5-5 manufacturer’s declared performance requirements to verify that the non- TSO function can reasonably be accommodated within the hosting TSO article. Manufacturers intending to integrate non-TSO functions in a proposed TSO article should plan accordingly and coordinate with their ACO at the earliest opportunity and well in advance of their TSO application, to avoid potential delays to their project. Use of a Partnership for Safety Plan (PSP) should be encouraged to formalize and adapt integrated non-TSO function to each manufacturer’s internal TSO procedures. Each project specific certification plan should address any specific ACO test and validation requirements.
Data Submittal. 5.5.3.2 Data submitted to the ACO to permit review of an NTF should include, as a minimum, the following:
5.5.3.2.1 A clear definition of the intended function and any anticipated operational credit that may be sought at the time of installation so your justification for the proposed hazard classification of failure condition(s) can be evaluated;
5.5.3.2.2 Your declared performance requirements. Where possible, you are encouraged to adopt existing industry-accepted standards, such as RTCA, European Organization for Civil Aviation Equipment (EUROCAE), SAE, or Aeronautical Radio, Incorporated (ARINC);
5.5.3.2.3 Your proposed test procedures to validate the performance requirements for the non-TSO function, including RTCA Document RTCA/DO-160 (revision level same as hosting TSO article) environmental test conditions;
5.5.3.2.4 Installation and operating instructions/limitations and maintenance instructions for the non-TSO function(s) as applicable;
5.5.3.2.5 If the TSO article includes software and/or complex custom airborne electronic hardware, your verification of the hosting TSO article’s software and/or airborne electronic hardware design assurance levels;
5.5.3.2.6 The manufacturer’s verification that the hosting TSO article’s software and hardware design assurance levels, including RTCA/DO-254 complex electronic hardware requirements in accordance with AC 20-152, RTCA, Inc., Document RTCA/DO-254, Design Assurance Guidance for Airborne Electronic Hardware, remain appropriate for the non-TSO function. If the non-TSO function includes software components, all RTCA/DO-178 (revision level same as hosting TSO article) software artifacts normally furnished to the ACO or retained by the manufacturer must clearly describe the non-TSO function software components and demonstrate compliance with the requirements of paragraph 5.5.3.2.3.
5-6 ACO Evaluation Criteria. 5.5.3.3 If, following early coordination with the ACO, it is determined the NTF is of a simple nature, where descriptive and substantiation data compliance with the MPS of the TSO is easily understandable, your NTF will be evaluated on a non-interference basis during the normal application process. However, the ACO will require a concurrent TC or STC project evaluation if it is determined that the added NTF(s):
5.5.3.3.1 Are complex and difficult to review and to fully understand without a concurrent installation evaluation;
5.5.3.3.2 Have a high degree of system flight deck to pilot interface;
5.5.3.3.3 Are of a simple nature individually, but combined in such a way or in sufficient quantities to become complex and difficult to review and fully understand without a concurrent installation evaluation; or
5.5.3.3.4 Incorporate new or novel technology.
Note: If a TC/STC project is being accomplished at an ACO that is different than the ACO responsible for issuing the TSOA, both offices will coordinate in the review of your declared NTF performance requirements.
NTF Acceptance and Installation Data. 5.5.3.4
5.5.3.4.1 The TSOA that the FAA letter issues to you documents the TSOA(s) being granted, including the integrated NTF that was evaluated by the ACO in conjunction with the hosting TSO article.
5.5.3.4.2 It is essential to note that the TSO article and any integrated NTF are inseparable at the article level, and should be covered by a common manufacturer’s hardware and/or software part number. The TSOA letter conveys design and production approval for the TSO function as well as design acceptance on a non-interference basis and production approval for the NTF. For example, if the TSO has MPS for functional performance, hardware and software design assurance, and environmental qualification, then the TSOA letter will also convey the ACO acceptance of your statement of conformance to these requirements for the NTF. Because the NTF is not covered under the TSO authority granted by § 21.603(a), AC 21-50 provides additional guidance for the acceptable use of TSO data for installation approval. The following additional information must be included in your article installation manual, component maintenance manual, and/or operating manual to support the aircraft installation approval requirements:
5.5.3.4.2.1 A description of the NTF, including key performance specifications, as well as qualification levels, such as software, hardware, and environmental;
5-7
5.5.3.4.2.2 Interface requirements for the NTF and applicable installation test procedures;
5.5.3.4.2.3 Installation and operating instructions/limitations and maintenance instructions for the NTF as applicable;
5.5.3.4.2.4 For NTFs that contribute to catastrophic or hazardous failure conditions on the aircraft, the manufacturer should also include a safety analysis of the NTF as implemented in the hosting TSO article. The safety analysis should identify the failure modes and effects of the NTF and the expected probability of the failure modes. The analysis should consider exposure times for latent failures, recommended maintenance checks, and the failure rates for the applicable components of the hosting TSO article.
