{"id":32436706,"date":"2026-11-12T10:34:32","date_gmt":"2026-11-12T09:34:32","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/instructions-for-continued-airworthiness-ica-airworthiness-limitations-section\/"},"modified":"2026-11-12T10:34:52","modified_gmt":"2026-11-12T09:34:52","slug":"instructions-for-continued-airworthiness-ica-airworthiness-limitations-section","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/de\/instructions-for-continued-airworthiness-ica-airworthiness-limitations-section\/","title":{"rendered":"Instructions for Continued Airworthiness: Which Part Is Mandatory"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n<!-- mfsh:top -->\n\n<style>\n.mfsh-trigger{display:inline-flex;align-items:center;gap:10px;height:44px;padding:0 18px;margin:0 0 26px;border:2px solid 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Thousands of pages of servicing data, troubleshooting trees, torque values and inspection schedules. Most owners assume the whole stack is law.<\/p>\n\n<p>It is not. In 2011 the FAA&rsquo;s own Office of the Chief Counsel said in writing that, for small aircraft flown under Part 91, the intervals and replacement times in a manufacturer&rsquo;s manuals are, as a general proposition, not mandatory. The exceptions are Airworthiness Directives and one clearly marked section of the manual that the FAA itself has approved. It is called the Airworthiness Limitations Section, and it is the part of the maintenance manual that carries the force of a regulation.<\/p>\n\n<p>Here is who writes the instructions, what goes into them, and why the difference between &ldquo;approved&rdquo; and &ldquo;accepted&rdquo; decides what an owner must do.<\/p>\n\n\n<div style=\"background:#f4f6f9;border:1px solid #e2e7ee;padding:18px 22px;margin:22px 0 26px\"><p style=\"margin:0 0 8px;font-weight:700;color:#0d1117\">Quick Facts<\/p><ul style=\"margin:0;padding-left:18px\"><li style=\"margin:4px 0\"><strong>What it is:<\/strong> Instructions for Continued Airworthiness (ICA): the manufacturer&rsquo;s maintenance data for an aircraft, engine or propeller<\/li><li style=\"margin:4px 0\"><strong>Who writes it:<\/strong> The design approval holder: type certificate or STC holder (14 CFR 21.50(b))<\/li><li style=\"margin:4px 0\"><strong>When required:<\/strong> Design approvals applied for after 28 January 1981; furnished on delivery or first standard airworthiness certificate, whichever is later<\/li><li style=\"margin:4px 0\"><strong>Transport aeroplanes:<\/strong> 14 CFR 25.1529 and Part 25 Appendix H; ICA must be acceptable to the FAA<\/li><li style=\"margin:4px 0\"><strong>The binding part:<\/strong> Airworthiness Limitations Section (ALS), FAA-approved and part of the type design (21.31(c))<\/li><li style=\"margin:4px 0\"><strong>Enforced by:<\/strong> 14 CFR 43.16 and 91.403(c), unless an approved alternative programme applies<\/li><li style=\"margin:4px 0\"><strong>Rest of the ICA:<\/strong> Accepted, not approved; intervals generally not mandatory for Part 91 (FAA Chief Counsel, 2011), but 43.13 still applies<\/li><\/ul><\/div>\n\n\n<h2 style=\"padding-top:22px\">The manufacturer writes it, the FAA reviews it<\/h2>\n\n<p>The legal starting point is 14 CFR 21.50(b). The holder of a design approval, either a type certificate or a supplemental type certificate, for an aircraft, engine or propeller applied for after 28 January 1981, must furnish at least one set of complete Instructions for Continued Airworthiness to the owner on delivery, or when the first standard airworthiness certificate is issued, whichever is later. After that, the instructions and every change to them must be made available to anyone required to comply with them.<\/p>\n\n<p>So the regulator does not write the maintenance manual. Boeing, Cessna, Pratt &amp; Whitney or the small company that holds an STC for a cabin modification writes it. The rule only says what it must contain, through a set of airworthiness standards: 23.1529 for small aeroplanes, 25.1529 for transport aeroplanes, 27.1529 and 29.1529 for rotorcraft, 33.4 for engines and 35.4 for propellers. FAA Order 8110.54A, the agency&rsquo;s guidance on ICA, records that these requirements arrived in 1980 and replaced the patchwork of manual standards that came before.<\/p>\n\n<p>Section 25.1529 sets the standard for transport aircraft in two sentences. The applicant must prepare the instructions in accordance with Appendix H to Part 25, and they must be &ldquo;acceptable to the Administrator.&rdquo; They may even be incomplete at type certification, provided there is a programme to finish them before the first aeroplane is delivered or receives its standard certificate of airworthiness.