{"id":22364,"date":"2019-01-07T19:17:54","date_gmt":"2019-01-07T19:17:54","guid":{"rendered":"https:\/\/freeflysystems.com\/blog\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25"},"modified":"2023-02-08T05:02:36","modified_gmt":"2023-02-08T05:02:36","slug":"ad19-motor-drive-temperature-unreliable-2017-8-25","status":"publish","type":"kb_article","link":"https:\/\/freeflysystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25","title":{"rendered":"AD19 Motor Drive Temperature Unreliable (2017-8-25)"},"content":{"rendered":"<p><strong>INTRODUCTION<\/strong><\/p>\n<p>This Airworthiness Directive (AD) is being issued to alert all Alta users of a potential design flaw associated with the motor drive PCBA that results in an incorrect motor drive PCBA temperature reading.<\/p>\n<p><strong>BACKGROUND<\/strong><\/p>\n<p>In April 2016, Freefly revised the motor drive PCBA to update the design and remove some unused components. \u00a0An unintended consequence of this change was that some motor drive PCBAs used on Alta\u2019s sold after 8-1-2016 \u00a0now give incorrect temperature readings.<\/p>\n<p><strong>DISCUSSION<\/strong><\/p>\n<p>Further investigation by the engineering team led to a better understanding of the temperature sensor and the issues with the design. \u00a0This investigation has led the team to deem the temperature reading on the Alta motor drive PCBAs shipped after August 1, 2016 to be unreliable.<\/p>\n<p><strong>REQUIRED ACTION<\/strong><\/p>\n<p>Freefly recommends that users do not reference the motor temperature reading when making decisions regarding machine performance, payload capabilities, or flight worthiness. \u00a0Freefly recommends that users reference the weight check functionality within the \u2018monitor\u2019 section of the App to ascertain acceptable payload for various altitudes and temperatures. \u00a0Additionally, Freefly publishes an allowable gross weight chart in the Alta user manuals to help users understand max allowable gross weight.<\/p>\n","protected":false},"template":"","class_list":["post-22364","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>AD19 Motor Drive Temperature Unreliable (2017-8-25) - 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\/ad19-motor-drive-temperature-unreliable-2017-8-25\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AD19 Motor Drive Temperature Unreliable (2017-8-25)\" \/>\n<meta property=\"og:description\" content=\"INTRODUCTION This Airworthiness Directive (AD) is being issued to alert all Alta users of a potential design flaw associated with the motor drive PCBA that results in an incorrect motor drive PCBA temperature reading. BACKGROUND In April 2016, Freefly revised the motor drive PCBA to update the design and remove some unused components. \u00a0An unintended [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25\" \/>\n<meta property=\"og:site_name\" content=\"Freefly Systems\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-08T05:02:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/freeflysystems.com\/wp-content\/uploads\/2023\/02\/freefly-og-logo.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25\",\"url\":\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25\",\"name\":\"AD19 Motor Drive Temperature Unreliable (2017-8-25) - Freefly Systems\",\"isPartOf\":{\"@id\":\"https:\/\/freeflysystems.com\/#website\"},\"datePublished\":\"2019-01-07T19:17:54+00:00\",\"dateModified\":\"2023-02-08T05:02:36+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/freeflysystems.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"AD19 Motor Drive Temperature Unreliable (2017-8-25)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/freeflysystems.com\/#website\",\"url\":\"https:\/\/freeflysystems.com\/\",\"name\":\"Freefly Systems\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/freeflysystems.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"AD19 Motor Drive Temperature Unreliable (2017-8-25) - Freefly Systems","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/FreeflySystems.com\/knowledge-base\/ad19-motor-drive-temperature-unreliable-2017-8-25","og_locale":"en_US","og_type":"article","og_title":"AD19 Motor Drive Temperature Unreliable (2017-8-25)","og_description":"INTRODUCTION This Airworthiness Directive (AD) is being issued to alert all Alta users of a potential design flaw associated with the motor drive PCBA that results in an incorrect motor drive PCBA temperature reading. 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