# Aircraft Fuel System Events<no value>
The event IDs listed here are all related to the fuel systems of an aircraft.


### Cross Feed

{{< table-wrapper "colclass-3=font-size:0.75rem" "200px" "200px" "150px" "" >}}

| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="CROSS_FEED_OPEN" />}}`CROSS_FEED_OPEN` | `KEY_CROSS_FEED_OPEN` | N/A | Opens cross feed valve (when used in conjunction with "isolate" tank) |
| {{< anchor id="CROSS_FEED_TOGGLE" />}}`CROSS_FEED_TOGGLE` | `KEY_CROSS_FEED_TOGGLE` | N/A | Toggles crossfeed valve (when used in conjunction with "isolate" tank) |
| {{< anchor id="CROSS_FEED_OFF" />}}`CROSS_FEED_OFF` | `KEY_CROSS_FEED_OFF` | N/A | Closes crossfeed valve (when used in conjunction with "isolate" tank) |
| {{< anchor id="CROSS_FEED_LEFT_TO_RIGHT" />}}`CROSS_FEED_LEFT_TO_RIGHT` | `KEY_CROSS_FEED_LEFT_TO_RIGHT` | N/A | Sets the fuel crossfeed to be from left to right. |
| {{< anchor id="CROSS_FEED_RIGHT_TO_LEFT" />}}`CROSS_FEED_RIGHT_TO_LEFT` | `KEY_CROSS_FEED_RIGHT_TO_LEFT` | N/A | Sets the fuel crossfeed to be from right to left. |

