{"id":22400,"date":"2019-01-07T19:18:10","date_gmt":"2019-01-07T19:18:10","guid":{"rendered":"https:\/\/freeflysystems.com\/blog\/knowledge-base\/ad17-motion-booting-in-firmware-4-0-4-and-previous-2017-1-25"},"modified":"2023-02-08T05:01:34","modified_gmt":"2023-02-08T05:01:34","slug":"ad17-motion-booting-in-firmware-4-0-4-and-previous-2017-1-25","status":"publish","type":"kb_article","link":"https:\/\/freeflysystems.com\/knowledge-base\/ad17-motion-booting-in-firmware-4-0-4-and-previous-2017-1-25","title":{"rendered":"AD17 Motion Booting in Firmware 4.0.4 and previous (2017-1-25)"},"content":{"rendered":"<p><strong>INTRODUCTION<\/strong><\/p>\n<p>This Airworthiness Directive (AD) is being issued to alert all Alta users of a bug associated with the Motion Booting function that could prevent the machine from booting and operating successfully. Use of the Motion Booting function is not recommended for firmware versions 4.0.4 and previous. No other functions are known to be impacted by this bug.<\/p>\n<p>This AD is being issued to all Alta 6 and Alta 8 owners.<\/p>\n<p><strong>BACKGROUND<\/strong><\/p>\n<p>Alta flight control firmware includes an optional function to allow the machine to be booted on a moving platform such as on a boat. This boot process is \u201coff\u201d by default in the Alta App and must be selectively turned \u201con\u201d to be used.<\/p>\n<p><strong>DISCUSSION<\/strong><\/p>\n<p>A bug was discovered that affects the stored gyroscope data on the Synapse flight controller. During the Motion Booting startup sequence, the Alta could pull old or incorrect gyroscope data or may revert to estimated values rather than the stored values. As a result, the machine may exhibit out of control behavior if booted with Motion Booting on.<\/p>\n<p>The standard booting process is not affected by this bug.<\/p>\n<p><strong>RECOMMENDATION<\/strong><\/p>\n<p>Do not use the Motion Booting function available in the Alta App v1.6 (Synapse firmware version 4.0.4) until a new firmware version has been released for public use.<\/p>\n","protected":false},"template":"","class_list":["post-22400","kb_article","type-kb_article","status-publish","hentry","support_category-alta","support_category-alta-service-bulletins"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AD17 Motion Booting in Firmware 4.0.4 and previous (2017-1-25) - Freefly Systems<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/FreeflySystems.com\/knowledge-base\/ad17-motion-booting-in-firmware-4-0-4-and-previous-2017-1-25\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AD17 Motion Booting in Firmware 4.0.4 and previous (2017-1-25)\" \/>\n<meta property=\"og:description\" content=\"INTRODUCTION This Airworthiness Directive (AD) is being issued to alert all Alta users of a bug associated with the Motion Booting function that could prevent the machine from booting and operating successfully. 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