AIRM: "ICAOAircraftTypeCode" https://airm.aero/developers/advanced-search/1.0.0/ICAOAircraftTypeCode?model=ConceptualModelFIXM: "AircraftTypeICAOCode" https://fixm.aero/releases/EURO_Ext-1.0/Europe_A-CDM_FIXM_Extension_v1.0_CM_D.pdf