{"id":"F2006B06240","name":"AD/PITTS S-2/11 Amdt 1 - Aileron Spar - Inspection and Modification","slug":"ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47192,"registerId":"commonwealth-F2006B06240-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PITTS S-2/11 Amdt 1 - Aileron Spar - Inspection and Modification","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)  Pitts S-1 and S-2 Series Aeroplanes\n\n \n\nAD/PITTS S-2/11\n\nAmdt 1\n\n\nAileron Spar - Inspection and Modification 2/77\n\n \n\nApplicability: All models with metal Aileron Spars.\n\n \n\nRequirement: Inspect and modify the aileron spars of all ailerons at the hinge bracket attachment in accordance with Pitts SL No. 4.\n\n \n\nNote: Similarity of aileron construction at hinge bracket attachment allows use of SL No. 4, on all Pitts model S-1 and S-2 aeroplanes for this inspection and modification.\n\n \n\nCompliance: Unless already accomplished, within 100 hours time in service after 28 February 1977.\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":1809},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The scope remains tightly focused on the original purpose: mandating inspection and modification of aileron spars for the specified Pitts aircraft models. There is no indication of scope creep into unrelated systems or aircraft types."},"complexity_factors":["Single operative requirement (inspect and modify)","External cross-reference to manufacturer document (Pitts SL No. 4)","Simple conditional compliance deadline (100 hours time in service after fixed date)","Narrow applicability limited to specific aircraft series with defined feature (metal spars)"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of Pitts S‑1 and S‑2 aeroplanes with metal aileron spars to inspect and modify the aileron spar attachment at the hinge brackets per the manufacturer’s Service Letter No. 4. Work must be done within 100 flight hours after 28 February 1977 (unless already accomplished). The action prevents possible structural failure of the aileron attachment and protects control-surface integrity."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification","history":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification/history","analysis":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification/important-cases","documents":"/api/acts/ad-pitts-s-2-11-amdt-1-aileron-spar-inspection-and-modification/documents"}}