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

and paragraph 11.4 of Document DO-178B/ED-12B, will be requiredas a means of software identification and change control to be effectivethroughout the life of the equipment.3.1.3 Organisations approved by the Director-General in accordance withHKAR-1 Section 1.8 will need to ensure that their design and qualityassurance procedures are appropriate for the software aspects of thework undertaken. These procedures should form part of the Expositionof the Organisation.3.2 Post-Certification Modifications3.2.1 Modifications to software will be subject to the same approvalprocedures as are applied to hardware modifications (see relevantSection of HKAR-1). Modified software will need to be identifiedand controlled in accordance with the procedures stated in the SoftwareConfiguration Management Plan. The guidance material given inDocument DO-178B/ED-12B (or an agreed equivalent standard) may beused as a basis for the approval of software modifications.NOTE: The term "maintenance" is often used by software specialists whenreferring to modifications to software.3.2.2 The Director-General will require the design and investigation ofmodifications, including those proposed by the aircraft operator, toinvolve the support service provided by the responsible DesignOrganisation. The re-certification effort will need to be related to theSoftware Levels. Experience has shown that an aircraft operator isunlikely to justify the establishment of its own software designcapability. Therefore, where the software is classified in Level A,Level B or Level C, the aircraft, engine or propeller constructor, asappropriate, would normally be the responsible Design Organisation forcertification purposes, although related tasks may be delegated toequipment manufacturers or software organisations.3.2.3 Aircraft operators will need to ensure that their defect reportingprocedures will report software problems to the responsible DesignOrganisation.4 Software Documentation4.1 The documentation to be made available to the certifying authority is listed inDocument DO-178B/ED-12B.4.2 Where the Director-General is validating an approval granted to a system orequipment by an airworthiness authority other than the Director-General, theDirector-General will notify the applicant which documents are to be submitted.In many cases, a reasonably comprehensive Accomplishment Summary, asoutlined in paragraph 11.20 of DO-178B/ED-12B, may suffice. Guidance onthe preparation of an Accomplishment Summary is given in Appendix 2 to thisAN-45A P.331 January 2003