<\/p>\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/11\/fl-technics-maintenance-hangar-vilnius.jpg\" alt=\"An airliner surrounded by work stands, lifts and removed panels inside the FL Technics maintenance hangar at Vilnius International Airport\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">An airliner in heavy maintenance in the FL Technics hangar at Vilnius in 2011. Every task card in a check like this traces back to the manufacturer&rsquo;s Instructions for Continued Airworthiness. Photo: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Inside_of_FL_Technics_hangar_in_International_Vilnius_Airport.jpg\" target=\"_blank\" rel=\"noopener\">Tadas1980 \/ Wikimedia Commons, CC BY-SA 3.0<\/a><\/figcaption><\/figure>\n\n\n<h2 style=\"padding-top:22px\">What Appendix H puts in the box<\/h2>\n\n<p>Appendix H reads like the contents page of every airliner maintenance manual ever printed, because it is the template for them. It requires the manuals to be in English. They must describe the aeroplane and its systems, give servicing information on tank capacities, fluids, pressures, lubrication points and jacking, and provide scheduling information with recommended periods for cleaning, inspecting, adjusting, testing and lubricating each part.<\/p>\n\n<p>It goes on: troubleshooting information, removal and replacement procedures, diagrams of access panels, details of special inspection techniques such as radiographic and ultrasonic testing, protective treatments after inspection, structural fastener data including torque values, and a list of special tools. The aeroplane&rsquo;s instructions must also include those for each engine and propeller, or the essential information if the engine or propeller maker does not supply them.<\/p>\n\n<p>FAA guidance is firm that the result must be specific to the product. Order 8110.54A warns that applicants lean too heavily on general standard-practice documents such as AC 43.13-1, which it describes as acceptable only when there are no manufacturer repair or maintenance instructions, and not acceptable as the &ldquo;complete set&rdquo; of ICA.<\/p>\n\n\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0 8px\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/qErJpKi6atw\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\n\n<p style=\"font-size:13px;color:#777;text-align:center;font-style:italic;margin:0 0 24px\">EASA&rsquo;s own explainer on Instructions for Continued Airworthiness, the European counterpart of the same concept.<\/p>\n\n<h2 style=\"padding-top:22px\">The section that binds<\/h2>\n\n<p>Then comes paragraph H25.4, and the tone changes. The instructions must contain a section titled Airworthiness Limitations, &ldquo;segregated and clearly distinguishable from the rest of the document.&rdquo; For a transport aeroplane it must list each mandatory modification time, replacement time, structural inspection interval and procedure approved under the fatigue and damage-tolerance rule, 25.571; the fuel tank system limitations, including critical design configuration control limitations, under 25.981; mandatory replacement times for wiring components; lightning protection limitations; and the certification maintenance requirements.<\/p>\n\n<p>It must also state a limit of validity, the number of flight cycles or hours up to which the engineering data behind the structural maintenance programme holds good. Until full-scale fatigue testing is complete and the FAA has approved that figure, an aeroplane may not accumulate more than half the cycles reached by the fatigue test article. That is the mechanism behind the long fatigue-test campaigns described in our <a href=\"https:\/\/migflug.com\/afterburner\/full-scale-fatigue-test-boeing-777-9-limit-of-validity-wfd\/\">Boeing 777-9 fatigue test<\/a> feature. For engines, the approved lives of discs and other <a href=\"https:\/\/migflug.com\/afterburner\/life-limited-parts-llp-turbine-disc-cycles-mutilation-explained\/\">life-limited parts<\/a> sit in the same kind of section.<\/p>\n\n<p>And the section has to say what it is. Appendix H requires a legible statement in a prominent place, word for word.<\/p>\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #1565c0;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7\"><div><em>&ldquo;The Airworthiness Limitations section is FAA-approved and specifies maintenance required under &sect;&sect; 43.16 and 91.403 of the Federal Aviation Regulations, unless an alternative program has been FAA approved.