Note: You should evaluate the integrated NTF contributing to major or lower failure conditions using the same procedures that are applied to any TSO article contributing to major or lower failure conditions.
Manufacturer Responsibilities. 5.5.3.5 With ACO acceptance of your data submitted in accordance with paragraph 3.1.2 of this AC, the NTF should be integrated and qualified using your existing configuration control and TSO qualification procedures. You should incorporate the NTF data within the required TSO application data provided to the ACO, including results of testing discussed in paragraph 5.5.3.2 of this AC. You should ensure the results of any TC/STC installation performance testing that may have been required by paragraph 3.8.4 are also available for review by the TSOA-issuing ACO.
Design Change/Modification to an Article that provides NTF(s). 5.5.3.6 Because the TSO article and any integrated NTFs are inseparable, all subsequent design changes to the components providing non-TSO functionality must be treated the same as design changes made to components providing TSO functionality (refer to § 21.619). You are responsible for 1) ensuring the changes to the NTF do not interfere with the article’s compliance with the TSO; 2) controlling the design and quality of the article, including the NTF data listed in the letter of TSOA; 3) evaluating the design changes pursuant to § 21.619 to ensure the article continues to comply with the TSO; and 4) evaluating the design changes to confirm the non-interference of the accepted NTF. If the design change is extensive enough to require a substantially complete investigation of compliance of the accepted NTF, you must obtain FAA approval before incorporating the change into your approved design. If the design change does not require a substantially complete investigation of compliance of the accepted NTF, you must report it when you report other minor design changes. See paragraph 4.4 of this AC for further details on design changes.
Appendix A A-1 APPENDIX A. LIST OF ACRONYMS
Acronym Definition AC Advisory Circular ACO Aircraft Certification Office AEH Airborne Electronic Hardware AIR Aircraft Certification Services ARINC Aeronautical Radio, Incorporated AS Aerospace Standards CAA Civil Aviation Authority COS Continued Operational Safety CMM Component Maintenance Manual DAH Design Approval Holder EASA European Aviation Safety Agency EFIS Electronic Flight Instrument System ELOS Equivalent Level of Safety EUROCAE European Organization for Civil Aviation Equipment FAA Federal Aviation Administration GPS Global Positioning System ICAO International Civil Aviation Organization LODA Letter Of Design Approval MIDO Manufacturing Inspection District Office MISO Manufacturing Inspection Satellite Office MPS Minimum Performance Standards NTF Non-TSO Function OPR Open Problem Report PMA Parts Manufacturer Approval QS Quality System RTCA Radio Technical Commission of Aeronautics SAE Society Automotive Engineers SOD State Of Design SOM State Of Manufacturing STC Supplement Type Certificate TC Type Certificate TSO Technical Standard Order TSOA Technical Standard Order Authorization TCAS Traffic Alert and Collision Avoidance System
Appendix B B-1 APPENDIX B. SAMPLE COMPLIANCE MATRIX The matrix in this appendix provides Technical Standard Order Authorization (TSOA) holders one example of what a compliance matrix may look like. It is only an example and does not provide a specific compliance method to any specific standard. Table B-1 below provides guidance regarding the sample compliance matrix.
Table B-1. Sample Compliance Matrix What is the purpose of this sample compliance matrix?
This sample compliance matrix was developed to help you demonstrate compliance with applicable regulations and standards.
How were the sample compliance matrix and the lists of applicable regulations developed?
Various matrices used by Aircraft Certification Offices (ACO) on past and present certification projects and current guidance materials were used to develop the sample compliance matrix and the lists of applicable regulations for Technical Standard Order (TSO) projects. However, these examples are for illustrative purposes only and are not based on any project submitted to the Federal Aviation Administration (FAA).
