{"id":"F2008L04563","name":"AD/B727/214 - AN-26 Insulation Blankets","slug":"ad-b727-214-an-26-insulation-blankets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120871,"registerId":"commonwealth-F2008L04563-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 727 Series Aeroplanes","sectionType":"division","heading":"Boeing 727 Series Aeroplanes","content":"### Boeing 727 Series Aeroplanes\n\n| AD/B727/214 | AN-26 Insulation Blankets | 1/2009 |\n| ----------- | ------------------------- | ------ |\n\n| Applicability: | Boeing 727-200 and 727-200F series aircraft, serial numbers as defined in Boeing Special Attention Service Bulletin 727-25-0300. |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Either:a. Remove all insulation blankets from the pressurized areas of the fuselage and install new insulation blankets using a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA. The new insulation blankets must comply with 14 Code of Federal Regulations (CFR) 25.856(a). The areas where the affected insulation blankets are installed include, but are not limited to, the following areas:(i) Crown area of the airplane;(ii) Areas behind flight deck panels and circuit breaker panels;(iii) Areas behind sidewalls, lavatories, closets, and galleys;(iv) Cargo compartment areas;(v) Air ducting;(vi) Waste and water tubing; and(vii) Areas attached to the underside of floor panels. ; orb. Remove the existing fuselage insulation blankets and install new insulation blankets, in accordance with the Accomplishment Instructions of the Boeing Special Attention Service Bulletin 727-25-0300.However, these actions are not required for any insulation blanket that is determined not to be constructed of Orcon Orcofilm AN-26, using an identification method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA or in accordance with Appendix A of Boeing Special Attention Service Bulletin 727-25-0300.2. No person may install any insulation blanket constructed of AN-26 as a replacement unless it has been modified to comply with 14 CFR 25.856(a). |\n\n| | Note 1: Insulation material that is part-marked with a date of manufacture indicating that it was manufactured before July 1981 or after December 1988 is not constructed of AN-26.Note 2: FAA AD 2008-23-09 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | 1. Within 96 months after the effective date of this Airworthiness Directive.2. After the effective date of this Airworthiness Directive. |\n| | This Airworthiness Directive becomes effective on 15 January 2009. |\n| Background: | This Airworthiness Directive results from reports of in-flight and ground fires on certain airplanes manufactured with insulation blankets covered with a specific polyethyleneteraphthalate (PET), ORCON Orcofilm AN-26 (all variants, including AN-26, AN-26A, and AN-26B), which may contribute to the spread of a fire when ignition occurs from sources such as electrical arcing. We are issuing this Airworthiness Directive to ensure that insulation blankets constructed of AN-26 are removed from the fuselage. Such insulation blankets could ignite and propagate a fire that is the result of electrical arcing or sparking. |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n24 November 2008","sortOrder":0},{"sectionNumber":"AD/B727/214","sectionType":"part","heading":"AD/B727/214","content":"## AD/B727/214","sortOrder":1},{"sectionNumber":"AN-26 Insulation Blankets","sectionType":"part","heading":"AN-26 Insulation Blankets","content":"## AN-26 Insulation Blankets","sortOrder":2},{"sectionNumber":"1/2009","sectionType":"part","heading":"1/2009","content":"## 1/2009","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect in a specific aircraft type. The scope remains tightly focused on the AN-26 insulation blanket fire risk as originally identified."},"complexity_factors":["Single, clearly defined applicability (specific Boeing 727 models by serial number)","Two alternative compliance paths (Option A or Option B) with clear conditions","Two specific exceptions to the main requirement (non-AN-26 determination and date-based exclusion)","Cross-reference to external documents: Boeing Special Attention Service Bulletin 727-25-0300 and US regulation 14 CFR 25.856(a)","Reference to FAA AD 2008-23-09 in a note","Moderate technical terminology (pressurized areas, PET, electrical arcing) but explained in context","Simple temporal compliance structure (single deadline of 96 months plus ongoing prohibition)"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of Boeing 727-200/727-200F to remove and replace Orcon Orcofilm AN-26 insulation from pressurized areas because it can ignite and spread fire from electrical arcing. Replacement must meet FAA-approved methods or Boeing service bulletin 727-25-0300; proven non-AN-26 blankets or those made before July 1981/after Dec 1988 are exempt.\n\nThe AD also bans installing AN-26 as a replacement unless modified to meet 14 CFR 25.856(a). Compliance was required within 96 months of 15 Jan 2009."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The directive consistently focuses on identification, removal and replacement (or approved method) of AN‑26 insulation blankets in specified Boeing 727‑200/-200F aircraft and sets a compliance deadline. The text provides no indication that its scope has been altered from that core objective; it ties applicability to Boeing service bulletin serial numbers and allows limited exceptions by date mark or FAA ACO‑approved identification (Applicability; Requirement 1; Note 1)."},"complexity_factors":["Two alternative mandated compliance routes (remove/install using FAA ACO‑approved method OR remove/install per Boeing Special Attention Service Bulletin 727‑25‑0300) (Requirement 1.a/1.b)","Requirement for FAA Seattle ACO approval for identification methods and installation methods creates discretionary certification steps (Requirement 1.a, Note in Requirement 1.b)","Technical compliance reference to an external standard (14 CFR 25.856(a)) for replacement/modification material performance (Requirement 1.a/1.b and Requirement 2)","Wide range of affected locations within the aircraft (crown, behind panels, sidewalls, cargo areas, ducts, underfloor, etc.), increasing inspection/repair scope (Requirement 1.a list)","Applicability limited to serial numbers defined in an external Boeing service bulletin, requiring cross‑reference to that document to determine covered aircraft (Applicability)","Exemption based on manufacture date mark (pre‑July 1981 or post‑December 1988) requiring material traceability checks (Note 1)","Long but single compliance window (within 96 months) combined with ongoing prohibition on installing unmodified AN‑26 after the effective date (Compliance 1 and Requirement 2)","Reference to another FAA AD (2008‑23‑09) and to Boeing SB Appendix A for approved identification methods adds external dependencies to full compliance (Note 2 and Requirement 1.b)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Boeing 727‑200 and 727‑200F aircraft to remove or verify the absence of Orcon Orcofilm AN‑26 insulation blankets in pressurised fuselage areas and to replace any AN‑26 with insulation that meets 14 CFR 25.856(a). It also bans reinstalling AN‑26 unless modified to meet that standard. The rule affects aircraft owners, maintenance organisations and operators who must perform approved identification and replacement work within the specified compliance time to reduce fire propagation risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-214-an-26-insulation-blankets","history":"/api/acts/ad-b727-214-an-26-insulation-blankets/history","analysis":"/api/acts/ad-b727-214-an-26-insulation-blankets/analysis","conflicts":"/api/acts/ad-b727-214-an-26-insulation-blankets/conflicts","importantCases":"/api/acts/ad-b727-214-an-26-insulation-blankets/important-cases","documents":"/api/acts/ad-b727-214-an-26-insulation-blankets/documents"}}