Proposed Revision to Advisory Circular 21-19A, Installation of Used Engines in New Production Aircraft

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This notice announces the availability of proposed Advisory Circular (AC) 21-19A, Installation of Used Engines in New Production Aircraft, for review and comments. The proposed AC 21-19A provides information and guidance concerning an acceptable means, but not the only means, of demonstration compliance with the requirements Title 14, Code of Federal Regulations part 21, Certification Procedures for Products and Parts.