31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

een corrupted (e.g. making use of a Cyclic Redundancy Check (CRC)).Complying with the aircraft manufacturers recommendations and utilising therecommended tooling could achieve this.4.5.1 Media Distribution of FLS or DFLDIf the FLS or DFLD is to be supplied using diskettes, CD-ROMs orPCMCIA cards the following should be considered:(a)(b)(c)The FLS or DFLD should be virus checked upon receipt andstored in a controlled location if not being immediately loadedonto an aircraft system. (This requirement assumes that themedia store has appropriate protections and controls to preventunauthorised access to the media. If this is in any doubt, theFLS or DFLD should be virus checked immediately prior toloading it onto an aircraft system). The Target Hardwaremanufacturer should provide guidance on how this viruschecking should be accomplished.The method of transportation should be appropriate to ensurethat it does not result in damage or corruption of the storagemedia or FLS or DFLD. If this is in any doubt, the FLS orDFLD should not be loaded onto an aircraft system.The FLS or DFLD should be accompanied by the appropriaterelease paperwork, as stated in paragraph 3.4.5.2 Electronic Distribution of FLS or DFLDElectronic distribution is increasingly being utilised to transfer FLS orDFLD from the supplier to an operator. The obvious advantages ofthis are the speed of distribution and the removal of the need forphysical transport media. This should be accomplished to anacceptable standard (See Appendix No. 1 Paragraph 1). Such anacceptable standard would normally be that of meeting the intent of theguidance in this Notice. If the FLS or DFLD is supplied over theInternet this should be accomplished in accordance with a proceduredetailed in Appendix No. 1 Paragraph 1.3.5 FLS and DFLD Storage Media HandlingThe operator is responsible for ensuring the suitability of any storage media used. Inorder to ensure FLS and DFLD integrity, the storage media should be kept andprocessed in an environment that is not detrimental to that storage media, noting anylimitations associated with that media. Additional information may be found inAppendix No. 1.AN-43 P.730 September 2005