How should the sample matrix be filled in to generate a matrix specific to a project?
The sample compliance matrix for TSO articles is split into three parts:
Part 1 covers compliance with Title 14 of the Code of Federal Regulations (14 CFR) part 21. Refer to “Part 1: 14 CFR Part 21” below for an example of a completed part 21 compliance matrix.
Part 2 covers compliance with a TSO. Refer to “Part 2: Technical Standard Order (TSO)-CXXX” below for an example of a completed TSO compliance matrix.
Part 3 covers compliance with a minimum performance standard (MPS). Refer to “Part 3: Minimum Performance Standard (MPS)- ASxxxxx” for an example of a completed MPS compliance matrix.
Note: The MPS text was excluded from the example for copyright protection, but should be included in the actual matrix.
The following paragraphs describe the matrix entries, with the circled letters below matching the circled letters in the examples and templates.
Appendix B B-2 Part Number reference example Part 1 14 CFR Part 21 Sample Matrix This sample matrix is designed to facilitate demonstrating compliance to part 21. This matrix does not include all subparagraphs of part 21; only the regulations that require demonstration of compliance are listed. You should update the sample matrix in accordance with the instructions below.
Part 2 TSO Sample Matrix This sample matrix is designed to facilitate demonstrating compliance with a TSO. Complete this matrix in accordance with the instructions below. If the article complies with multiple TSOs, complete this matrix for each applicable TSO.
Part 3 Industry defined MPS Sample Matrix (SAE, RTCA, etc.)
This sample matrix is designed to facilitate demonstrating compliance with an MPS. Complete this matrix in accordance with the instructions below. If the article complies with multiple MPSs, complete this matrix for each applicable MPS.
Appendix B B-3 Table B-1. Sample Compliance Matrix (Continued)
Paragraph Number Reference paragraph number of applicable regulations, TSO, or MPS applicable to the matrix (TSO or MPS) being completed.
Paragraph Title/Text Reference paragraph title and text of applicable regulations, TSO, or MPS applicable to the matrix (TSO or MPS) being completed.
Amendment Level Reference amendment level of applicable regulations (CFR Matrix).
Methods of Compliance Enter the method or combination of methods used to show compliance with the regulations, TSO, and MPS. Make an entry for each regulation, paragraph, or subparagraph in the matrix. Columns may be changed/added to accommodate actual methods of compliance used.
Analysis (A) This method of compliance includes a quantitative or qualitative assessment, as appropriate, of structures, systems, and components.
An analysis may be a precursor to tests and a validation of the design.
An analysis should be validated using published previous experience or appropriate testing to be accepted for showing compliance to the requirements.
Design (D) This method of compliance encompasses the inherent features of structures, systems, or components. Inspection of hardware, the drawings, the bill of materials, or other documentation such as material specifications shows compliance with the applicable requirements.
Test (T) This method of compliance is a test of the article. The specific test conditions need to be defined in the documentation supporting the test.
Similarity (S) This method of compliance is a comparison between a previously approved design controlled by the applicant and the proposed design.
The intent is to show that these designs are the same in all ways relative to showing compliance with the applicable MPS, so the proposed design will perform the same or better than the previously approved design.
The applicant should account for any differences in the requirements if the revision levels of the TSO are not the same for the two designs.
Refer to the other guidance applicable to the different MPS to determine if similarity is proper.
a b c d
Appendix B B-4 Other (O) Specify any other method used to demonstrate compliance.
Enter the plan, drawing, and report numbers used to document the showing of compliance with the requirement. The items referenced here should contain sufficient detail to show compliance to the requirement.
List the documents that are being used to show compliance with 14 CFR part 21 (Part 1).
Modify the TSO number (Part 2) and the MPS number (Part 3) to identify the applicable TSO and MPS.
Part 1: 14 CFR Part 21 Method of Compliance (see Instructions for details)
14 CFR Part 21 Subpart O - Technical Standard Order Authorization Amdt A D T S O Documentation
21.603 Application. [21-92]
21.603(a) (a) An applicant for a TSO authorization must apply to the appropriate aircraft certification office in the form and manner prescribed by the FAA.
The applicant must include the following documents in the application:
[21-92]
21.603(a)
(1)
(1) A statement of conformance certifying that the applicant has met the requirements of this subpart and that the article concerned meets the applicable TSO that is effective on the date of application for that article.
