DI-NDTI-81896B

Engine Control System Component Similarity/Analysis Report

The Engine Control System Component Similarity/Analysis Report describes the format and content of the data product used for engine control system component similarity arguments resulting from applicable tasks delineated in the solicitation.

Approval DateJune 4, 2026

AMSC Number10672

Preparing ActivityAV

Project NumberNDTI-2026-002

OPR—

DTIC ApplicableNo

GIDEP ApplicableNo

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatfree_text

963C CompliantYes

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-NDTI-81896A

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Description & Purpose

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Application & Interrelationship

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Use & Relationship

a. This Data Item Description (DID) contains the format, content, and intended use information for the data deliverable resulting from the work task described in 5.10.4.2 and 5.10.4.3 of MIL-STD-3087.

b. This DID supersedes DI-NDTI-81896A.

Preparation Instructions

1Reference Documents.The applicable issue of the documents cited herein, if any, including their approval dates and dates of any applicable amendments, notices, and revisions, shall be as specified in the contract.

2Cover.

2.1Title, number, and date.

2.2Contractor's name.

2.3Contract number.

3Title Page.

3.1Title, number and date.

3.2Contractor's name.

3.3Name(s) of the author(s).

3.4Contract number.

4Abstract.

4.1Objective of the similarity/analysis report.

4.2Brief statement of the contents of the report.

5Table of Contents.

6List of Tables.When used in a separate series, tables shall be given Roman numerals.

7List of Illustrations.

7.1Figure numbers and captions of all illustrations.

7.2Photographs, charts, and graphs shall be treated as illustrations and given figure numbers.

8Applicable Documents.

9The part number of the component for which qualification by similarity or analysis is being requested.

10The part number(s) of the 'similar' component which forms the base for the argument.

11A brief physical and functional description of the component including, as applicable:

11.1Photos or 2-D and isometric drawings.

11.2Functional diagrams.

11.3Schematics.

11.4Cross sections.

12Description of the functional/physical differences between the base component and the new component.All differences shall be illustrated with the following, as applicable, presented side-by-side, top and bottom, or one following the other. Differences shall be clearly identified.

12.1Photos or 2-D and isometric drawings.

12.2Functional diagrams.

12.3Schematics.

12.4Cross sections.

13Description of the required tests to be performed, referencing any applicable paragraphs in the model specification or other requirements documents.

14Status of the base component.

14.1State if the component is qualified/certified, and if so, the granting agency.

14.2Describe if the component has been previously tested, and if so, what type of testing it has undergone.

14.3If the component is in service use:

14.3.1Describe and compare the service environments, and the ability of the required testing to discriminate between the environments.

14.3.2Approximate number of accumulated component flight hours.

14.3.3Number and type of failures.

14.3.4Predicted vs. actual Mean Time Between Failure (MTBF).

15Basis for requesting waiver for each of the Airworthiness Qualification Plan (AQP)/Airworthiness Qualification Specification (AQS) specified tests.

15.1Identical component (same part number (P/N)) as a qualified/certified and in-service component.

15.2Modified component similar to a qualified/certified and in-service component.

15.3Identical component (same P/N) as a qualified/certified and tested component.

15.4Modified component similar to a qualified/certified and tested component.

16Supporting documentation requirements.

16.1If the basis of waiver is 15a, no further information is required beyond items 2 through 15a.

16.2If the basis of waiver is 15b, then in addition to items 2 through 15b, an argument or analysis must be provided as to why each of the functional/physical differences does not require performing the specified test.

16.3If the basis of waiver is 15c or 15d, then in addition to items 2 through 15c or 15d, a complete description of the actual testing performed on the base component is required as follows:

16.3.1Date and location of test.

16.3.2Description of the test and the procedure utilized and any deviations from the procedure or the applied test spectrum.

16.3.3Unit operational status during the test (non-operating or operating).If operating, identify the component functional parameters which were being monitored and any differences between the pass/fail criteria and those for the proposed current application.

16.3.4Provide any significant findings, if any, and the subsequent disposition of same.

16.3.5The final results of all Acceptance Test Procedures (ATPs) conducted during the test sequence.If any non-conformance or failures were noted, provide the subsequent disposition of same.

16.3.6Discussion of the required test versus the actual test performed with respect to test adequacy/equivalency.

16.3.7Test reports.These shall be provided as appendices with clear, easy to follow references to specific portions of those test reports in the main body to assist the reviewer in determining the outcome of the original testing as summarized in items (1) through (6) above.

16.4If the basis of waiver is 15d, in addition to the information provided under 16c, then an argument or analysis must be provided as to why each of the functional/physical differences does not require performing the specified test.

17Concluding remarks requesting waiver of the specified test and upon which basis (15) the request is being made.

References

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