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.
- 13 -. Final Safety Oversight Audit Report â EASA January 2009 3.6.13 Regulation (EC) No 1702/2003 of 24 September 2003, Part 21, Subpart H (âAirworthiness Certificatesâ) outlining the requirements for the issuance of individual Certificates of Airworthiness came into effect on 28 September 2004.