{"id":"F2007L04521","name":"AD/B767/187 Amdt 1 - Aft Pressure Bulkhead Insulation Blankets","slug":"ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70991,"registerId":"commonwealth-F2007L04521-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"division","heading":"Boeing 767 Series Aeroplanes","content":"### Boeing 767 Series Aeroplanes\n\n| AD/B767/187 Amdt 1 | Aft Pressure Bulkhead Insulation Blankets | 13/2007 |\n| ------------------ | ----------------------------------------- | ------- |\n\n| Applicability: | Model 767-200 and -300 series aircraft, as listed in Boeing Service Bulletin767-25A0300 Revision 1, dated 2 May 2002, or later approved issue.                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Modify the installation of the aft pressure bulkhead-to-floor insulation blankets in accordance with the Accomplishment Instructions of Boeing Service Bulletin767-25A0300 Revision 1 or later approved issue.Note: FAA AD 2003-13-03 Amdt 39-13203 refers.                                                                                                                                                                                                                                                                                                                                                  |\n| Compliance:    | Before 31 July 2010.Compliance with the original issue of the Airworthiness Directive constitutes compliance with this amendment.                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Amendment becomes effective on 20 December 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The actions specified by this Directive are intended to prevent interference with venting during a rapid decompression in the bulk cargo compartment. Such interference could cause damage to the floor structure and damage to certain empennage control cables, which could result in reduced controllability of the aircraft.This amendment allows the use of revision 3 of the Boeing Service Bulletin, which incorporates an FAA AMOC for substitution of materials compliant with flame propagation regulations.The original issue of this airworthiness directive became effective on 2 October 2003. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 November 2007","sortOrder":0},{"sectionNumber":"AD/B767/187 Amdt 1","sectionType":"part","heading":"AD/B767/187 Amdt 1","content":"## AD/B767/187 Amdt 1","sortOrder":1},{"sectionNumber":"Aft Pressure Bulkhead Insulation Blanket","sectionType":"part","heading":"Aft Pressure Bulkhead Insulation Blankets","content":"## Aft Pressure Bulkhead Insulation Blankets","sortOrder":2},{"sectionNumber":"13/2007","sectionType":"part","heading":"13/2007","content":"## 13/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment broadens acceptable compliance means by allowing use of later approved issues of Boeing Service Bulletin 767-25A0300 (including Revision 3) and incorporates an FAA AMOC permitting substitution of materials that meet flame propagation regulations. It leaves the original corrective action intact (compliance with the original issue still constitutes compliance) but authorises additional materials and later SB revisions as valid compliance paths. The original AD became effective 2 October 2003; this amendment became effective 20 December 2007."},"complexity_factors":["Narrow applicability: limited to Boeing 767-200 and -300 series listed in Boeing SB 767-25A0300 (reduces regulatory breadth).","Single, technical mandated action: modify insulation blankets per Boeing SB instructions (straightforward operational requirement).","Cross-reference to external documents: requires following Boeing Service Bulletin (revision-controlled) and cites FAA AD 2003-13-03, creating reliance on non‑legislative technical material.","Allowance for later approved issues and FAA AMOC: permits substitution of materials compliant with flame propagation rules, adding administrative discretion and variation in compliance methods.","Fixed compliance deadline and effective date: introduces scheduling and logistical burden for operators (deadline 31 July 2010; amendment effective 20 December 2007).","Implementation cost and technical skill: operators bear costs and must arrange maintenance/parts meeting flame-propagation requirements."],"plain_english_summary":"Requires operators of Boeing 767-200 and -300 series aircraft to modify the aft pressure bulkhead‑to‑floor insulation blankets per Boeing Service Bulletin 767-25A0300 Revision 1 (or later) by 31 July 2010. The stated purpose is to prevent insulation interfering with venting during a rapid decompression, which could damage the floor structure and empennage control cables and reduce controllability. CASA issued the amendment; operators pay to carry out the Boeing-specified work and may comply using later approved service bulletin revisions or approved material substitutions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original safety purpose (preventing vent interference during decompression). The only change is procedural: allowing operators to use a later revision of the Boeing Service Bulletin (Revision 3) that incorporates an FAA-approved alternative for materials. This is a minor technical update, not an expansion of scope."},"complexity_factors":["Single, specific technical requirement referencing an external Boeing Service Bulletin rather than spelling out detailed steps","Only 4 core operational provisions: applicability, requirement, compliance date, and background","Minimal defined terms (only standard aviation references like 'empennage' explained in context)","Simple amendment structure — adds only one new permission (use of Revision 3 of the Service Bulletin)","No nested exceptions or conditional logic; straightforward 'comply by date X' framework","Cross-references limited to one FAA AD and one Boeing Service Bulletin"],"plain_english_summary":"This Airworthiness Directive requires operators of certain Boeing 767-200/300 aircraft to modify insulation blankets where the rear pressure bulkhead meets the floor. The change prevents blankets from blocking emergency cargo-hold vents during rapid decompression—a hazard that could damage the floor, harm tail control cables, and reduce pilot control. Modifications must follow Boeing Service Bulletin 767-25A0300 (Rev 1 or later; Rev 3 allowed with FAA‑approved alternatives). Compliance was required by 31 July 2010."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets","history":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets/history","analysis":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets/analysis","conflicts":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets/conflicts","importantCases":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets/important-cases","documents":"/api/acts/ad-b767-187-amdt-1-aft-pressure-bulkhead-insulation-blankets/documents"}}