{"id":54687,"date":"2025-07-13T12:38:42","date_gmt":"2025-07-13T07:08:42","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=54687"},"modified":"2025-07-14T14:59:12","modified_gmt":"2025-07-14T09:29:12","slug":"air-india-crash-why-fuel-control-switches-are-under-investigation","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/air-india-crash-why-fuel-control-switches-are-under-investigation\/","title":{"rendered":"Air India Crash: Why Fuel Control Switches Are Under Investigation"},"content":{"rendered":"<h2><b>Air India Crash Fuel Control Switches Latest News<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The June 12 crash of Air India flight AI 171, a Boeing 787-8 from Ahmedabad to London, killed 260 people.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Aircraft Accident Investigation Bureau\u2019s (AAIB) preliminary report highlights that both engine fuel control switches moved from \u2018RUN\u2019 to \u2018CUTOFF\u2019 just after take-off, possibly causing the disaster.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cockpit recordings reveal one pilot questioning the other about cutting off fuel, which was denied.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Both pilots had sufficient flying experience. Investigators are now analyzing flight and voice recorder data to determine how and why the switches were turned off.<\/span><\/li>\n<\/ul>\n<h2><b>Fuel Control Switches: Critical Engine Safeguards<\/b><\/h2>\n<figure id=\"attachment_54717\" aria-describedby=\"caption-attachment-54717\" style=\"width: 906px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"size-full wp-image-54717\" src=\"https:\/\/d35xcwcl37xo08.cloudfront.net\/current-affairs-wp-uploads\/2025\/07\/Fuel-Control-Switches.jpg\" alt=\"Fuel Control Switches\" width=\"916\" height=\"747\" srcset=\"https:\/\/d35xcwcl37xo08.cloudfront.net\/current-affairs-wp-uploads\/2025\/07\/Fuel-Control-Switches.jpg 916w, https:\/\/d35xcwcl37xo08.cloudfront.net\/current-affairs-wp-uploads\/2025\/07\/Fuel-Control-Switches-768x626.jpg 768w\" sizes=\"(max-width: 916px) 100vw, 916px\" \/><figcaption id=\"caption-attachment-54717\" class=\"wp-caption-text\">Fuel Control Switches<\/figcaption><\/figure>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fuel control switches regulate engine fuel flow and require deliberate manual action to move between \u2018RUN\u2019 and \u2018CUTOFF\u2019.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Located below the thrust levers on Boeing 787s, these spring-loaded switches require deliberate lifting and shifting between two modes: &#8216;RUN&#8217; and &#8216;CUTOFF&#8217;.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Protected by brackets and a stop-lock mechanism, they\u2019re typically operated only on the ground\u2014during engine start-up or shutdown.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In-flight use occurs only during engine failure or serious damage. Accidental activation is considered nearly impossible.<\/span><\/li>\n<\/ul>\n<h3><b>Fuel Control Switches: Function, Safety, and Crash Relevance<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fuel control switches have two positions:<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><b>RUN:<\/b><span style=\"font-weight: 400;\"> Feeds fuel to the engine for normal operation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><b>CUTOFF:<\/b><span style=\"font-weight: 400;\"> Cuts off fuel, shutting the engine down.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Changing positions requires deliberate crew action via a safety mechanism.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Experts stress these switches are not meant to be moved in-flight except during emergencies.<\/span><\/li>\n<\/ul>\n<h2><b>Why and How Pilots Use Fuel Switches Mid-Flight<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pilots move a fuel control switch mid-flight only if an engine fails or is severely damaged. This shuts off fuel to that engine, cutting thrust instantly.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Normally, only one switch is moved, as modern aircraft can fly with one engine. Shutting down both engines is highly unusual and dangerous.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Experts stress this is a deliberate, checklist-driven process involving both pilots.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In AI 171\u2019s crash, both switches moved to &#8216;CUTOFF&#8217; shortly after takeoff, starving both engines of fuel.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Investigators are examining if this was due to human error, mechanical fault, or system failure. The switches are protected against accidental movement with electronic gates and physical brackets.<\/span><\/li>\n<\/ul>\n<h3><b>Experts Question Possibility of Accidental Fuel Switch-Off<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Aviation experts emphasize it\u2019s nearly impossible for pilots to unintentionally shut off both fuel switches mid-flight, especially during climb.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">While the final cause is still under investigation, the preliminary findings raise concerns over cockpit procedures, safety checks, and potential technical faults.<\/span><\/li>\n<\/ul>\n<h2><b>Honeywell Switches Under Scrutiny, Previously Flagged by FAA<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The fuel control switches (part number 4TL837-3D) are made by Honeywell.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A 2018 US FAA advisory noted <\/span><span style=\"font-weight: 400;\">possible locking mechanism faults<\/span><span style=\"font-weight: 400;\">, but inspections were not mandatory. Air India did not carry out these checks.<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">The 2018 advisory flagged potential disengagement of the fuel control switch locking feature on some Boeing aircraft.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">According to the FAA, disengaged locking could let switches move unintentionally, potentially causing in-flight engine shutdown.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The AI-171 cockpit recording suggests neither pilot knowingly moved the switches.<\/span><\/li>\n<\/ul>\n<p>\n<b>Source:<\/b> <a href=\"https:\/\/indianexpress.com\/article\/business\/aviation\/what-are-cutoff-fuel-switches-air-india-ahmedabad-flight-crash-probe-10121619\/\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">IE |<\/span><\/a><span style=\"font-weight: 400;\">\u00a0<\/span><a href=\"https:\/\/timesofindia.indiatimes.com\/business\/india-business\/air-india-plane-crash-what-are-the-fuel-switches-under-scrutiny-what-they-do-and-why-they-matter\/articleshowprint\/122401584.cms\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">ToI |<\/span><\/a><span style=\"font-weight: 400;\">\u00a0<\/span><a href=\"https:\/\/www.business-standard.com\/industry\/aviation\/explainer-what-are-the-fuel-switches-at-the-centre-of-ai-171-crash-probe-125071200068_1.html\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">BS<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Air India AI 171 crash linked to sudden fuel switch-off. Experts probe Boeing 787 fuel control switches&#8217; role in tragic disaster.<\/p>\n","protected":false},"author":18,"featured_media":54802,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[1507,60,22,59],"class_list":{"0":"post-54687","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-mains-current-affairs","8":"tag-air-india-crash-fuel-control-switches","9":"tag-mains-articles","10":"tag-upsc-current-affairs","11":"tag-upsc-mains-current-affairs","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/54687","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=54687"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/54687\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/54802"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=54687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=54687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=54687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}