num_pages: 96
description: This official aviation publication presents suggestions and safety-related recommendations to assist amateur and ultralight builders in developing individualized aircraft flight test plans.
language: English
title: Amateur-Built Aircraft and Ultralight Flight Testing Handbook/Ac No: 90-89A
titlecomplete: Amateur-Built Aircraft and Ultralight Flight Testing Handbook/Ac No: 90-89A (Advisory Circular)
ratings_count: 1
publisher: United States Government Printing