{{< /table-wrapper >}}


### Fuel Selector

{{< table-wrapper "colclass-3=font-size:0.75rem" "200px" "200px" "150px" "" >}}

| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="FUEL_SELECTOR_ALL" />}}`FUEL_SELECTOR_ALL` | `KEY_FUEL_SELECTOR_ALL` | N/A | Turn fuel selector 1 to the ALL position. |
| {{< anchor id="FUEL_SELECTOR_CENTER" />}}`FUEL_SELECTOR_CENTER` | `KEY_FUEL_SELECTOR_CENTER` | N/A | Turns selector 1 to CENTER position. |
| {{< anchor id="FUEL_SELECTOR_LEFT" />}}`FUEL_SELECTOR_LEFT` | `KEY_FUEL_SELECTOR_LEFT` | N/A | Turns selector 1 to LEFT position (fuel will be retrieved from Left Tip then Left Aux then Left Main). |
| {{< anchor id="FUEL_SELECTOR_LEFT_AUX" />}}`FUEL_SELECTOR_LEFT_AUX` | `KEY_FUEL_SELECTOR_LEFT_AUX` | N/A | Turns selector 1 to LEFT AUX position. |
| {{< anchor id="FUEL_SELECTOR_LEFT_MAIN" />}}`FUEL_SELECTOR_LEFT_MAIN` | `KEY_FUEL_SELECTOR_LEFT_MAIN` | N/A | Sets the fuel selector for engine 1 to the left Main tank. |
| {{< anchor id="FUEL_SELECTOR_OFF" />}}`FUEL_SELECTOR_OFF` | `KEY_FUEL_SELECTOR_OFF` | N/A | Turn fuel selector 1 to the OFF position. |
| {{< anchor id="FUEL_SELECTOR_RIGHT" />}}`FUEL_SELECTOR_RIGHT` | `KEY_FUEL_SELECTOR_RIGHT` | N/A | Turns selector 1 to RIGHT position (fuel will be retrieved from Right Tip then Right Aux then Right Main). |
| {{< anchor id="FUEL_SELECTOR_RIGHT_AUX" />}}`FUEL_SELECTOR_RIGHT_AUX` | `KEY_FUEL_SELECTOR_RIGHT_AUX` | N/A | Turns selector 1 to RIGHT AUX position. |
| {{< anchor id="FUEL_SELECTOR_RIGHT_MAIN" />}}`FUEL_SELECTOR_RIGHT_MAIN` | `KEY_FUEL_SELECTOR_RIGHT_MAIN` | N/A | Sets the fuel selector for engine 1 to the right Main tank. |
| {{< anchor id="FUEL_SELECTOR_SET" />}}`FUEL_SELECTOR_SET` | `KEY_FUEL_SELECTOR_SET` | [0]: Number | Sets selector 1 position (see the [Fuel Selector Codes](#fuel-selector-codes) list for the correct code to use). |
| {{< anchor id="FUEL_SELECTOR_1_ISOLATE" />}}`FUEL_SELECTOR_1_ISOLATE` | `KEY_FUEL_SELECTOR_1_ISOLATE` | N/A | Sets fuel selector 1 to "Isolate". |
| {{< anchor id="FUEL_SELECTOR_1_CROSSFEED" />}}`FUEL_SELECTOR_1_CROSSFEED` | `KEY_FUEL_SELECTOR_1_CROSSFEED` | N/A | Sets fuel selector 1 to "Crossfeed". |
| {{< anchor id="FUEL_SELECTOR_2_ALL" />}}`FUEL_SELECTOR_2_ALL` | `KEY_FUEL_SELECTOR_2_ALL` | N/A | Turns selector 2 to ALL position. |
| {{< anchor id="FUEL_SELECTOR_2_CENTER" />}}`FUEL_SELECTOR_2_CENTER` | `KEY_FUEL_SELECTOR_2_CENTER` | N/A | Turns selector 2 to CENTER position. |
| {{< anchor id="FUEL_SELECTOR_2_CROSSFEED" />}}`FUEL_SELECTOR_2_CROSSFEED` | `KEY_FUEL_SELECTOR_2_CROSSFEED` | N/A | Sets fuel selector 2 to "Crossfeed". |
| {{< anchor id="FUEL_SELECTOR_2_ISOLATE" />}}`FUEL_SELECTOR_2_ISOLATE` | `KEY_FUEL_SELECTOR_2_ISOLATE` | N/A | Sets fuel selector 2 to "Isolate". |
