The iron and sulphur still behave like iron and sulphur in the mixture, but iron sulphide has different properties from both iron and sulphur. You can separate the iron from the mixture using a magnet but this does not work for iron sulphide. 1  Page.
Search for: An Airworthiness Directive (A.D.) is a directive issued when the FAA realizes that a perilous condition exists in a product (aircraft engine, airframe, appliance or propeller). They notify aircraft operators and owners of potentially unsafe conditions that need special inspections, alterations, or repairs.
Samples in periodicals archive: As the commander in Afghanistan, I retained administrative control (ADCON) and operational control (OPCON) of all JET and IA Airmen assigned to US Air Forces Central Command (USAFCENT) in the Combined Joint Operating Area-Afghanistan.amples in periodicals archive: As the commander in Afghanistan, I retained administrative control (ADCON) and operational control (OPCON) of all JET and IA Airmen assigned to US Air Forces Central Command (USAFCENT) in the Combined Joint Operating Area-Afghanistan.