{"id":"F2010L00582","name":"AD/B767/255 - Nacelle Strut and Wing Structure - RR Engines","slug":"ad-b767-255-nacelle-strut-and-wing-structure-rr-engines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":123644,"registerId":"commonwealth-F2010L00582-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/B767/255 | Nacelle Strut and Wing Structure - RR Engines | 4/2010 |\n| ----------- | --------------------------------------------- | ------ |\n\n| Applicability: | Model 767 series aircraft powered by Rolls-Royce RB211 series engines, line numbers 1 through 663.                                                                                                                                                                                                                                                                                                   |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Modify in accordance with the technical requirements of FAA AD 2000-19-09 Amdt 39-11910.Note: Boeing Service Bulletin 767-54-0082, or later FAA approved revision, refers.                                                                                                                                                                                                                           |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 26 February 2010.                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | This Directive requires modification of the nacelle strut and wing structure. This action is necessary to prevent fatigue cracking in primary strut structure and consequent reduced structural integrity of the strut.This new Directive reflects the requirements of AD/B767/130 which was inadvertently cancelled during the cancellation of AD/B767/78 Amdt 1; in response to FAA AD 2010-03-08. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n25 February 2010","sortOrder":0},{"sectionNumber":"AD/B767/255","sectionType":"part","heading":"AD/B767/255","content":"## AD/B767/255","sortOrder":1},{"sectionNumber":"Nacelle Strut and Wing Structure - RR En","sectionType":"part","heading":"Nacelle Strut and Wing Structure - RR Engines","content":"## Nacelle Strut and Wing Structure \\- RR Engines","sortOrder":2},{"sectionNumber":"4/2010","sectionType":"part","heading":"4/2010","content":"## 4/2010","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Restores and reflects the requirements of the earlier AD/B767/130 after that AD was inadvertently cancelled; effectively reinstates the original safety-modification obligation for RB211‑equipped 767s (line numbers 1–663) as set out in FAA AD 2000‑19‑09 and Boeing Service Bulletin 767‑54‑0082."},"complexity_factors":["Narrow applicability: specific to Boeing 767s with Rolls‑Royce RB211 engines, line numbers 1–663.","Cross-reference to external instruments: requires compliance with FAA AD 2000‑19‑09 and Boeing Service Bulletin 767‑54‑0082 (or later FAA‑approved revision).","Compliance details delegated to a separate 'Requirement' document (not reproduced here), creating dependent interpretation/coordination.","Administrative history: reinstates requirements from an earlier AD that was inadvertently cancelled, requiring reconciliation with prior directives.","Technical nature of work: modification of primary nacelle strut and wing structure requires engineering approval, maintenance resources and aircraft downtime."],"plain_english_summary":"Mandates modification of the nacelle strut and adjacent wing structure on Boeing 767 aeroplanes fitted with Rolls‑Royce RB211 engines (line numbers 1–663) to the technical standards in FAA AD 2000‑19‑09 and Boeing Service Bulletin 767‑54‑0082 (or later FAA‑approved revision). The stated purpose is to prevent fatigue cracking and loss of strut integrity. Aircraft operators and maintenance organisations must carry out the work per the Requirement document and meet the compliance timetable, and will bear the cost and operational downtime of those modifications."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains the original scope of aircraft safety regulation. It is a corrective re-issue of a previously cancelled directive (AD/B767/130) and does not expand beyond the original safety purpose of preventing fatigue cracking in engine mounting structures."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly understood (line numbers)","No cross-references to Australian legislation — only references to external FAA and Boeing documents","Simple conditional structure: single applicability criterion and single requirement","No nested exceptions or complex compliance calculations","Essentially adopts external technical requirements by reference rather than setting out detailed technical specifications"],"plain_english_summary":"This CASA Airworthiness Directive mandates that owners/operators of Boeing 767s with Rolls‑Royce RB211 engines (line numbers 1–663) modify the nacelle strut and adjacent wing structure per FAA AD 2000‑19‑09 and Boeing Service Bulletin 767‑54‑0082 to prevent fatigue cracking in the engine mount.\n\nIt reinstates requirements accidentally cancelled earlier and references updated FAA guidance to restore the original safety mandate."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines","history":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines/history","analysis":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines/analysis","conflicts":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines/conflicts","importantCases":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines/important-cases","documents":"/api/acts/ad-b767-255-nacelle-strut-and-wing-structure-rr-engines/documents"}}