I am trying to trigger some instrument panel failures as an experiment but can't get it to work. In snippets this is more or less what I have done, I am using C# managed code.

enum DEFINITIONS {
   PlaneLocationDR,
   AirspeedGaugeFailureDR
}

enum DATA_REQUESTS {
   RequestLocation
}

public enum GaugeStateMode   // values as in the SimConnect SDK
    {
        OK = 0,
        Fail = 1,
        Blank = 2
    }

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
struct AirspeedGaugeDR
{
    GaugeStateMode AirspeedGaugeStatus;

    static void Register(SimConnect simconnect)
    {
        simconnect.AddToDataDefinition(DEFINITIONS.AirspeedGaugeFailureDR, 
                SimVars.PARTIAL_PANEL_AIRSPEED, // "PARTIAL PANEL AIRSPEED"
                SimUnits.NUMBER,                // "number"
                SIMCONNECT_DATATYPE.INT32, 
                0.0f, 
                SimConnect.SIMCONNECT_UNUSED);

        simconnect.RegisterDataDefineStruct<AirspeedGaugeDR>(DEFINITIONS.AirspeedGaugeFailureDR);
    }
}

Since the "PARTIAL PANEL AIRSPEED" description on the SDK, like all the other partial panel failures is defined as type "Enum"  I chose to use "NUMBER" as SimConnect unit because there seems to be no "Enum" unit. I also chos INT32 as I think the enum is 32 bits. Correct me if I am wrong in any of the assumptions.

 

So then in the code I create my SimConnect object and when I want to trigger the Airspeed Indicator failure I do this:

// Initialization
SimConnect simconnect = new SimConnect("FSX Test", this.appWindowHandle, WM_USER_SIMCONNECT, null, 0);
// registered for OnRecvOpen/Quit/Exception/Event/OnRecvSimobjectDataBytype/OnRecvSimobjectData
AirspeedGaugeDR.Register(simconnect);
// Then elsewhere in the code
// Now trigger the failure
AirspeedGaugeDR setdata = new AirspeedGaugeDR();
setdata.AirspeedGaugeStatus = GaugeStateMode.Fail; // 1
simconnect.SetDataOnSimObject(DEFINITIONS.AirspeedGaugeFailureDR, 
        (uint)SIMCONNECT_SIMOBJECT_TYPE.USER, 
        SIMCONNECT_DATA_SET_FLAG.DEFAULT, 
        setdata);

The application can connect/disconnect/receive events and event updates, send data requests but I can't get this (panel failure) to work.

 

This is what the SDK says:

 

Simulation Variable Description                                     Units   Settable Multiplayer

----------------------------------------------------------------------------------------------------

PARTIAL PANEL ADF Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL AIRSPEED Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL ALTIMETER Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL ATTITUDE Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL COMM Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL COMPASS Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL ELECTRICAL Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL AVIONICS Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum N -

PARTIAL PANEL ENGINE Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL FUEL INDICATOR Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum N

PARTIAL PANEL HEADING Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL VERTICAL VELOCITY Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL TRANSPONDER Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL NAV Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL PITOT Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y -

PARTIAL PANEL TURN COORDINATOR Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum N -

PARTIAL PANEL VACUUM Gauge fail flag (0 = ok, 1 = fail, 2 = blank) Enum Y

 

Events (Aircraft Failures)

Event ID                        String Name             Description                     Multiplayer

KEY_TOGGLE_VACUUM_FAILURE TOGGLE_VACUUM_FAILURE Toggle vacuum system failure Shared Cockpit

KEY_TOGGLE_ELECTRICAL_FAILURE TOGGLE_ELECTRICAL_FAILURE Toggle electrical system failure Shared Cockpit

KEY_TOGGLE_PITOT_BLOCKAGE TOGGLE_PITOT_BLOCKAGE Toggles blocked pitot tube Shared Cockpit

KEY_TOGGLE_STATIC_PORT_BLOCKAGE TOGGLE_STATIC_PORT_BLOCKAGE Toggles blocked static port Shared Cockpit

KEY_TOGGLE_HYDRAULIC_FAILURE TOGGLE_HYDRAULIC_FAILURE Toggles hydraulic system failure Shared Cockpit

KEY_TOGGLE_TOTAL_BRAKE_FAILURE TOGGLE_TOTAL_BRAKE_FAILURE Toggles brake failure (both) Shared Cockpit

KEY_TOGGLE_LEFT_BRAKE_FAILURE TOGGLE_LEFT_BRAKE_FAILURE Toggles left brake failure Shared Cockpit

KEY_TOGGLE_RIGHT_BRAKE_FAILURE TOGGLE_RIGHT_BRAKE_FAILURE Toggles right brake failure Shared Cockpit

KEY_TOGGLE_ENGINE1_FAILURE TOGGLE_ENGINE1_FAILURE Toggle engine 1 failure        Shared Cockpit

KEY_TOGGLE_ENGINE2_FAILURE TOGGLE_ENGINE2_FAILURE Toggle engine 2 failure        Shared Cockpit

KEY_TOGGLE_ENGINE3_FAILURE TOGGLE_ENGINE3_FAILURE Toggle engine 3 failure        Shared Cockpit

KEY_TOGGLE_ENGINE4_FAILURE TOGGLE_ENGINE4_FAILURE Toggle engine 4 failure        Shared Cockpit