{"id":"F2006B03217","name":"AD/B747/36 Amdt 1 - Frame to Tension Tie Joint Body Station 760 or 780","slug":"ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42589,"registerId":"commonwealth-F2006B03217-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/36 Amdt 1 - Frame to Tension Tie Joint Body Station 760 or 780","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 747 Series Aeroplanes\n\n \n\nAD/B747/36\n\nAmdt 1\n\n\nFrame to Tension Tie Joint Body Station 760 or 780 2/86\n\n \n\nApplicability: All aircraft listed in the Requirement Document. Requirement: Boeing SB 747-53-2088 Revision 2.\n\nCompliance: Prior to achieving 10,000 flight cycles.\n\n \n\nBackground: Cracking was found on the B747 fatigue test airframe. This AD has been raised because SB 53-2088 has been identified by the B747 Supplemental Structural Inspection Document as having flight safety implications. This amendment reflects the revision status of the S.B.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1660},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope: addressing a specific structural fatigue issue discovered during testing of Boeing 747 aircraft at defined body stations. It has not expanded beyond ensuring airworthiness of the frame-to-tension-tie joints at the specified locations."},"complexity_factors":["Relies entirely on external technical documents (Boeing Service Bulletin) without reproducing the actual inspection or repair procedures","Uses specialized aviation engineering terminology (body stations, tension tie joints, flight cycles) requiring technical knowledge to interpret","Requires tracking of document versions and amendments (Rev 2, Amdt 1) to ensure compliance with the correct technical standard"],"plain_english_summary":"**What it is:** This is a safety order (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority for all Boeing 747 aircraft operators.\n\n**What it requires:** Airlines must follow a specific Boeing technical instruction (Service Bulletin 747-53-2088 Revision 2) to inspect and repair potential cracks where the aircraft's frame connects to tension ties at specific structural locations (Body Stations 760 or 780). This maintenance must be completed before the aircraft reaches 10,000 flight cycles (roughly 10,000 takeoff-and-landing trips).\n\n**Why it matters:** Engineers discovered cracking in these joints during fatigue testing of a 747 airframe. Because failures in these areas could compromise the aircraft's structural integrity during flight, this directive mandates repairs to prevent catastrophic failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780","history":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780/history","analysis":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780/analysis","conflicts":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780/conflicts","importantCases":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780/important-cases","documents":"/api/acts/ad-b747-36-amdt-1-frame-to-tension-tie-joint-body-station-760-or-780/documents"}}