Avionics DevelopmentWT21 DevelopmentWT21 Plugin APIShared Plugin APIEnumerationsFmcSimVarsOn this pageEnumeration: FmcSimVars Defined in: workingtitle-instruments-wt21/shared/FmcSimVars.ts:14 FMC Simvar Definitions. Enumeration Members FmcExecActive FmcExecActive: "L:FMC_EXEC_ACTIVE" Defined in: workingtitle-instruments-wt21/shared/FmcSimVars.ts:16 FMC Exec State.