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>14 CFR Part 25, Appendix H<\/strong> &mdash; H25.4(b), the statement every transport aeroplane ALS must carry<\/div><\/div><\/div>\n\n\n<p>Three regulations make that sentence true. Section 21.31(c) lists the Airworthiness Limitations Section as part of the type design itself, alongside the drawings and the structural data. Section 43.16 requires anyone performing a task it specifies to do it in accordance with that section, unless an approved Part 121 or 135 operations specification or an approved inspection programme under 91.409(e) provides otherwise. And 91.403(c) says no person may operate the aircraft unless its mandatory replacement times, inspection intervals and related procedures, or those approved alternatives, have been complied with.<\/p>\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/11\/boeing-737-200-fuselage-tail-dock-buffalo-haer.jpg\" alt=\"Black and white view along the top of a Boeing 737-200 fuselage from the tail dock of a maintenance hangar at Buffalo, with walkways on both sides\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">A Boeing 737-200 seen from the top level of the tail dock in a maintenance hangar at Buffalo, New York. The original record notes a safety cable that lets inspectors walk the fuselage to check for cracks, the kind of structural inspection an Airworthiness Limitations Section can make mandatory. Photo: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:VIEW_OF_BOEING_737-200_FUSELAGE_FROM_TOP_LEVEL_OF_TAIL_DOCK_AND._A_NEW_SAFETY_CABLE_FROM_THE_TAIL_DOCK_WILL_ALLOW_INSPECTORS_TO_WALK_UP_AND_DOWN_THE_FUSELAGE_TO_CHECK_FOR_CRACKS_HAER_NY,15-BUF,33A-11.tif\" target=\"_blank\" rel=\"noopener\">Jet Lowe, Historic American Engineering Record \/ Wikimedia Commons, public domain<\/a><\/figcaption><\/figure>\n\n\n<h2 style=\"padding-top:22px\">Approved versus accepted<\/h2>\n\n<p>This is the distinction that sorts the binding pages from the rest. Order 8110.54A states that the airworthiness regulations require ICA to be acceptable to the FAA, while certain portions must be approved, such as the Airworthiness Limitations Section. For imported products it spells it out: approval is required for the ALS, certification maintenance requirements may be involved and approved as well, and &ldquo;the balance of the ICA must be accepted.&rdquo;<\/p>\n\n<p>Accepted means the FAA has evaluated the instructions and found that they meet the regulations. It does not turn every recommended interval into a legal requirement. The 2011 interpretation, written in reply to a request asking whether the intervals in a Beech Baron&rsquo;s manuals were binding, explains why: if manufacturers could make their own intervals mandatory, private companies would be issuing rules without the public notice and comment that the Administrative Procedure Act requires.<\/p>\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #1565c0;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7\"><div><em>&ldquo;As a general proposition, manufacturer&rsquo;s maintenance manuals, service bulletins, and inspection programs (with limited exceptions not pertinent here) are not FAA-approved and are not mandatory; nor are subsequently issued changes to maintenance manuals or inspection programs.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>FAA Office of the Chief Counsel<\/strong> &mdash; Legal interpretation to Albert T. MacMillan, 22 April 2011<\/div><\/div><\/div>\n\n\n<p>That is why, as AOPA&rsquo;s maintenance column put it in 2021, engine time between overhauls, service bulletins and service letters are advisory rather than mandatory for the average Part 91 operator. An Airworthiness Directive can make a task mandatory, and so can the ALS. Commercial operators are a different case: their maintenance programmes are approved through operations specifications, which is where the <a href=\"https:\/\/migflug.com\/afterburner\/msg-3-maintenance-review-board-how-airliner-inspection-intervals-are-set\/\">MSG-3 and Maintenance Review Board process<\/a> comes in.<\/p>\n\n\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0 8px\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/Rgq1h5EgfWY\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\n\n<p style=\"font-size:13px;color:#777;text-align:center;font-style:italic;margin:0 0 24px\">Cessna on its Instructions for Continued Airworthiness documents, from the manufacturer&rsquo;s side of the process.