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Occurrence Category Taxonomy
From SKYbrary Wiki
| Article Information | ||
|---|---|---|
| Category: | ICAO ADREP | 
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| Content source: | ICAO | 
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| Content control: | ICAO |
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Definition
The ADREP Occurrence category taxonomy is a set of terms used by ICAO to categorize aircraft accidents and incidents and allow safety trend analysis on these categories. The ADREP Occurrence category taxonomy is part of the ICAO accident reporting system (ADREP).
Terms
The terms of this taxonomy are grouped into primary and secondary terms. Every occurrence should have attached a single primary occurrence category but may be attached in addition multiple secondary terms. For accidents, the primary term can be considered as the end state in comparison with the IATA taxonomy.
| Primary (15) | |
| Term | Acronym |
| Abnormal runway contact | ARC |
| Birdstrike | BIRD |
| Controlled flight into or toward terrain | CFIT |
| Collision with obstacle(s) during take-off and landing | CTOL |
| Fire/smoke (non-impact) | F-NI |
| Ground Collision | GCOL |
| Loss of control - inflight | LOC-I |
| Airprox/ ACAS alert/ loss of separation/ (near) midair collisions | MAC |
| Ground Handling | RAMP |
| Runway excursion | RE |
| Runway - wildlife presence | RI-A |
| Runway incursion - vehicle, aircraft or person | RI-VAP |
| System/component failure or malfunction [non-powerplant] | SCF-NP |
| Powerplant failure or malfunction | SCF-PP |
| Undershoot/overshoot | USOS |
| Secondary (18) | |
| ATM/CNS | ATM |
| Loss of control - ground | LOC-G |
| Turbulence encounter | TURB |
| Fuel related | FUEL |
| Aerodrome | ADRM |
| Low altitude operations | LALT |
| Fire/smoke (post-impact) | F-POST |
| Windshear or thunderstorm | WSTRW |
| Icing | ICE |
| Evacuation | EVAC |
| Security related | SEC |
| Cabin safety events | CABIN |
| Abrupt manoeuvre | AMAN |
| Loss of lifting conditions en-route | LOLI |
| Unintended flight in IMC | UIMC |
| Glider towing related events | GTOW |
| External load related occurrences | EXTL |
| Unknown or undetermined | UNK |
Relations with other taxonomies
IATA maintains a taxonomy for accidents. The terms used inside that taxonomy can be mapped to the primary terms of the ADREP occurrence category taxonomy, bearing in mind that the ADREP occurrence category taxonomy also covers incidents, whereas the IATA taxonomy only concerns end states meaning accidents.
Multiple categories of one taxonomy sometimes match one category of the other taxonomy, but still allow comparison.
| ADREP Term (15) | IATA Term (11) |
| Controlled flight into or toward terrain | Controlled flight into Terrain |
| Abnormal runway contact | Gear-up landing / Gear Collapse |
| Hard Landing | |
| Tail Strike | |
| Ground Collision | Ground damage |
| Ground Handling | |
| Birdstrike | In-flight damage |
| Fire/smoke (non-impact) | |
| Collision with obstacle(s) during take-off and landing | |
| System/component failure or malfunction [non-powerplant] | |
| Powerplant failure or malfunction | |
| Loss of control - inflight | Loss of Control In-Flight |
| Airprox/ ACAS alert/ loss of separation/ (near) midair collisions | Mid-air collision |
| Runway - wildlife presence | Runway collision |
| Runway incursion - vehicle, aircraft or person | |
| Runway excursion | Runway excursion |
| Undershoot/overshoot | Undershoot |
Rules
There are currently no rules set within this taxonomy or in relation with other ADREP taxonomies.
However, by the end of 2010 and following an analysis of the current ADREP data, ICAO may add rules to make the primary occurrence category mandatory and unique for occurences where the occurrence class is "accident".