{"id":"F2005L00845","name":"AD/B767/20 Amdt 3 - BS 1582 Pressure Bulkhead","slug":"ad-b767-20-amdt-3-bs-1582-pressure-bulkhead","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":113188,"registerId":"commonwealth-F2005L00845-current","compilationNumber":null,"startDate":"2026-04-03","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/B767/20 Amdt 3 | BS 1582 Pressure Bulkhead | 5/2005 |\n| ----------------- | ------------------------- | ------ |\n\n| Applicability: | Model 767-200 and -300 series aircraft, as identified in Boeing Alert Service Bulletin 767-53A0026 Revision 5.                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2005-03-11 Amdt 39-13967.Note: Boeing Alert Service Bulletin 767-53A0026 Revision 5, or later FAA approved revision, refers.                                                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 12 May 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Amendment becomes effective on 12 May 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| Background:    | Damage on the aft side of the pressure bulkhead sustained during maintenance or occurring in service, if not corrected, could lead to failure of the aft pressure bulkhead and depressurisation of the aircraft.Amendment 1 included procedures for inspection after 25,000 flight cycles.Amendment 2 required a reduction of the interval for the detailed and repetitive eddy current inspections.Amendment 3 is issued in response to a new FAA AD, which was prompted by reports of cracking at “oil-can” boundaries on the aft pressure bulkhead. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n31 March 2005","sortOrder":0},{"sectionNumber":"AD/B767/20 Amdt 3","sectionType":"part","heading":"AD/B767/20 Amdt 3","content":"## AD/B767/20 Amdt 3","sortOrder":1},{"sectionNumber":"BS 1582 Pressure Bulkhead","sectionType":"part","heading":"BS 1582 Pressure Bulkhead","content":"## BS 1582 Pressure Bulkhead","sortOrder":2},{"sectionNumber":"5/2005","sectionType":"part","heading":"5/2005","content":"## 5/2005","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":4,"scope_assessment":{"changed":true,"description":"Amendment 3 changes the AD's inspection regime by aligning with a new FAA AD addressing cracking at 'oil‑can' boundaries, shortening inspection intervals and specifying actions under Boeing Alert Service Bulletin 767-53A0026 Revision 5; it thereby narrows and intensifies enforcement on the aft pressure bulkhead beyond earlier amendments (Requirement / Background / Compliance)."},"complexity_factors":["Cross-references to external mandatory documents: FAA AD 2005-03-11 and Boeing Alert Service Bulletin 767-53A0026 Revision 5 increase dependency on outside technical material (Requirement).","Technical inspection methods: requirement for detailed and repetitive eddy‑current inspections requires specialised non‑destructive testing capability and trained personnel (Background).","Variable inspection intervals and flight‑cycle thresholds: operators must track cycles and update maintenance schedules to meet revised intervals (Background / Compliance).","Targeted applicability: applies only to specified 767-200/-300 aircraft identified in the Boeing service bulletin, concentrating costs and operational impact on particular operators (Applicability).","Amendment history and effective date: multiple amendments and a revised effective date (12 May 2005) require operators to reconcile prior compliance actions and amend maintenance programs (Compliance).","Potential for consequential costs and downtime: inspections that identify cracking will trigger repairs, parts, and aircraft grounding time, shifting direct costs to operators (Background)."],"plain_english_summary":"Requires operators of Boeing 767-200 and -300 series identified in Boeing Alert Service Bulletin 767-53A0026 Revision 5 to perform inspections and corrective work on the aft (BS 1582) pressure bulkhead in line with FAA AD 2005-03-11; the amendment became effective 12 May 2005. Operators and maintenance organisations pay for inspections and repairs, must track flight cycles and shortened inspection intervals, and follow FAA/Boeing technical procedures because reported cracking at “oil‑can” boundaries could lead to depressurisation."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains its original narrow scope — safety inspections of the Boeing 767 aft pressure bulkhead. While Amendment 3 tightens inspection intervals based on new cracking data, it does not expand beyond the original purpose of ensuring pressure bulkhead integrity. The progressive amendments reflect iterative risk refinement rather than scope creep."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words)","Only 1 defined term implicitly referenced (\"oil-can\" boundaries — explained in background but not formally defined)","Heavy reliance on external documents: incorporates by reference both FAA AD 2005-03-11 and Boeing Alert Service Bulletin 767-53A0026 Revision 5","Simple conditional structure: if aircraft matches applicability → must comply with external requirements","No nested exceptions or complex logical operators","Amendment history (3 versions) adds contextual complexity but not structural complexity to the instrument itself"],"plain_english_summary":"This AD mandates inspections and repairs of the aft pressure bulkhead on certain Boeing 767-200/-300 aircraft to detect and fix maintenance damage or in-service cracking that could cause rapid cabin depressurisation. It requires eddy-current inspections per FAA and Boeing instructions, tightens intervals after new “oil-can” boundary cracking reports, and applies to operators of the affected airplanes to prevent catastrophic structural failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead","history":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead/history","analysis":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead/analysis","conflicts":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead/conflicts","importantCases":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead/important-cases","documents":"/api/acts/ad-b767-20-amdt-3-bs-1582-pressure-bulkhead/documents"}}