<\/p>\n\n<h2 style=\"padding-top:22px\">Not mandatory is not optional<\/h2>\n\n<p>None of this licenses a mechanic to throw the manual away. Section 43.13(a) requires maintenance to be done with the methods, techniques and practices in the current manufacturer&rsquo;s maintenance manual or ICA, or other methods acceptable to the FAA. The same 2011 letter closes that door firmly.<\/p>\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #d32f2f;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7\"><div><em>&ldquo;The maintenance provider is not free to ignore the manufacturer&rsquo;s manual and either do nothing or perform the maintenance in such a manner that would not be acceptable.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>FAA Office of the Chief Counsel<\/strong> &mdash; Legal interpretation to Albert T. MacMillan, 22 April 2011<\/div><\/div><\/div>\n\n\n<p>Section 43.13(b) adds that the finished work must leave the product at least equal to its original or properly altered condition. In practice the manual remains the default, and an alternative has to be defensible to an inspector who asks why it was used.<\/p>\n\n<p>So the honest answer to &ldquo;must you obey the maintenance manual?&rdquo; has three parts. The manufacturer writes all of it. The FAA accepts most of it as a sound basis for maintenance, and approves one segregated section. That section, with its replacement times, inspection intervals and limit of validity, is the part that grounds an aeroplane when it is ignored.<\/p>\n\n\n\n<p><em>Sources: eCFR (14 CFR 21.31, 21.50, 25.1529, Part 25 Appendix H, 43.13, 43.16, 91.403), FAA Order 8110.54A Instructions for Continued Airworthiness, FAA Office of the Chief Counsel legal interpretation (MacMillan, 2011), AOPA<\/em><\/p>\n<!-- mfsh:bottom -->\n\n<button type=\"button\" class=\"mfsh-trigger mfsh-bottom\" data-mfsh-placement=\"bottom\" aria-haspopup=\"dialog\"><svg><use href=\"#mfsh-i-share\"\/><\/svg>Share this story<\/button>\n\n<!-- \/mfsh:bottom -->\n\n<p class=\"mf-photo-credits\" data-no-translation style=\"font-size:13px;color:#777;font-style:italic;margin:6px 0 18px\">Header photo: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:United_737_at_Orlando_Maintenance_Hangar.jpg\" target=\"_blank\" rel=\"noopener\">Caholguin109 \/ Wikimedia Commons, CC BY-SA 4.0<\/a><\/p>\n\n\n<style>.mfq{margin:34px 0 8px}.mfq h2{font:26px\/1.3 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117;padding-top:22px;margin:0 0 6px}.mfq .qa details{border-top:1px solid #5C91FF;margin:0;padding:0}.mfq .qa details:last-of-type{border-bottom:1px solid #e2e7ee}.mfq .qa summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;font:18px\/1.7 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117}.mfq .qa summary::-webkit-details-marker{display:none}.mfq .qa summary::after{content:\"+\";font:24px Helvetica,sans-serif;color:#3568e0;flex:0 0 auto}.mfq .qa details[open] summary::after{content:\"\\2013\"}.mfq .qa details:hover summary{color:#3568e0}.mfq .qa .a{font:16px\/1.7 \"Gilroy regular\",Helvetica,Arial,sans-serif;color:#454e5e;padding:0 26px 24px}.mfq .qa .a a{color:#3568e0}@media(max-width:680px){.mfq .qa summary{padding:18px 14px;font-size:17px}.mfq .qa .a{padding:0 14px 20px}}<\/style>\n\n\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What are Instructions for Continued Airworthiness?<\/summary><div class=\"a\">Instructions for Continued Airworthiness (ICA) are the maintenance data a manufacturer must provide for an aircraft, engine or propeller: servicing information, inspection schedules, troubleshooting, removal and replacement procedures, special inspection techniques, fastener data and special tools. Under 14 CFR 21.50(b) the type certificate or STC holder must furnish them to the owner.<\/div><\/details><details><summary>Who writes the Instructions for Continued Airworthiness?<\/summary><div class=\"a\">The design approval holder writes them, not the FAA. Under 14 CFR 21.50(b), the holder of a type certificate or supplemental type certificate applied for after 28 January 1981 must furnish complete ICA to the owner on delivery or first standard airworthiness certificate, whichever is later, and make changes available to anyone required to comply.<\/div><\/details><details><summary>Are Instructions for Continued Airworthiness mandatory?<\/summary><div class=\"a\">Only partly. The Airworthiness Limitations Section is FAA-approved and mandatory under 14 CFR 43.16 and 91.403(c). In a 2011 legal interpretation the FAA Chief Counsel said manufacturer maintenance manuals, service bulletins and inspection programs are generally not FAA-approved and not mandatory, although 43.13 still requires the manual or another acceptable method to be used.<\/div><\/details><details><summary>What is the Airworthiness Limitations Section?