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Specified Data Guidelines for Aircraft Modifications

Understand the concept of specified data and its importance in ensuring airworthiness for major modifications and repairs. Learn about the criteria, limitations, and conditions for using specified data according to TCCA regulations.

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Specified Data Guidelines for Aircraft Modifications

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  1. Specified Data Presented by: J. Diamant Boustead / B. Whitehead TCCA

  2. Specified Data – is: • Specified Data is a “source” description. Per AWM 571.06: “is information contained in authoritative documents which, although not approved by the Minister, has been specified by the Minister as appropriate for the purpose of major modifications and major repairs…” • In contrast, “approved data” is a “content” document , created and approved specifically for the modification or repair

  3. Specified Data – the intent • It was intended to specify “source” documents that contained information necessary to satisfy airworthiness design requirements for specific installations. • Data specified must be complete enough to assure that the requirements of the certification basis are met if the modification / repair is accomplished i.a.w. the specified data • No additional data should be required • No assessment of compliance should be required by the installer as the data is supposed to be complete.

  4. Specified Data – TCCA Approach • Use of specified data is being aligned with original intent • Use will be limited to: • List provided in current 571.06(1) definition. (list is exhaustive) • Material specified by the Minister in ACSIs / ACPLs addressing specific types of installations: • Existing example: ACPl 60 Encoding Altimeters • Currently In draft: General Avionics • GPS (ACPL 17 revision) • VHF, Nav/Com • CVRs

  5. Specified Data – Guidance Model Guidance Material “specified” by the Minister - OEM SBs - SRM • AC 43-13 with conditions Existing List in 571.06 i.e. ACPL 60 - GPS (based on ACPL 17) - CVR - Simple Avionics (I.e. VHF/VOR/NAV COM) - Other topic specific as developed and specified by TCCA OR

  6. Specified Data – New Guidance Material AC 571-xx Specified data / Generic Instructions: • Background / Intent • General conditions for use • Reporting requirements AC 571-xy Specified Data / Specific Mods (e.g. Avionics (Comm/Nav, CVR, GPS)) • Reference to above General AC • Specific criteria / conditions for use • Specific limitations

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