| {{< anchor id="FUEL_SELECTOR_2_LEFT" />}}`FUEL_SELECTOR_2_LEFT` | `KEY_FUEL_SELECTOR_2_LEFT` | N/A | Turns selector 2 to LEFT position (fuel will be retrieved from Left Tip then Left Aux then Left Main). |
| {{< anchor id="FUEL_SELECTOR_2_LEFT_AUX" />}}`FUEL_SELECTOR_2_LEFT_AUX` | `KEY_FUEL_SELECTOR_2_LEFT_AUX` | N/A | Turns selector 2 to LEFT AUX position. |
| {{< anchor id="FUEL_SELECTOR_2_LEFT_MAIN" />}}`FUEL_SELECTOR_2_LEFT_MAIN` | `KEY_FUEL_SELECTOR_2_LEFT_MAIN` | N/A | Sets the fuel selector for engine 2 to the left Main tank. |
| {{< anchor id="FUEL_SELECTOR_2_OFF" />}}`FUEL_SELECTOR_2_OFF` | `KEY_FUEL_SELECTOR_2_OFF` | N/A | Turns selector 2 to OFF position. |
| {{< anchor id="FUEL_SELECTOR_2_RIGHT" />}}`FUEL_SELECTOR_2_RIGHT` | `KEY_FUEL_SELECTOR_2_RIGHT` | N/A | Turns selector 2 to RIGHT position (fuel will be retrieved from Right Tip then Right Aux then Right Main) |
| {{< anchor id="FUEL_SELECTOR_2_RIGHT_AUX" />}}`FUEL_SELECTOR_2_RIGHT_AUX` | `KEY_FUEL_SELECTOR_2_RIGHT_AUX` | N/A | Turns selector 2 to RIGHT AUX position. |
| {{< anchor id="FUEL_SELECTOR_2_RIGHT_MAIN" />}}`FUEL_SELECTOR_2_RIGHT_MAIN` | `KEY_FUEL_SELECTOR_2_RIGHT_MAIN` | N/A | Sets the fuel selector for engine 2 to the right Main tank. |
| {{< anchor id="FUEL_SELECTOR_2_SET" />}}`FUEL_SELECTOR_2_SET` | `KEY_FUEL_SELECTOR_2_SET` | [0]: Number | Sets selector 2 position (see the [Fuel Selector Codes](#fuel-selector-codes) list for the correct code to use). |
| {{< anchor id="FUEL_SELECTOR_3_ALL" />}}`FUEL_SELECTOR_3_ALL` | `KEY_FUEL_SELECTOR_3_ALL` | N/A | Turns selector 3 to ALL position. |
| {{< anchor id="FUEL_SELECTOR_3_CENTER" />}}`FUEL_SELECTOR_3_CENTER` | `KEY_FUEL_SELECTOR_3_CENTER` | N/A | Turns selector 3 to CENTER position. |
| {{< anchor id="FUEL_SELECTOR_3_CROSSFEED" />}}`FUEL_SELECTOR_3_CROSSFEED` | `KEY_FUEL_SELECTOR_3_CROSSFEED` | N/A | Sets fuel selector 3 to "Crossfeed". |
| {{< anchor id="FUEL_SELECTOR_3_ISOLATE" />}}`FUEL_SELECTOR_3_ISOLATE` | `KEY_FUEL_SELECTOR_3_ISOLATE` | N/A | Sets fuel selector 3 to "Isolate". |
| {{< anchor id="FUEL_SELECTOR_3_LEFT" />}}`FUEL_SELECTOR_3_LEFT` | `KEY_FUEL_SELECTOR_3_LEFT` | N/A | Turns selector 3 to LEFT position (fuel will be retrieved from Left Tip then Left Aux then Left Main). |
| {{< anchor id="FUEL_SELECTOR_3_LEFT_AUX" />}}`FUEL_SELECTOR_3_LEFT_AUX` | `KEY_FUEL_SELECTOR_3_LEFT_AUX` | N/A | Turns selector 3 to LEFT AUX position. |
| {{< anchor id="FUEL_SELECTOR_3_LEFT_MAIN" />}}`FUEL_SELECTOR_3_LEFT_MAIN` | `KEY_FUEL_SELECTOR_3_LEFT_MAIN` | N/A | Sets the fuel selector for engine 3 to the left Main tank. |
| {{< anchor id="FUEL_SELECTOR_3_OFF" />}}`FUEL_SELECTOR_3_OFF` | `KEY_FUEL_SELECTOR_3_OFF` | N/A | Turns selector 3 to OFF position. |
