{"id":"F2006B04916","name":"AD/CESSNA 150/18 Amdt 1 - Aileron Mass Balance Weight Attachment Rivets","slug":"ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44760,"registerId":"commonwealth-F2006B04916-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 150/18 Amdt 1 - Aileron Mass Balance Weight Attachment Rivets","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)  Cessna 150, F150, 152 & F152 Series Aeroplanes\n\n \n\nAD/CESSNA 150/18\n\nAmdt 1\n\nApplicability: All models.\n\n\nAileron Mass Balance Weight Attachment Rivets\n\n\n9/72\n\n \n\nRequirement: Inspect the rivets attaching the lower aileron skin to the balance weight for corrosion.\n\nWhere corrosion is suspected under the rivet heads attempts should be made to remove the rivet heads by a light sharp sideways blow with a screwdriver. All damaged or corroded rivets must be replaced.\n\n \n\nCompliance: Within 100 hours time in service after 29 September 1972 and thereafter at intervals not exceeding 100 hours time in service after 29 September 1972.\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":1959},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original narrow scope addressing specific corrosion risks in aileron mass balance weight rivets on Cessna 150/152 aircraft. As Amendment 1, it likely refined technical procedures or compliance dates without expanding beyond the original safety purpose of preventing aileron balance weight detachment."},"complexity_factors":["Single, discrete maintenance requirement with no subsections or nested conditional logic","Self-contained directive with minimal cross-referencing to other instruments","Limited technical vocabulary (standard aviation maintenance terms: rivets, ailerons, time in service)","Straightforward compliance structure (one-time initial inspection plus recurring hourly intervals)"],"plain_english_summary":"This rule requires owners/operators of Cessna 150/152 (including F150/F152) to inspect rivets that attach the lower aileron skin to the balance weight for corrosion, remove suspect rivet heads with a light side strike, and replace any corroded or damaged rivets.  \n\nInspections are due within 100 flight hours of 29 Sept 1972 and every 100 hours thereafter to prevent balance-weight detachment and hazardous aileron flutter."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets","history":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets/history","analysis":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets/analysis","conflicts":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets/conflicts","importantCases":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets/important-cases","documents":"/api/acts/ad-cessna-150-18-amdt-1-aileron-mass-balance-weight-attachment-rivets/documents"}}