POSITIVE TAXONOMY DEFINITIONS AND USAGE NOTES
May 2011 (1.0)
The Positive Taxonomy aims at better identifying all the technical and human factors safety nets and assessing the effectiveness of each one. It considers the human factor as a safety factor and enables recording the functioning of effective system safety nets and successful human interventions.
Version 1.0 Page ii
May 2011
RECORD OF REVISIONS Date Version Section Revision
5/2011
1.0
Document Creation
Version 1.0 Page iii
May 2011
TABLE OF TERMS
DECISION___________________________________________________________________________ 2
Avoidance Manoeuvre ______________________________________________________________ 2
Decision to Go-Around ______________________________________________________________ 2
Decision to Land as Precaution________________________________________________________ 2
Decision to Land on an Unexpected Runway _____________________________________________ 2
Decision to Reject Takeoff ___________________________________________________________ 2
Decision to Return to Departing Point or to Divert ________________________________________ 3
EXTERNAL INTERVENTION _____________________________________________________________ 4
Aerodrome Intervention/Assistance ___________________________________________________ 4
Air Traffic Intervention/Assistance _____________________________________________________ 4
Assistance of an Instructor/Supervisor _________________________________________________ 4
Passenger Intervention/Assistance ____________________________________________________ 4
Third Party Intervention/Assistance ____________________________________________________ 4
HARDWARE SAFETY NET ______________________________________________________________ 5
PROVIDENCE ________________________________________________________________________ 6
SOFT SAFETY NET ____________________________________________________________________ 7
Accurate Usage of Documentation_____________________________________________________ 7
Communications ___________________________________________________________________ 7
Design Requirements _______________________________________________________________ 7
Engine Failure Anticipation ___________________________________________________________ 7
Environment Observation ___________________________________________________________ 7
Logical Problem Solving _____________________________________________________________ 8
Use of Training Instructions/SOPs _____________________________________________________ 8
Visual Detection/Anticipation ________________________________________________________ 8
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May 2011
INTRODUCTION
The International Civil Aviation Organization (ICAO) and the Commercial Aviation Safety Team (CAST), which includes Government officials and aviation industry leaders, have jointly chartered the CAST/ICAO Common Taxonomy Team (CICTT). The team was charged with developing common taxonomies and definitions for aviation accident and incident reporting systems. The common taxonomies and definitions are intended to improve the aviation community’s capacity to focus on common safety issues. CICTT includes experts from air carriers, aircraft manufacturers, engine manufacturers, pilot associations, regulatory authorities, transportation safety boards, and ICAO, and members from Canada, the European Union, France, Italy, Japan, the Netherlands, the United Kingdom, and the United States. CICTT is co-chaired by a representative from ICAO and a representative from CAST.
　
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