| {{< anchor id="FUEL_SELECTOR_3_RIGHT" />}}`FUEL_SELECTOR_3_RIGHT` | `KEY_FUEL_SELECTOR_3_RIGHT` | N/A | Turns selector 3 to RIGHT position (fuel will be retrieved from Right Tip then Right Aux then Right Main). |
| {{< anchor id="FUEL_SELECTOR_3_RIGHT_AUX" />}}`FUEL_SELECTOR_3_RIGHT_AUX` | `KEY_FUEL_SELECTOR_3_RIGHT_AUX` | N/A | Turns selector 3 to RIGHT AUX position. |
| {{< anchor id="FUEL_SELECTOR_3_RIGHT_MAIN" />}}`FUEL_SELECTOR_3_RIGHT_MAIN` | `KEY_FUEL_SELECTOR_3_RIGHT_MAIN` | N/A | Sets the fuel selector for engine 3 to the right Main tank. |
| {{< anchor id="FUEL_SELECTOR_3_SET" />}}`FUEL_SELECTOR_3_SET` | `KEY_FUEL_SELECTOR_3_SET` | [0]: Number | Sets selector 3 position (see the [Fuel Selector Codes](#fuel-selector-codes) list for the correct code to use). |
| {{< anchor id="FUEL_SELECTOR_4_ALL" />}}`FUEL_SELECTOR_4_ALL` | `KEY_FUEL_SELECTOR_4_ALL` | N/A | Turns selector 4 to ALL position. |
| {{< anchor id="FUEL_SELECTOR_4_CENTER" />}}`FUEL_SELECTOR_4_CENTER` | `KEY_FUEL_SELECTOR_4_CENTER` | N/A | Turns selector 4 to CENTER position. |
| {{< anchor id="FUEL_SELECTOR_4_CROSSFEED" />}}`FUEL_SELECTOR_4_CROSSFEED` | `KEY_FUEL_SELECTOR_4_CROSSFEED` | N/A | Sets fuel selector 4 to "Crossfeed". |
| {{< anchor id="FUEL_SELECTOR_4_ISOLATE" />}}`FUEL_SELECTOR_4_ISOLATE` | `KEY_FUEL_SELECTOR_4_ISOLATE` | N/A | Sets fuel selector 4 to "Isolate". |
| {{< anchor id="FUEL_SELECTOR_4_OFF" />}}`FUEL_SELECTOR_4_OFF` | `KEY_FUEL_SELECTOR_4_OFF` | N/A | Turns selector 4 to OFF position. |
| {{< anchor id="FUEL_SELECTOR_4_LEFT" />}}`FUEL_SELECTOR_4_LEFT` | `KEY_FUEL_SELECTOR_4_LEFT` | N/A | Turns selector 4 to LEFT position (fuel will be retrieved from Left Tip then Left Aux then Left Main). |
| {{< anchor id="FUEL_SELECTOR_4_LEFT_AUX" />}}`FUEL_SELECTOR_4_LEFT_AUX` | `KEY_FUEL_SELECTOR_4_LEFT_AUX` | N/A | Turns selector 4 to LEFT AUX position. |
| {{< anchor id="FUEL_SELECTOR_4_LEFT_MAIN" />}}`FUEL_SELECTOR_4_LEFT_MAIN` | `KEY_FUEL_SELECTOR_4_LEFT_MAIN` | N/A | Sets the fuel selector for engine 4 to the left Main tank. |
| {{< anchor id="FUEL_SELECTOR_4_RIGHT" />}}`FUEL_SELECTOR_4_RIGHT` | `KEY_FUEL_SELECTOR_4_RIGHT` | N/A | Turns selector 4 to RIGHT position (fuel will be retrieved from Right Tip then Right Aux then Right Main). |
| {{< anchor id="FUEL_SELECTOR_4_RIGHT_AUX" />}}`FUEL_SELECTOR_4_RIGHT_AUX` | `KEY_FUEL_SELECTOR_4_RIGHT_AUX` | N/A | Turns selector 4 to RIGHT AUX position. |
| {{< anchor id="FUEL_SELECTOR_4_RIGHT_MAIN" />}}`FUEL_SELECTOR_4_RIGHT_MAIN` | `KEY_FUEL_SELECTOR_4_RIGHT_MAIN` | N/A | Sets the fuel selector for engine 4 to the right Main tank. |
| {{< anchor id="FUEL_SELECTOR_4_SET" />}}`FUEL_SELECTOR_4_SET` | `KEY_FUEL_SELECTOR_4_SET` | [0]: Number | Sets selector 4 position (see the [Fuel Selector Codes](#fuel-selector-codes) list for the correct code to use). |

