{"id":423,"date":"2025-10-22T12:48:15","date_gmt":"2025-10-22T09:18:15","guid":{"rendered":"https:\/\/spairservice.com\/repairs-of-aircraft-parts\/"},"modified":"2026-05-21T10:15:18","modified_gmt":"2026-05-21T06:45:18","slug":"repairs-of-aircraft-parts","status":"publish","type":"page","link":"https:\/\/spairservice.com\/en\/repairs-of-aircraft-parts\/","title":{"rendered":"APU Shop"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"423\" class=\"elementor elementor-423\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-975ce49 e-con-full e-flex e-con e-parent\" data-id=\"975ce49\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-4975f43 e-con-full e-flex e-con e-child\" data-id=\"4975f43\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div 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https:\/\/spairservice.com\/wp-content\/uploads\/2025\/10\/Spadana-Logo-1536x520.png 1536w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/>\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af8099f elementor-nav-menu--stretch elementor-nav-menu__align-start elementor-hidden-mobile elementor-nav-menu--dropdown-tablet elementor-nav-menu__text-align-aside elementor-nav-menu--toggle elementor-nav-menu--burger elementor-widget elementor-widget-nav-menu\" data-id=\"af8099f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;full_width&quot;:&quot;stretch&quot;,&quot;layout&quot;:&quot;horizontal&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;svg aria-hidden=\\&quot;true\\&quot; class=\\&quot;e-font-icon-svg e-fas-caret-down\\&quot; viewBox=\\&quot;0 0 320 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M31.3 192h257.3c17.8 0 26.7 21.5 14.1 34.1L174.1 354.8c-7.8 7.8-20.5 7.8-28.3 0L17.2 226.1C4.6 213.5 13.5 192 31.3 192z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;toggle&quot;:&quot;burger&quot;}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Menu\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-horizontal e--pointer-none\">\n\t\t\t\t<ul id=\"menu-1-af8099f\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-443\"><a href=\"https:\/\/spairservice.com\/en\/\" class=\"elementor-item\">Home<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-444\"><a href=\"#\" class=\"elementor-item elementor-item-anchor\">Services<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-445\"><a href=\"https:\/\/spairservice.com\/en\/manufacturing-of-aircraft-parts\/\" class=\"elementor-sub-item\">Manufacturing of aircraft parts<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-617\"><a href=\"#\" class=\"elementor-sub-item elementor-item-anchor\">Repairing of aircraft parts<\/a>\n\t<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-637\"><a href=\"https:\/\/spairservice.com\/en\/repairs-of-aircraft-parts\/\" class=\"elementor-sub-item\">APU Shop<\/a><\/li>\n\t\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-618\"><a href=\"https:\/\/spairservice.com\/en\/avionic-shop\/\" class=\"elementor-sub-item\">Avionic Shop<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-447\"><a href=\"https:\/\/spairservice.com\/en\/logistics\/\" 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class=\"elementor-item\" tabindex=\"-1\">Home<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-444\"><a href=\"#\" class=\"elementor-item elementor-item-anchor\" tabindex=\"-1\">Services<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-445\"><a href=\"https:\/\/spairservice.com\/en\/manufacturing-of-aircraft-parts\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Manufacturing of aircraft parts<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-617\"><a href=\"#\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">Repairing of aircraft parts<\/a>\n\t<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-637\"><a href=\"https:\/\/spairservice.com\/en\/repairs-of-aircraft-parts\/\" class=\"elementor-sub-item\" tabindex=\"-1\">APU Shop<\/a><\/li>\n\t\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-618\"><a href=\"https:\/\/spairservice.com\/en\/avionic-shop\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Avionic Shop<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-447\"><a href=\"https:\/\/spairservice.com\/en\/logistics\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Logistics<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-449\"><a href=\"https:\/\/spairservice.com\/en\/about-us\/\" class=\"elementor-item\" tabindex=\"-1\">About us<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-450\"><a href=\"https:\/\/spairservice.com\/en\/contact\/\" class=\"elementor-item\" tabindex=\"-1\">Contact<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b15e11 elementor-mobile-align-right elementor-hidden-mobile elementor-widget elementor-widget-button\" data-id=\"3b15e11\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/cp91.hostmihan.com:2096\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Member Login<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fa0740d elementor-hidden-desktop elementor-hidden-tablet elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"fa0740d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<a class=\"elementor-icon\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjkyIiwidG9nZ2xlIjpmYWxzZX0%3D\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-bars\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M16 132h416c8.837 0 16-7.163 16-16V76c0-8.837-7.163-16-16-16H16C7.163 60 0 67.163 0 76v40c0 8.837 7.163 16 16 16zm0 160h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16zm0 160h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16z\"><\/path><\/svg>\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-779bd56 e-con-full e-flex e-con e-child\" data-id=\"779bd56\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-2eedd74 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"2eedd74\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1409229 elementor-widget elementor-widget-heading\" data-id=\"1409229\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Aircraft Auxiliary Power Unit (APU)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39c36e0 info-box-content elementor-widget elementor-widget-text-editor\" data-id=\"39c36e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The <strong>Auxiliary Power Unit (APU)<\/strong> is a <strong>small gas turbine engine<\/strong>, typically located in the <strong>tail section of an aircraft<\/strong>, designed to supply <strong>electrical and pneumatic power<\/strong> to various aircraft systems when the main engines are not running.