{"id":"F2006B02663","name":"AD/B727/140 - Body Station 950 Side Fitting","slug":"ad-b727-140-body-station-950-side-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41979,"registerId":"commonwealth-F2006B02663-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/140 - Body Station 950 Side Fitting","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 727 Series Aeroplanes\n\n \n\nAD/B727/140 Body Station 950 Side Fitting 7/92\n\nApplicability: Model 727 series, listed in Boeing SB 27-53-0126 Revision 6.\n\n \n\nRequirement: Action IAW the technical requirements of FAA AD 92-06-14 Amdt 39-8194.\n\n \n\nNote: Boeing SB 727-53-0196 and SB 727-53-0126 Revision 6 refer.\n\n \n\nCompliance: As specified in the Requirement Document with a revised effective date of 25 June 1992.\n\n \n\nBackground: The FAA has received reports of cracks and web separations of the BS 950 side fitting. The actions specified in this directive are intended to prevent failure of the fitting and subsequent depressurisation of the aircraft.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on the BS 950 side fitting defect. It has not expanded beyond its original purpose of addressing this specific structural integrity issue."},"complexity_factors":["Very short document (under 200 words)","Only 1 substantive requirement: comply with external FAA directive","No defined terms section — relies entirely on external technical references","No conditional logic or nested exceptions","Single applicability criterion (specific Boeing models)","Cross-references to 3 external technical documents (FAA AD, Boeing SBs) but does not reproduce their content"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific Boeing 727 aircraft.\n\n**What it does:** It requires owners and operators of certain Boeing 727 series planes to inspect and repair a specific structural part called the \"Body Station 950 side fitting\" — a metal component in the aircraft's fuselage (body). The directive mandates following technical instructions from a US Federal Aviation Administration (FAA) safety order (AD 92-06-14).\n\n**Who it affects:** Operators of Boeing 727 aircraft models listed in Boeing Service Bulletin 27-53-0126 Revision 6.\n\n**Why it matters:** The FAA found cracks and separations in this fitting that could cause **catastrophic failure** — potentially leading to sudden loss of cabin pressure (depressurisation) at altitude. This directive prevents accidents by forcing repairs before failure occurs.\n\n**Key deadline:** Compliance required by 25 June 1992 (as revised)."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The instrument does not indicate a change to the substantive population of aircraft or to the technical measures; it reiterates that affected Model 727 series aircraft listed in Boeing SB 27-53-0126 Rev 6 must comply with FAA AD 92-06-14 and related Boeing service bulletins. The only explicit procedural change noted in this text is a revised effective date of 25 June 1992 for the Requirement Document (Compliance)."},"complexity_factors":["Relies on external technical documents (FAA AD 92-06-14 and Boeing SBs) for operative requirements, requiring users to obtain and interpret multiple documents (Requirement; Note).","Applicability is limited to aircraft listed in a specific Boeing Service Bulletin, so determining applicability requires cross-checking fleet records against that SB (Applicability).","The AD text does not include the detailed inspection/repair steps or intervals; those details live in the referenced documents, increasing procedural complexity (Requirement; Compliance).","Revised effective date is stated but no transitional guidance or penalties are set out in this text, so implementers must consult the Requirement Document and referenced AD for timing and enforcement detail (Compliance).","Technical subject matter (airframe fitting fatigue/crack inspection and repair) requires specialised maintenance skills and judgement, creating operational complexity for compliance.","Limited regulatory discretion in the text (it mandates external documents), but any interpretation disputes will require reference to FAA/Boeing materials and possibly CASA guidance."],"plain_english_summary":"This airworthiness directive requires operators of Boeing 727s listed in Boeing SB 27-53-0126 Rev 6 to carry out the technical inspections and repairs set out in FAA AD 92-06-14 and the cited Boeing service bulletins to detect and fix cracks or web separations of the BS‑950 side fitting and prevent depressurisation. It binds aircraft owners to follow those external documents, imposing inspection/repair costs, scheduling burdens, and dependence on the FAA/Boeing technical guidance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-140-body-station-950-side-fitting","history":"/api/acts/ad-b727-140-body-station-950-side-fitting/history","analysis":"/api/acts/ad-b727-140-body-station-950-side-fitting/analysis","conflicts":"/api/acts/ad-b727-140-body-station-950-side-fitting/conflicts","importantCases":"/api/acts/ad-b727-140-body-station-950-side-fitting/important-cases","documents":"/api/acts/ad-b727-140-body-station-950-side-fitting/documents"}}