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TAILPIPE FIRE (SCF–PP–TPF) ____________________________________________________________ 8
UNCONTAINED (SCF–PP–UNC) __________________________________________________________ 9
Page Revised 5/2011 Page iii
Page Revised 4/2011 Page 1
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.
To accomplish its objectives, CICTT has developed the following common taxonomies and
definitions: Phase of Flight; Occurrence Categories; Aircraft Make/Model/Series tables; Engine
Make/Model tables; and a detailed taxonomy for accident/incident data systems.
It is important to note that CICTT does not expect governments, international organizations, and
corporations to immediately change existing data systems or existing definitions. The intent is to
provide “target” taxonomies and definitions for adoption by organizations planning for, and
implementing new safety systems.
“Occurrence” is defined as “accident or incident” throughout this document. Generally,
accidents and incidents differ only in the degree of injury sustained by persons involved or in
damage sustained to the aircraft. Each category has a unique name and identifier to permit
common coding in accident/incident systems, a text definition, and usage notes to further clarify
the category and aid in coding occurrences. This version focuses on powered fixed-wing land
and rotorcraft operations. Future updates will cover other aircraft operations.
An important element of the occurrence category design is that it permits the association of
multiple categories with an occurrence. Meaning, for example, if a flammable fluid leak
contributed to a propulsion system fire, the occurrence would be coded in both categories.
Multiple coding supports the primary focus of CICTT—accident prevention—in which every
pertinent element should be investigated, recorded, and analyzed.
The System/Component Failure or Malfunction (Powerplant) (SCF–PP) Sub-Category
Definitions and Usage Notes (subject of this release) are intended to provide CICTT users with a
　
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