U.S. DEPARTMENT OF TRANSPORTATION ORDER CHANGE FEDERAL AVIATION ADMINISTRATION 8110.49 CHG 2 Effective Date: National Policy 4/10/2017 SUBJ: Software Approval Guidelines 1. Purpose. This change transmits revised pages to Order 8110.49 Chg 1, Software Approval Guidelines. This change is issued to: a. Delete part of chapter 2 to allow flexibility in conducting software reviews. b. Delete chapter 3 to allow alignment with risk-based directives in Order 8040.4A. c. Replace Appendix 1 with Appendix A with worksheets taken from the deleted chapter 3. d. Delete Appendices 2 – 4 which were examples related to chapter 3. e. Update document references only in Chapters 1 and 2 to reflect current versions, where applicable. 2. Who this change affects. Managers and staff of the Federal Aviation Administration (FAA) Aircraft Certification Service (AIR), including any persons designated by the Administrator, and organizations associated with the aircraft certification process required by Title 14 of the Code of Federal Regulations (14 CFR). 3. Disposition of Transmittal Paragraph. Retain this transmittal sheet until the directive is cancelled by a new directive. PAGE CHANGE CONTROL CHART Remove Pages Dated Insert Pages Dated i 9/28/11 i iv 9/28/11 iv Chapter 1 (1 thru 8) 9/28/11 Chapter 1 (1 thru 7) Chapter 2 (9 thru 10) 6/3/03 Chapter 2 (8 thru 10) Chapter 2 (11 thru 20) 6/3/03 Deleted Distribution: Electronic Only Initiated By: AIR-100 4/10/17 8110.49 Chg 2 PAGE CHANGE CONTROL CHART (CONTINUED) Remove Pages Dated Insert Pages Dated Chapter 3 (21 thru 22) 6/3/03 Deleted Chapter 3 (23 thru 27) 9/28/11 Deleted Chapter 3 (28) 6/3/03 Deleted Appendix 1 (A1-1) 9/28/11 Appendix A (A-1 thru A-4) Appendix 2 (A2-1) 9/28/11 Deleted Appendix 3 (A3-1) 9/28/11 Deleted Appendix 3 (A3-2) 9/28/11 Deleted Appendix 4 (A4-1) 9/28/11 Deleted Appendix 5 (A5-1) 9/28/11 Appendix B (B-1) Susan J. M. Cabler Acting Manager, Design, Manufacturing, & Airworthiness Division Aircraft Certification Service 4/10/17 8110.49 Chg 2 Table of Contents Chapter 1. Introduction................................................................................................................ 1 1-1. Purpose ........................................................................................................................ 1 1-2. Distribution .................................................................................................................. 1 1-3. Related Publications. ................................................................................................... 1 1-4. Cancellation ................................................................................................................. 3 1-5. Background. ................................................................................................................. 3 1-6. Software Topics Covered In This Order. ..................................................................... 3 1-7. Definitions ................................................................................................................... 4 1-8. Acronyms. ................................................................................................................... 7 1-9. Records Management. ................................................................................................. 7 1-10. Suggestions for Improvement ...................................................................................... 7 Chapter 2. Software Review Process ........................................................................................... 8 2-1. General. ....................................................................................................................... 8 2.2 Objectives of the Software Review Process. ............................................................... 8 Chapter 3. Reserved .................................................................................................................... 10 Chapter 4. Software Conformity Inspection ............................................................................ 29 4-1. General ...................................................................................................................... 29 4-2. Discussion ................................................................................................................. 29 4-3. Software Part Conformity Inspection. ....................................................................... 29 4-4. Software Installation Conformity Inspection. ............................................................ 30 4-5. Summary. ................................................................................................................... 32 Chapter 5. Approval of Field-Loadable Software (FLS) ........................................................ 33 5-1. General. ..................................................................................................................... 33 5-2. Approval of FLS. ....................................................................................................... 33 5-3. FLS Installation Considerations. ............................................................................... 35 5-4. Maintenance and Part Marking Considerations. ....................................................... 35 Chapter 6. Approval of Field-Loadable Software (FLS) by Finding Identicality Through the Parts Manufacturer Approval (PMA) Process .................................................................. 37 6-1. General. ..................................................................................................................... 37 6-2. Establishing Identicality. ........................................................................................... 37 6-3. Applicability to TSO. ................................................................................................ 39 Chapter 7. Approval of Airborne Systems and Equipment Containing User-Modifiable Software (UMS) ........................................................................................................................... 41 7-1. General. ..................................................................................................................... 41 7-2. Safety Considerations. ............................................................................................... 41 7-3. Considerations for Displayed Data. ........................................................................... 42 7-4. Modification of Aircraft Performance Parameters. ................................................... 42 7-5. Protection. .................................................................................................................. 42 7-6. Tools Used To Protect Non-Modifiable Components. .............................................. 43 i 4/10/17 8110.49 Chg 2 7-7. Data Requirements. ................................................................................................... 43 7-8. Other Considerations. ................................................................................................ 44 Chapter 8. Previously Developed Software (PDS) – Applying RTCA/DO-178B Level D Criteria ......................................................................................................................................... 45 8-1. General. ..................................................................................................................... 45 8-2. Five Misinterpreted Objectives. ................................................................................ 45 8-3. Approving Level D PDS. .......................................................................................... 47 Chapter 9. Qualification of Software Tools Using RTCA/DO-178B ..................................... 49 9-1. General. ..................................................................................................................... 49 9-2. Two Kinds of Tools That May Be Qualified. ............................................................ 50 9-3. Determining Whether A Tool Should Be Qualified. ................................................. 51 9-4. Determining Which Tool Qualification Criteria Apply. ........................................... 51 9-5. Guidelines for Data Submittal and Data Availability to Demonstrate Tool Qualification. ............................................................................................................. 52 9-6. Guidelines for Evaluating Acceptability of Tool Operational Requirements Data. .. 55 Chapter 10. Approval of Software Changes in Legacy Systems Using RTCA/DO-178B ... 59 10-1. General. ..................................................................................................................... 59 10-2. Discussion. ................................................................................................................ 60 10-3. Procedures. ................................................................................................................ 63 Chapter 11. Oversight of Software Change Impact Analyses Used to Classify Software Changes as Major or Minor ....................................................................................................... 67 11-1. General. ..................................................................................................................... 67 11-2. Discussion. ...............................................................................................................