[21-92] e f a b c d e
Appendix B B-5 Part 1: 14 CFR Part 21 Method of Compliance (see Instructions for details)
14 CFR Part 21 Subpart O - Technical Standard Order Authorization Amdt A D T S O Documentation
21.603(a)
(2)
(2) One copy of the technical data required in the applicable TSO.
[21-92]
21.603(a)
(2)(b)
(b) If the applicant anticipates a series of minor changes in accordance with § 21.619, the applicant may set forth in its application the basic model number of the article and the part number of the components with open brackets after it to denote that suffix change letters or numbers (or combinations of them) will be added from time to time.
[21-92]
21.603(a)
(2)(c)
(c) If the application is deficient, the applicant must, when requested by the FAA, provide any additional information necessary to show compliance with this part. If the applicant fails to provide the additional information within 30 days after the FAA's request, the FAA denies the application and notifies the applicant.
[21-92]
21.607 Quality system.
Each applicant for or holder of a TSO authorization must establish a quality system that meets the requirements of § 21.137.
[21-92]
Appendix B B-6 Part 1: 14 CFR Part 21 Method of Compliance (see Instructions for details)
14 CFR Part 21 Subpart O - Technical Standard Order Authorization Amdt A D T S O Documentation
21.608 Quality manual.
Each applicant for or holder of a TSO authorization must provide a manual describing its quality system to the FAA for approval. The manual must be in the English language and retrievable in a form acceptable to the FAA.
[21-92]
21.609 Location of or change to manufacturing facilities.
[21-92]
21.609 (a) An applicant may obtain a TSO authorization for manufacturing facilities located outside of the United States if the FAA finds no undue burden in administering the applicable requirements of Title 49 U.S.C. and this subchapter.
[21-92]
21.609 (b) The TSO authorization holder must obtain FAA approval before making any changes to the location of any of its manufacturing facilities.
[21-92]
21.609 (c) The TSO authorization holder must immediately notify the FAA, in writing, of any change to the manufacturing facilities that may affect the inspection, conformity, or airworthiness of its product or article.
[21-92]
Appendix B B-7 Part 1: 14 CFR Part 21 Method of Compliance (see Instructions for details)
14 CFR Part 21 Subpart O - Technical Standard Order Authorization Amdt A D T S O Documentation
21.610 Inspections and tests.
Each applicant for or holder of a TSO authorization must allow the FAA to inspect its quality system, facilities, technical data, and any manufactured articles and witness any tests, including any inspections or tests at a supplier facility, necessary to determine compliance with this subchapter.
[21-92]
21.616 Responsibility of holder.
Each holder of a TSO authorization must— [21-92]
21.616 (a) Amend the document required by § 21.605 as necessary to reflect changes in the organization and provide these amendments to the FAA.
[21-92]
21.616 (b) Maintain a quality system in compliance with the data and procedures approved for the TSO authorization;
[21-92]
21.616 (c) Ensure that each manufactured article conforms to its approved design, is in a condition for safe operation, and meets the applicable TSO;
[21-92]
21.616 (d) Mark the TSO article for which an approval has been issued. Marking must be in accordance with part 45 of this chapter, including any critical parts;
[21-92]
Appendix B B-8 Part 1: 14 CFR Part 21 Method of Compliance (see Instructions for details)
14 CFR Part 21 Subpart O - Technical Standard Order Authorization Amdt A D T S O Documentation
21.616 (e) Identify any portion of the TSO article (e.g., sub-assemblies, component parts, or replacement articles) that leave the manufacturer's facility as FAA approved with the manufacturer's part number and name, trademark, symbol, or other FAA approved manufacturer's identification;
[21-92]
21.616 (f) Have access to design data necessary to determine conformity and airworthiness for each article produced under the TSO authorization. The manufacturer must retain this data until it no longer manufactures the article. At that time, copies of the data must be sent to the FAA;
[21-92]
21.616 (g) Retain its TSO authorization and make it available to the FAA upon request; and [21-92]
21.616 (h) Make available to the FAA information regarding all delegation of authority to suppliers.
[21-92]
21.618 Approval for deviation. [21-92]
21.618 (a) Each manufacturer who requests approval to deviate from any performance standard of a TSO must show that factors or design features providing an equivalent level of safety compensate for the standards from which a deviation is requested.
[21-92]