Division 4.4.2

The manufacturer shall demonstrate to the satisfaction of the approval authority that the declared EDP category is appropriate. Data to support a manufacturer's choice of EDP category, for a given engine family, may include but are not limited to:

• surveys of the life spans of the equipment in which the subject engines are installed,

• engineering evaluations of field aged engines to ascertain when engine performance deteriorates to the point where usefulness and/or reliability is impacted to a degree sufficient to necessitate overhaul or replacement,

• warranty statements and warranty periods,

• marketing materials regarding engine life,

• failure reports from engine customers, and

• engineering evaluations of the durability, in hours, of specific engine technologies, engine materials or engine designs.