| ACESN_NBR | ACCESSION NUMBER | The accession number of the event. NOTE: This is a unique ASRS incident tracking number and the primary reference link for the ASIAS database. |
| ACFT_SEQ | AIRCRAFT SEQUENCE | The number that identifies the sequence of each aircraft in the event (i.e., 1 = first aircraft, 2 = second aircraft, etc.). |
| ACFT_MKMD_DESC | AIRCRAFT MAKE MODEL DESCRIPTION | Indicates the attributes of the aircraft involved in the event. NOTE: This field is not standardized |
| ACFT_CREW_QTY | AIRCRAFT CREW QUANTITY | The number of crew aboard the aircraft at the time of the event. |
| FLT_CNDCT_DESC | FLIGHT CONDUCT DESCRIPTION | Indicates the Federal Aviation Regulation (FAR) that the flight was conducted under at the time of the event. NOTE: This field is not standardized. |
| FLT_PURPOSE_DESC | FLIGHT PURPOSE DESCRIPTION | Indicates the purpose of the flight. NOTE: This field is not standardized. |
| FLT_OPN_TYPE_COMMON_CARR_DESC | FLIGHT OPERATIONS TYPE COMMON CARRIER DESCRIPTION | Indicates the type of commercial operation being conducted at the time of the event. |
| FLT_OPN_TYPE_GA_DESC | FLIGHT OPERATIONS TYPE GENERAL AVIATION DESCRIPTION | Indicates the type of general aviation operation being conducted at the time of the event. |
| FLT_OPN_OTR_DESC | FLIGHT OPERATIONS OTHER DESCRIPTION | Indicates the type of flight operation being conducted at the time of the event (other than general aviation or commercial operations). |
| PSGR_TOTAL_QTY | PASSENGER TOTAL QUANTITY | The total number of passengers aboard the aircraft at the time of the event. |
| FLT_PHASE_CLIMBOUT_DESC | FLIGHT PHASE CLIMBOUT DESCRIPTION | Indicates the point of "climb out" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_CLIMBOUT_OTR_DESC | FLIGHT PHASE CLIMBOUT_ OTHER DESCRIPTION | Further describes the FLT PHASE CLIMBOUT DESC field or, if this field is blank, describes another point of "climb out" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_CRZ_DESC | FLIGHT PHASE CRUISE DESCRIPTION | Indicates the point of "cruise" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_CRZ_OTR_DESC | FLIGHT PHASE CRUISE OTHER DESCRIPTION | Further describes the FLT PHASE CRZ DESC field or, if this field is blank, describes another point of "cruise" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_DCSNT_DESC | FLIGHT PHASE DESCENT DESCRIPTION | Indicates the point of "descent/approach" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_DSCNT_OTR_DESC | FLIGHT PHASE DESCENT OTHER DESCRIPTION | Further describes the FLT PHASE DSCNT DESC field or, if this field is blank, describes another point of "descent/approach" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_GND_DESC | FLIGHT PHASE GROUND DESCRIPTION | Indicates the point of "ground activity" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_GND_OTR_DESC | FLIGHT PHASE GOUND OTHER DESCRIPTION | Further describes the FLT PHASE GND DESC field or, if this field is blank, describes another point of "ground activity" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_LNDG_DESC | FLIGHT PHASE LANDING DESCRIPTION | Indicates the point of "landing" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_LNDG_OTR_DESC | FLIGHT PHASE LANDING OTHER DESCRIPTION | Further describes the FLT PHASE LNDG DESC field or, if this field is blank, describes another point of "landing" that the event occurred. NOTE: This field is not standardized. |
| FLT_PHASE_OTR_DESC | FLIGHT PHASE OTHER DESCRIPTION | Further describes the FLT PHASE DESC fields or, if these field are blank, describes another phase of flight that the event occurred. NOTE: This field is not standardized. |
| ASP_CLASS_A_CODE | AIRSPACE CLASS A CODE | The Class A facility identifier. NOTE: Class A airspace used to be known as Positive Controlled Airspace (PCA). |
| ASP_CLASS_B_CODE | AIRSPACE CLASS B CODE | The Class B facility identifier. NOTE: Class B airspace used to be known as Terminal Controlled Airspace (TCA). |
| ASP_CLASS_C_CODE | AIRSPACE CLASS C CODE | The Class C facility identifier. NOTE: Class C airspace used to be known as Airport Radar Surveillance Areas (ARSA). |
| ASP_CLASS_D_CODE | AIRSPACE CLASS D CODE | The Class D facility identifier. NOTE: Class D airspace used to be known as Airport Traffic Areas (ATA) and Control Zones (CZ) with operating control towers. |
| ASP_CLASS_E_CODE | AIRSPACE CLASS E CODE | The Class E facility identifier. NOTE: Class E airspace used to be known as Controlled Airspace, which included all federal airways, continental control areas, control area extensions, control z |
| ASP_CLASS_G_CODE | AIRSPACE CLASS G CODE | The Class G facility identifier. NOTE: Class G airspace used to be known as Uncontrolled Airspace. |
| ASP_SUA_CODE | AIRSPACE CLASS SPECIAL USE | The Special Use Airspace (SUA) identifier. |
| ASP_TEMP_USE_DESC | AIRSPACE CLASS TEMPORARY USE DESCRIPTION | Indicates the airspace involved in the event was under Temporary Use. |
| ACFT_INVL_DESC | AIRCRAFT INVOLVED DESCRIPTION | Indicates the nature of the event. |