{{< /table-wrapper >}}


### Fuel System

These key event IDs are used to control the modern Microsoft Flight Simulator 2024 [`[FUEL_SYSTEM]`](../../../content-configuration/cfg-files/Flight_Model/fuel_system.htm).

{{< table-wrapper "colclass-3=font-size:0.75rem" "200px" "200px" "150px" "" >}}

| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="FUELSYSTEM_JUNCTION_SET" />}}`FUELSYSTEM_JUNCTION_SET` | `KEY_FUELSYSTEM_JUNCTION_SET` | [0]: Junction Index<span></span>[1]: Option index | Set the current junction options for which lines are open or closed at any given time. This event requires two parameters: the first is the index of the junction (as defined by the *N* index of the [Junction.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#junctionn) parameter), and the second is the *Option* index, which is what sets the lines to open/close. |
| {{< anchor id="FUELSYSTEM_PUMP_OFF" />}}`FUELSYSTEM_PUMP_OFF` | `KEY_FUELSYSTEM_PUMP_OFF` | [0]: Pump Index | Turn a fuel pump off. The event requires the *N* index of the [Pump.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#pumpn) parameter to define the pump to use. |
| {{< anchor id="FUELSYSTEM_PUMP_ON" />}}`FUELSYSTEM_PUMP_ON` | `KEY_FUELSYSTEM_PUMP_ON` | [0]: Pump Index | Turn a fuel pump on. The event requires the *N* index of the [Pump.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#pumpn) parameter to define the pump to use. |
| {{< anchor id="FUELSYSTEM_PUMP_SET" />}}`FUELSYSTEM_PUMP_SET` | `KEY_FUELSYSTEM_PUMP_SET` | [0]: Pump Index<span></span>[1]: Status 0 = Off 1 = On 2 = Auto | Set a fuel pump to be either on or off or auto. The event requires the *N* index of the [Pump.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#pumpn) parameter to define the pump to use. |
| {{< anchor id="FUELSYSTEM_PUMP_TOGGLE" />}}`FUELSYSTEM_PUMP_TOGGLE` | `KEY_FUELSYSTEM_PUMP_TOGGLE` | [0]: Pump Index | Toggle a fuel pump on/off. The event requires the *N* index of the [Pump.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#pumpn) parameter to define the pump to use. |
| {{< anchor id="FUELSYSTEM_TRIGGER_OFF" />}}`FUELSYSTEM_TRIGGER_OFF` | `KEY_FUELSYSTEM_TRIGGER_OFF` | [0]: Trigger Index | Turn a trigger event off. The event requires the *N* index of the [Trigger.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#triggern) parameter to define the trigger to switch off. |
| {{< anchor id="FUELSYSTEM_TRIGGER_ON" />}}`FUELSYSTEM_TRIGGER_ON` | `KEY_FUELSYSTEM_TRIGGER_ON` | [0]: Trigger Index | Turn a trigger event on. The event requires the *N* index of the [Trigger.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#triggern) parameter to define the trigger to switch off. |
| {{< anchor id="FUELSYSTEM_TRIGGER_SET" />}}`FUELSYSTEM_TRIGGER_SET` | `KEY_FUELSYSTEM_TRIGGER_SET` | [0]: Trigger Index<span></span>[1]: Status, either on (1) or off (0) | Set a trigger event to be either on or off. The event requires the *N* index of the [Trigger.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#triggern) parameter to define the trigger to switch off. |
| {{< anchor id="FUELSYSTEM_TRIGGER_TOGGLE" />}}`FUELSYSTEM_TRIGGER_TOGGLE` | `KEY_FUELSYSTEM_TRIGGER_TOGGLE` | [0]: Trigger Index | Toggle a trigger event on/off. The event requires the *N* index of the [Trigger.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#triggern) parameter to define the trigger to switch off. |
| {{< anchor id="FUELSYSTEM_VALVE_CLOSE" />}}`FUELSYSTEM_VALVE_CLOSE` | `KEY_FUELSYSTEM_VALVE_CLOSE` | [0]: Valve Index | Close a specific valve in the fuel system. The event requires the *N* index of the [Valve.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#valven) parameter to define the valve to target. |
| {{< anchor id="FUELSYSTEM_VALVE_OPEN" />}}`FUELSYSTEM_VALVE_OPEN` | `KEY_FUELSYSTEM_VALVE_OPEN` | [0]: Valve Index | Open a specific valve in the fuel system. The event requires the *N* index of the [Valve.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#valven) parameter to define the valve to target. |
| {{< anchor id="FUELSYSTEM_VALVE_SET" />}}`FUELSYSTEM_VALVE_SET` | `KEY_FUELSYSTEM_VALVE_SET` | [0]: Valve Index<span></span>[1]: Status, either open (1) or closed (0) | Set a valve to be either open or closed. The event requires the *N* index of the [Valve.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#valven) parameter to define the valve to target. |
| {{< anchor id="FUELSYSTEM_VALVE_TOGGLE" />}}`FUELSYSTEM_VALVE_TOGGLE` | `KEY_FUELSYSTEM_VALVE_TOGGLE` | [0]: Valve Index | Toggle a valve open/closed. The event requires the *N* index of the [Valve.N](../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/#valven) parameter to define the valve to target. |

{{< /table-wrapper >}}


### Fuel Transfer Keys

The following keys are only required when using the **legacy** `[FUEL]` system.

