{"id":"F2006B02995","name":"AD/B737/94 - Outboard Chords of BS 727 Frame and Stringer 18A","slug":"ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42354,"registerId":"commonwealth-F2006B02995-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/94 - Outboard Chords of BS 727 Frame and Stringer 18A","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 737 Series Aeroplanes\n\n \n\nAD/B737/94 Outboard Chords of BS 727 Frame and Stringer 18A 11/95\n\nApplicability: Model 737-100 and 200 series aircraft with line numbers 1 through 999. Requirement:               Action in accordance with the technical requirements of FAA AD 95-12-17 Amdt 39-\n\n9268.\n\n \n\nNote: Boeing Service Bulletins 737-53-1088 and 737-53A1166 refer.\n\n \n\nCompliance: As specified in the Requirement Document.\n\n \n\nBackground: The FAA received reports of fatigue cracks in the outboard chord of the frame at BS 727, and in the outboard chord of stringer 18A. This Directive requires on-going repetitive inspections, with terminating action required if cracking is detected.\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":1595},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a tightly focused scope on specific structural inspection requirements for defined aircraft models, consistent with standard airworthiness directive practice. It does not expand beyond the original safety purpose of addressing fatigue cracking in specific airframe components."},"complexity_factors":["Reference to external technical document (FAA AD 95-12-17) without inclusion of substantive requirements","Technical aviation terminology requiring specialist knowledge (BS 727 frame, Stringer 18A, outboard chords, line numbers)","Limited applicability to specific aircraft serial numbers (1-999) requiring verification against aircraft records"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators of Boeing 737-100/-200 (MSN 1–999) to carry out repeated inspections of outboard chord areas at BS 727 and Stringer 18A for fatigue cracking, and to perform mandated repairs or replacements if cracks are found following FAA AD 95-12-17.  \n\nThis mandatory action targets ageing-structure cracking to prevent potential structural failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a","history":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a/history","analysis":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a/analysis","conflicts":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a/conflicts","importantCases":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a/important-cases","documents":"/api/acts/ad-b737-94-outboard-chords-of-bs-727-frame-and-stringer-18a/documents"}}