Avionics DevelopmentWT21 DevelopmentWT21 Plugin APIMFD Plugin APIEnumerationsFmcSimVarsOn this pageEnumeration: FmcSimVars Defined in: wtlinesdk/publishers/FmcSimVars.ts:14 FMC Simvar Definitions. Enumeration Members FmcExecActive FmcExecActive: "L:FMC_EXEC_ACTIVE" Defined in: wtlinesdk/publishers/FmcSimVars.ts:16 FMC Exec State.