Defect
Any confirmed abnormal condition of an item whether or not this could eventually result in a failure. Defect, Major
A defect in relation to an aircraft that may affect the safety of the aircraft or cause the aircraft to become a danger to person or property.
Deferred
A condition whereby required maintenance action has not been accomplished and is scheduled to be completed at a specific time in the future.
Equivalent Terms: MEL, Hold Item
De-Icing
A process for removal of ice, snow, slush or frost from the aircraft surfaces.
De-icing/Anti-icing
A process that combines both de-icing and anti-icing, which can be performed in one or two steps.
De-/Anti-icing Programme
A programme approved by the Authority that requires an Operator to comply with the Clean Aircraft Concept. A typical programme includes a management plan, de-icing/anti-icing procedures; holdover times, aircraft inspection and reporting procedures, and training and testing.
Equivalent Terms: De-icing/Anti-icing Programme Defect Reporting
The official reporting of significant aircraft, aircraft engine and aircraft component defects to the Authority, the Type Certificate Holder and the engine or component manufacturer.
Equivalent Terms: Major Defect Reporting (MDR), Significant Defect Reporting (SDR)
Departure Control System (DCS)
An automated method of performing check-in, capacity and load control, and dispatch of flights. Deportee
A person who had legally been admitted to a state by its authorities or who had entered a state illegally, and who at some time later is formally ordered by the competent authorities to leave that state.
Designated Airworthiness Representative (DAR)
A person specifically approved by the FAA to act on its behalf for the approval of Airworthiness matters.
Designated Engineering Representative (DER)
A person specifically approved by the FAA to act on its behalf for the approval of Engineering matters. Designated Land Areas
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