{{< table-wrapper "colclass-3=font-size:0.75rem" "200px" "200px" "150px" "" >}}

| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
|---|---|---|---|
| {{< anchor id="SET_FUEL_TRANSFER_CUSTOM" />}}`SET_FUEL_TRANSFER_CUSTOM` | `KEY_SET_FUEL_TRANSFER_CUSTOM` | N/A | Set the fuel transfer mode to the "custom" setting. Requires that at least 1 transfer pump has been defined in the [flight\_model.cfg](../../../content-configuration/cfg-files/flight_model.cfg/) file using the [`fuel_transfer_pump.N`](../../../content-configuration/cfg-files/flight_model.cfg/#fuel_transfer_pump.N`) parameter. |
| {{< anchor id="FUEL_TRANSFER_CUSTOM_INDEX_TOGGLE" />}}`FUEL_TRANSFER_CUSTOM_INDEX_TOGGLE` | `KEY_FUEL_TRANSFER_CUSTOM_INDEX_TOGGLE` | [0]: pump Index | Toggle a custom fuel transfer pump on/off. The index is the Pump ID value supplied as part of the fuel pump definition for the [`fuel_transfer_pump.N`](../../../content-configuration/cfg-files/flight_model.cfg/)#fuel_transfer_pump.N` parameter in the [flight\_model.cfg](../../../content-configuration/cfg-files/flight_model.cfg/) file. |
| {{< anchor id="SET_FUEL_TRANSFER_FORWARD" />}}`SET_FUEL_TRANSFER_FORWARD` | `KEY_SET_FUEL_TRANSFER_FORWARD` | N/A | Set the fuel transfer system to use the "forward" setting, which pumps from tank 1 to tank 2. |
| {{< anchor id="SET_FUEL_TRANSFER_AFT" />}}`SET_FUEL_TRANSFER_AFT` | `KEY_SET_FUEL_TRANSFER_AFT` | N/A | Set the fuel transfer system to use the "aft" setting, which pumps from tank 2 to tank 1. |
| {{< anchor id="SET_FUEL_TRANSFER_AUTO" />}}`SET_FUEL_TRANSFER_AUTO` | `KEY_SET_FUEL_TRANSFER_AUTO` | N/A | Set the fuel transfer pump to automatically balance the fuel in tanks 1 and 2 to maintain the {{< glossterm >}}cg{{< /glossterm >}}. |
| {{< anchor id="SET_FUEL_TRANSFER_OFF" />}}`SET_FUEL_TRANSFER_OFF` | `KEY_SET_FUEL_TRANSFER_OFF` | N/A | Set the fuel transfer pump to off. |