<\/summary><div class=\"a\">The Airworthiness Limitations Section is a segregated part of the ICA listing mandatory replacement times, structural inspection intervals and related procedures. For transport aeroplanes, Part 25 Appendix H also requires fuel tank and lightning protection limitations, wiring replacement times, certification maintenance requirements and a limit of validity. It is part of the type design under 14 CFR 21.31(c).<\/div><\/details><details><summary>What is the difference between FAA-approved and FAA-accepted ICA?<\/summary><div class=\"a\">FAA Order 8110.54A says ICA must be acceptable to the FAA, while certain portions, such as the Airworthiness Limitations Section, must be approved. Accepted means the FAA found the instructions meet the regulations. Approved data, like the ALS, carries mandatory force through 14 CFR 43.16 and 91.403(c).<\/div><\/details><details><summary>Is engine TBO mandatory for private aircraft?<\/summary><div class=\"a\">For the average Part 91 operator, engine time between overhaul is advisory rather than mandatory, as AOPA explained in 2021, unless it appears in an Airworthiness Limitations Section or an Airworthiness Directive. The FAA Chief Counsel&rsquo;s 2011 interpretation reached the same general conclusion about intervals in manufacturer manuals.<\/div><\/details><\/div><\/section>\n\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What are Instructions for Continued Airworthiness?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Instructions for Continued Airworthiness (ICA) are the maintenance data a manufacturer must provide for an aircraft, engine or propeller: servicing information, inspection schedules, troubleshooting, removal and replacement procedures, special inspection techniques, fastener data and special tools. Under 14 CFR 21.50(b) the type certificate or STC holder must furnish them to the owner.\"}},{\"@type\":\"Question\",\"name\":\"Who writes the Instructions for Continued Airworthiness?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The design approval holder writes them, not the FAA. Under 14 CFR 21.50(b), the holder of a type certificate or supplemental type certificate applied for after 28 January 1981 must furnish complete ICA to the owner on delivery or first standard airworthiness certificate, whichever is later, and make changes available to anyone required to comply.\"}},{\"@type\":\"Question\",\"name\":\"Are Instructions for Continued Airworthiness mandatory?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Only partly. The Airworthiness Limitations Section is FAA-approved and mandatory under 14 CFR 43.16 and 91.403(c). 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The FAA Chief Counsel\u2019s 2011 interpretation reached the same general conclusion about intervals in manufacturer manuals.\"}}]}<\/script><div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px\"><p style=\"margin:0 0 8px;font-weight:600;color:#333\">Related Posts<\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/life-limited-parts-llp-turbine-disc-cycles-mutilation-explained\/\">Life-Limited Parts: Why a Good Turbine Disc Gets Cut in Half<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/msg-3-maintenance-review-board-how-airliner-inspection-intervals-are-set\/\">MSG-3 and the Maintenance Review Board: Who Sets Inspection Intervals<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/full-scale-fatigue-test-boeing-777-9-limit-of-validity-wfd\/\">Boeing 777-9 Fatigue Test: The Rig That Runs for Years<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/faa-saib-service-bulletin-airworthiness-directive-mandatory\/\">FAA SAIBs and Service Bulletins: What Is Actually Mandatory<\/a><\/p><\/div>\n\n\n<!--mfcred1-->","protected":false},"excerpt":{"rendered":"<p>The manufacturer writes the maintenance manual, the FAA accepts it, and only one segregated section is FAA-approved and mandatory. How ICA and the Airworthiness Limitations Section work.<\/p>","protected":false},"author":23,"featured_media":32436601,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[665],"tags":[],"class_list":["post-32436706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation-world"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Instructions for Continued Airworthiness | MiGFlug<\/title>\n<meta name=\"description\" content=\"Instructions for continued airworthiness: who writes them, what Appendix H requires, and why only the Airworthiness Limitations Section binds.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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