the check valve. The two valves work together to drain fuel from the tank. The tank is a Line Replaceable Unit (LRU).
The fuel recovery tank is located under the fuel/oil heat exchanger bypass valve at the 5 o'clock position. The tank is sized to hold enough fuel for a single engine shutdown. An inlet float valve closes the inlet when the tank has reached its capacity. At the outlet of the tank there is a spring loaded one-way check valve installed in the outlet port (spring loaded closed) and an outlet float valve that covers the check valve. The two valves work together to drain fuel from the tank. The tank is a Line Replaceable Unit (LRU).
4. System Description
The Fuel return Pump draws the fuel from the Fuel Recovery Tank back to the IFPC Boost Pump at engine start-up. The Boost Pump directs pressurized fuel to the Fuel Return Pump during engine operation. The pressurized fuel flows through the Fuel Return Pump creating the motive flow (Venturi effect) to draw the fuel from the Fuel Recovery Tank. The combined fuel is returned to the inlet of the Boost Pump.
The Fuel Return Tank collects the fuel from the primary and secondary fuel lines that have drained from the flow divider valve after engine shutdown. Combustor pressure and gravity provide the motive force to push the fuel from the primary and secondary fuel lines into the Tank.
The Fuel return Pump draws the fuel from the Fuel Recovery Tank back to the IFPC Boost Pump at engine start-up. The Boost Pump directs pressurized fuel to the Fuel Return Pump during engine operation. The pressurized fuel flows through the Fuel Return Pump creating the motive flow (Venturi effect) to draw the fuel from the Fuel Recovery Tank. The combined fuel is returned to the inlet of the Boost Pump.
The Fuel Return Tank collects the fuel from the primary and secondary fuel lines that have drained from the flow divider valve after engine shutdown. Combustor pressure and gravity provide the motive force to push the fuel from the primary and secondary fuel lines into the Tank.