{{< /table-wrapper >}}


### Miscellaneous

{{< table-wrapper "colclass-3=font-size:0.75rem" "200px" "200px" "150px" "" >}}

| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="ADD_FUEL_QUANTITY" />}}`ADD_FUEL_QUANTITY` | `KEY_ADD_FUEL_QUANTITY` | [0]: The fuel quantity | Adds fuel to the aircraft, 25% of capacity by default. 0 to 65535 (max fuel) can be passed. |
| {{< anchor id="ELECT_FUEL_PUMP_SET" />}}`ELECT_FUEL_PUMP_SET` | `KEY_ELECT_FUEL_PUMP_SET` | [0]: Value | Set the electrical pump status for all engines. Values are as follows:<span></span>0 = Off<span></span>1 = On<span></span>2 = Auto<span></span>These keys are only useful when using the legacy `[FUEL]` system. |
| {{< anchor id="ELECT_FUEL_PUMP1_SET" />}}`ELECT_FUEL_PUMP1_SET`<span></span>{{< anchor id="ELECT_FUEL_PUMP2_SET" />}}`ELECT_FUEL_PUMP2_SET`<span></span>{{< anchor id="ELECT_FUEL_PUMP3_SET" />}}`ELECT_FUEL_PUMP3_SET`<span></span>{{< anchor id="ELECT_FUEL_PUMP4_SET" />}}`ELECT_FUEL_PUMP4_SET` | `KEY_ELECT_FUEL_PUMP1_SET`<span></span>`KEY_ELECT_FUEL_PUMP2_SET`<span></span>`KEY_ELECT_FUEL_PUMP3_SET`<span></span>`KEY_ELECT_FUEL_PUMP4_SET` | [0]: Value | Set the electrical pump status for engines 1-4. Values are as follows:<span></span>0 = Off<span></span>1 = On<span></span>2 = Auto<span></span>These keys are only useful when using the legacy `[FUEL]` system. |
| {{< anchor id="ENGINE_FUELFLOW_BUG_POSITION1" />}}<span class="legacy">`ENGINE_FUELFLOW_BUG_POSITION1`</span><span></span>{{< anchor id="ENGINE_FUELFLOW_BUG_POSITION2" />}}<span class="legacy">`ENGINE_FUELFLOW_BUG_POSITION2`</span><span></span>{{< anchor id="ENGINE_FUELFLOW_BUG_POSITION3" />}}<span class="legacy">`ENGINE_FUELFLOW_BUG_POSITION3`</span><span></span>{{< anchor id="ENGINE_FUELFLOW_BUG_POSITION4" />}}<span class="legacy">`ENGINE_FUELFLOW_BUG_POSITION4`</span> |  | N/A | *Not currently used in the simulation.* |
| {{< anchor id="FUEL_DUMP_SWITCH_SET" />}}`FUEL_DUMP_SWITCH_SET` | `KEY_FUEL_DUMP_SWITCH_SET` | [0]: Bool | Set to 1 (TRUE) or 0 (FALSE). The switch can only be set to TRUE if [`fuel_dump_rate`](../../../content-configuration/cfg-files/flight_model.cfg/#fuel_dump_rate) is specified in the [flight_model.cfg](../../../content-configuration/cfg-files/flight_model.cfg/), indicating that a fuel dump system exists.<span></span>This key is only useful when using the legacy [`[FUEL]`](../../../content-configuration/cfg-files/flight_model.cfg/#fuel) system. |
| {{< anchor id="FUEL_DUMP_TOGGLE" />}}`FUEL_DUMP_TOGGLE` | `KEY_FUEL_DUMP_TOGGLE` | N/A | Used to turn on (1, TRUE) or off (0, FALSE) the fuel dump switch.<span></span>This key is only useful when using the legacy [`[FUEL]`](../../../content-configuration/cfg-files/flight_model.cfg/#fuel) system. |
| {{< anchor id="MANUAL_FUEL_PRESSURE_PUMP" />}}`MANUAL_FUEL_PRESSURE_PUMP` | `KEY_MANUAL_FUEL_PRESSURE_PUMP` | N/A | Activate the manual fuel pressure pump. Used for both modern [`[FUEL_SYSTEM]`](../../../content-configuration/cfg-files/flight_model.cfg/fuel_system) and legacy [`[FUEL]`](../../../content-configuration/cfg-files/flight_model.cfg/#fuel) systems. |
| {{< anchor id="MANUAL_FUEL_PRESSURE_PUMP_SET" />}}`MANUAL_FUEL_PRESSURE_PUMP_SET` | `KEY_MANUAL_FUEL_PRESSURE_PUMP_SET` | [0]: The pump index<span></span>[1]: A value between 0 and 16384 | Set the position of the fuel manual pump handle, as a percentage. This key is only useful when using the modern [`[FUEL_SYSTEM]`](../../../content-configuration/cfg-files/flight_model.cfg/fuel_system). |
| {{< anchor id="MANUAL_FUEL_TRANSFER" />}}`MANUAL_FUEL_TRANSFER` | `KEY_MANUAL_FUEL_TRANSFER` | [0]: Bool | When set to 1 (TRUE) it sets the fuel transfer mode to manual. |
| {{< anchor id="RELEASE_DROP_TANK_ALL" />}}`RELEASE_DROP_TANK_ALL` | `KEY_RELEASE_DROP_TANK_ALL` | N/A | Release all external tanks that can be jettisoned. |
| {{< anchor id="RELEASE_DROP_TANK_1" />}}`RELEASE_DROP_TANK_1` | `KEY_RELEASE_DROP_TANK_1` | N/A | Release the first external tank that can be jettisoned. |
| {{< anchor id="RELEASE_DROP_TANK_2" />}}`RELEASE_DROP_TANK_2` | `KEY_RELEASE_DROP_TANK_2` | N/A | Release the second external tank that can be jettisoned. |
| {{< anchor id="REPAIR_AND_REFUEL" />}}`REPAIR_AND_REFUEL` | `KEY_REPAIR_AND_REFUEL` | N/A | Fully repair and refuel the user aircraft. Ignored if flight realism is enforced. |
| {{< anchor id="REQUEST_FUEL_KEY" />}}`REQUEST_FUEL_KEY` | `KEY_REQUEST_FUEL` | N/A | Request a fuel truck. The aircraft must be in a parking spot for this to be successful. |
| {{< anchor id="ANTIDETONATION_TANK_VALVE_TOGGLE" />}}`ANTIDETONATION_TANK_VALVE_TOGGLE` | `KEY_TOGGLE_ANTIDETONATION_TANK_VALVE` | [0]: Tank index (optional) | Toggle the anti-detonation valve. Pass a value to determine which tank to use if there are multiple tanks. See the [Fuel Selector Codes](#fuel-selector-codes) list for the correct tank code to use. Note that this key requires the [`[ANTIDETONATION SYSTEM.N]`](../../../content-configuration/cfg-files/engines.cfg/#antidetonation_systemn) system to have been set up in the [engine configuration file](../../../content-configuration/cfg-files/engines.cfg/). |
| {{< anchor id="NITROUS_TANK_VALVE_TOGGLE" />}}`NITROUS_TANK_VALVE_TOGGLE` | `KEY_TOGGLE_NITROUS_TANK_VALVE` | [0]: Tank index (optional) | Toggle the nitrous valve. Pass a value to determine which tank to use if there are multiple tanks. See the [Fuel Selector Codes](#fuel-selector-codes) list for the correct tank code to use. Note that this key requires the [`[NITROUS SYSTEM.N]`](../../../content-configuration/cfg-files/engines.cfg/#nitrous-systemn) system to have been set up in the [engine configuration file](../../../content-configuration/cfg-files/engines.cfg/). |

