ED Decision 2014/004/R
For the purpose of this CS, the following terms mean:
(a) ‘Applicant’: an applicant for, or a holder of, a type certificate (TC), change approval or supplemental type certificate (STC), applying for the approval by the European Aviation Safety Agency (hereinafter referred to as ‘the Agency’) of the Operational Suitability Data (OSD) related to MMEL.
(b) ‘Calendar Day’: a 24-hour period from midnight to midnight based on either UTC or local time, as selected by the operator.
(c) ‘Catastrophic Failure Condition’: as defined in the applicable Type Certification Basis.
(d) ‘Day of discovery’: the calendar day when a malfunction was recorded in the aircraft maintenance record/log book.
(e) ‘End user’: an operator or training organisation having a Minimum Equipment List (MEL) based on the MMEL approved by the Agency.
(f) ‘External Event’: an occurrence which has its origin distinct from the aircraft or the system being examined, such as atmospheric conditions (e.g. wind gusts/shear, temperature variations, icing, lightning strikes), operating environment (e.g. runway conditions, conditions of communication, navigation and surveillance services), cabin and baggage fires, and bird strike.
(g) ‘Flight Day’: a 24-hour period from midnight to midnight based on either UTC or local time, as selected by the operator, during which at least one flight is initiated for the affected aircraft.
(h) ‘Hazardous Failure Condition’: as defined in the applicable Type Certification Basis.
(i) ‘Inoperative’: an item which does not accomplish its intended purpose or is not consistently functioning within its approved operating limits or tolerances.
(j) ‘Item’: a component, instrument, equipment, system or function.
(k) ‘Rectification Interval (RI)’: a limitation on the duration of operations with inoperative items.
EASA aviation regulations define key terms for Master Minimum Equipment Lists (MMEL). These include applicant, calendar day, catastrophic/hazardous failure, discovery day, end user, external event, flight day, inoperative item, and rectification interval. These definitions ensure consistent understanding and application of aircraft operational suitability data.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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