{"id":"F2006B02670","name":"AD/B727/147 Amdt 1 - Fuselage Frames at BS 760.95, 783.95, 825.95 and 848.95","slug":"ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41986,"registerId":"commonwealth-F2006B02670-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/147 Amdt 1 - Fuselage Frames at BS 760.95, 783.95, 825.95 and 848.95","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBoeing 727 Series Aeroplanes\n\nAD/B727/147\n\nAmdt 1\n\n  \n\nFuselage Frames at BS 760.95, 783.95, 825.95 and 848.95\n\n  \n8/95\n\nApplicability: All B727 aircraft, all models.\n\nRequirement: Action in accordance with the technical requirements of Boeing Service Bulletin 727- 53-0197, Revision 2.\n\nNote: FAA AD 94-02-04 Amdt 39-8802 refers.\n\nCompliance: Before accumulating 12 000 flights or within 3000 flights from 27 April 1995, whichever occurs later.\n\nRepeat the inspection at intervals not to exceed 6000 flights until modified in accordance with Boeing Service Bulletin 727-53-0197, Revision 2.\n\nThe changes introduced by this Amendment are effective from 20 July 1995.\n\nBackground: Reports have been received of cracks in subject frames which varied from 0.25 to 6.0 inches in length. Operation with cracked frames may reduce the structural integrity of the airframe. Amendment 1 references Boeing SB 727-53-0197, Revision 2, which increases the inspection area to include the outboard flange of frame 783.95 where cracks up to 6 inches long have been reported. Aircraft inspected or modified in accordance with SB 727-53-0197, initial issue or Revision 1 require extra work.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of the airworthiness directive. It updates the technical reference to a revised Boeing service bulletin and expands the inspection area based on new safety data, but does not fundamentally alter the purpose or broaden the regulatory reach beyond the specific structural issue being addressed."},"complexity_factors":["Technical aviation terminology requiring specialized knowledge (fuselage frames, BS stations, flanges, service bulletins)","Cross-reference to external Boeing technical document (Service Bulletin 727-53-0197, Revision 2) and FAA AD 94-02-04","Conditional compliance deadlines with 'whichever occurs later' logic","Nested requirements: initial inspection + repeat inspections until modification","Retroactive implications: aircraft already inspected under earlier bulletin versions require extra work"],"plain_english_summary":"This safety directive requires operators of all Boeing 727s in Australia to inspect specific fuselage frames for dangerous cracks, follow Boeing Service Bulletin 727-53-0197 Revision 2, meet near-term inspection deadlines, and repeat checks until permanent repairs are done. \n\nIt matters because cracks up to 6\" were found; Revision 2 expands inspection to the outboard flange of frame 783.95 and may require additional work beyond earlier inspections."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. Amendment 1 expands the inspection scope by adding the outboard flange of frame 783.95 (where cracks up to 6 inches were reported) and imposes extra work for aircraft previously inspected or modified under the initial or Revision 1 service bulletins, thereby broadening the affected inspection tasks and compliance burden."},"complexity_factors":["Cross-reference to an external technical document (Boeing Service Bulletin 727-53-0197 Revision 2) for required actions","Time-based and flight-count compliance calculus (before 12,000 flights or within 3,000 flights from 27 April 1995; repeat every 6,000 flights)","Requirement to continue inspections until modification is completed, creating ongoing maintenance scheduling","Amendment expands inspection area (adds outboard flange of frame 783.95) increasing scope of inspections","Aircraft previously inspected or modified under earlier SB issues may require additional remedial work","Applies to all B727 models (broad applicability increases administrative reach)"],"plain_english_summary":"This airworthiness directive requires all Boeing 727 aircraft to be inspected and, if necessary, modified in line with Boeing Service Bulletin 727-53-0197 Revision 2. It sets a compliance window (before 12,000 flights or within 3,000 flights from 27 April 1995) and mandates repeat inspections every 6,000 flights until the modification is done. The amendment expands the inspection area to include the outboard flange of frame 783.95 after reports of 0.25–6.0 inch cracks; operators pay for inspections, repairs and any extra work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95","history":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95/history","analysis":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95/analysis","conflicts":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95/conflicts","importantCases":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95/important-cases","documents":"/api/acts/ad-b727-147-amdt-1-fuselage-frames-at-bs-760-95-783-95-825-95-and-848-95/documents"}}