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21.101-1A - Establishing the Certification Basis of Changed Aeronautical Products

Date Issued
September 03, 2010
Responsible Office

The Federal Aviation Administration (FAA) wrote this advisory circular (AC) to provide guidance for establishing the certification basis for changed aeronautical products in accordance with Title 14 of the Code of Federal Regulations (14 CFR) § 21.101 and to help identify if it will be necessary to apply for a new type certificate (TC) under 14 CFR § 21.19.  The guidance describes the process for establishing the certification basis for amended TCs, supplemental type certificates (STC) and amended STCs, detailing evaluations, classifications, and decisions made throughout the process.