<\/p><p><strong>Functions and Operation:<\/strong><\/p><ol><li><strong>Electrical Power Supply:<\/strong><br \/>The APU drives an <strong>AC generator<\/strong> that provides three-phase electrical power for essential aircraft systems such as <strong>avionics, flight controls, lighting, and environmental control systems (ECS)<\/strong>.<\/li><li><strong>Pneumatic Power (Bleed Air):<\/strong><br \/>The compressor section of the APU delivers <strong>compressed air<\/strong> through the pneumatic system, which is used for:<ul><li><strong>Starting the main engines<\/strong><\/li><li><strong>Running the air conditioning and pressurization systems<\/strong><\/li><\/ul><\/li><li><strong>Emergency Backup:<\/strong><br \/>In case of failure of the main electrical or pneumatic systems during flight, the APU can serve as an <strong>independent emergency power source<\/strong>, ensuring continued operation of critical systems.<\/li><\/ol><p><strong>Main Components:<\/strong><\/p><ul><li><strong>Gas Turbine Core:<\/strong> Includes compressor, combustion chamber, and turbine<\/li><li><strong>Electrical Generator:<\/strong> Produces AC power for onboard systems<\/li><li><strong>Gearbox and Accessories:<\/strong> Transmits mechanical power to the generator and pumps<\/li><li><strong>Electronic Control Unit (EECU or ECU):<\/strong> Automatically controls start-up, fuel flow, and overall APU operation<\/li><li><strong>Fuel and Lubrication Systems:<\/strong> Supply and maintain the APU\u2019s power and cooling needs<\/li><\/ul><p><strong>Importance and Maintenance:<\/strong><\/p><p>Because the APU plays a vital role in <strong>pre-flight preparation and main engine start-up<\/strong>, any malfunction\u2014especially in its <strong>pneumatic or electrical subsystems<\/strong>\u2014can lead to flight delays or cancellations.<br \/>Therefore, APUs are routinely monitored using <strong>Health Monitoring Systems (HMS)<\/strong> and <strong>Predictive Maintenance<\/strong> programs to ensure reliability and safety.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d85e0e e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"5d85e0e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-43fe884 elementor--h-position-center elementor--v-position-middle elementor-widget elementor-widget-slides\" data-id=\"43fe884\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;navigation&quot;:&quot;none&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;transition&quot;:&quot;slide&quot;,&quot;transition_speed&quot;:500}\" data-widget_type=\"slides.default\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-slides-wrapper elementor-main-swiper swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"\u0627\u0633\u0644\u0627\u06cc\u062f \u0647\u0627\" dir=\"ltr\" data-animation=\"fadeInUp\">\n\t\t\t\t<div class=\"swiper-wrapper elementor-slides\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-repeater-item-a47d55e swiper-slide\" role=\"group\" aria-roledescription=\"slide\"><div class=\"swiper-slide-bg\" role=\"img\" aria-label=\"image 3\"><\/div><div class=\"swiper-slide-inner\" ><div class=\"swiper-slide-contents\"><\/div><\/div><\/div><div class=\"elementor-repeater-item-e9cd298 swiper-slide\" role=\"group\" aria-roledescription=\"slide\"><div class=\"swiper-slide-bg\" role=\"img\" aria-label=\"image 5\"><\/div><div class=\"swiper-slide-inner\" ><div class=\"swiper-slide-contents\"><\/div><\/div><\/div><div class=\"elementor-repeater-item-eb6c5dd swiper-slide\" role=\"group\" aria-roledescription=\"slide\"><div class=\"swiper-slide-bg\" role=\"img\" aria-label=\"image 6\"><\/div><div class=\"swiper-slide-inner\" ><div class=\"swiper-slide-contents\"><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0ac4582 e-con-full e-flex e-con e-child\" data-id=\"0ac4582\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-199851b elementor-widget elementor-widget-text-editor\" data-id=\"199851b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Address: Unit 404, 4th floor, Ario Building, Nafisi St., Ekbatan, Tehran<\/p><p>Email: info@spairservice.com<\/p><p>Contact number: 021-44698100<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Member Login Aircraft Auxiliary Power Unit (APU) The Auxiliary Power Unit (APU) is a small gas turbine engine, typically located in the tail section of an aircraft, designed to supply electrical and pneumatic power to various aircraft systems when the main engines are not running. Functions and Operation: Electrical Power Supply:The APU drives an AC [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":{"footnotes":""},"class_list":["post-423","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/pages\/423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/comments?post=423"}],"version-history":[{"count":16,"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/pages\/423\/revisions"}],"predecessor-version":[{"id":665,"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/pages\/423\/revisions\/665"}],"wp:attachment":[{"href":"https:\/\/spairservice.com\/en\/wp-json\/wp\/v2\/media?parent=423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}