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It is understood that recognizing aircraft engines by grouping key identification characteristics, such as aircraft engine make, model, submodel, or category (for example, turbine), assists in the air traffic control, aircraft registration, aircraft engine certification, accident and incident investigation, safety analysis, and other functions.  Establishing a standard nomenclature facilitates efficient and effective communications throughout the industry and throughout the world. 
Additionally, uniform standard aircraft engine groupings and individual aircraft engine identifiers will: 
. Overcome difficulties in merging data from diverse information systems (for example, international and domestic sources or public and private sources). 

. Reduce costs to merge and transform aircraft engine data. 

. Enlarge the range and depth of aircraft engine information available for analysis. 

. Reduce duplicate or multiple identifiers for the same aircraft engine, which increases the integrity of information available. 

. Establish more useful and meaningful data that is defined and managed consistently. 

It is important to note that CICTT does not expect governments, international organisations, and corporations to immediately change existing data systems or existing definitions.  The intent is to provide “target” taxonomies and definitions so that as organisations make plans for, and implement new safety systems, these new taxonomies and definitions are adopted. 
The purpose of this paper is to provide a brief set of key definitions to be used in providing an international data standard for uniquely identifying groupings of aircraft engines.  An aircraft engine grouping includes those groupings of aircraft engines by one manufacturer, an aircraft engine model, an aircraft engine submodel, or aircraft engine type certificate.  This document is supplemented by technical documents further elaborating on the design of the system to support this international data standard. 
This document contains the results of the CICTT regarding common taxonomies and definition of Engine Make/Model/Submodel.  The aircraft engine sub-team is a subcommittee of the CICTT and is co-chaired by Diana Young of the U.S. Federal Aviation Administration (FAA) and Philip Champion-Demers of Transport Canada with the support of Deborah Kane from the FAA. Additional organisations involved in the sub-team include; Bureau d’Enquêtes et d’Analyses pour la Sécurité de l’Aviation Civile of France; General Aviation Manufacturers Association; Transport Canada; the Transportation Safety Board of Canada, and the U.K. Civil Aviation Authority. 
Contact point for all CICTT work: 
 
CICTT@intlaviationstandards.org
 
   2  SCOPE 
The CICTT decided to expand the aircraft make, model, and series groupings by establishing an international standard for aircraft engine make, model, and submodel groupings.  The CICTT adds aircraft engines that could be installed on the aircraft in the CICTT list.  The CICTT adds new aircraft engine valid values as information is provided or researches aircraft engine valid values with the following priority: 
　
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