{{< /table-wrapper >}}


### Fuel Selector Codes

<div style="max-width:50%;margin-left:auto;margin-right:auto;">

{{< table-wrapper "" "100px" >}}

| FuelSelector                       | Code |
|------------------------------------|:----:|
| `FUEL_TANK_SELECTOR_OFF`           | 0    |
| `FUEL_TANK_SELECTOR_ALL`           | 1    |
| `FUEL_TANK_SELECTOR_LEFT`          | 2    |
| `FUEL_TANK_SELECTOR_RIGHT`         | 3    |
| `FUEL_TANK_SELECTOR_LEFT_AUX`      | 4    |
| `FUEL_TANK_SELECTOR_RIGHT_AUX`     | 5    |
| `FUEL_TANK_SELECTOR_CENTER`        | 6    |
| `FUEL_TANK_SELECTOR_CENTER2`       | 7    |
| `FUEL_TANK_SELECTOR_CENTER3`       | 8    |
| `FUEL_TANK_SELECTOR_EXTERNAL1`     | 9    |
| `FUEL_TANK_SELECTOR_EXTERNAL2`     | 10   |
| `FUEL_TANK_SELECTOR_RIGHT_TIP`     | 11   |
| `FUEL_TANK_SELECTOR_LEFT_TIP`      | 12   |
| `FUEL_TANK_SELECTOR_CROSSFEED`     | 13   |
| `FUEL_TANK_SELECTOR_CROSSFEED_L2R` | 14   |
| `FUEL_TANK_SELECTOR_CROSSFEED_R2L` | 15   |
| `FUEL_TANK_SELECTOR_BOTH`          | 16   |
| `FUEL_TANK_SELECTOR_EXTERNAL_ALL`  | 17   |
| `FUEL_TANK_SELECTOR_ISOLATE`       | 18   |

{{< /table-wrapper >}}

</div>