{"id":"F2006B06248","name":"AD/PITTS S-2/3 - Horizontal Stabiliser Bracing Attachment - Modification","slug":"ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47218,"registerId":"commonwealth-F2006B06248-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PITTS S-2/3 - Horizontal Stabiliser Bracing Attachment - 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-2/3 Horizontal Stabiliser Bracing Attachment - Modification\n\nApplicability: Model S-2A with S/Nos. 2001 to 2022. Document:  Pitts SB No. 4.\n\nCompliance: Within 100 hours time in service after 31 August 1973.\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\n \n\n \n\n \n\n \n\n\n8/73\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1922},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a targeted, specific safety directive addressing a known defect in particular aircraft. It has not expanded beyond its original purpose of mandating a modification to the horizontal stabiliser bracing attachments on the specified Pitts S-2A aircraft."},"complexity_factors":["Single, narrow applicability criterion (specific model and serial number range)","Single compliance action referencing an external technical standard (Service Bulletin No. 4)","Clear, absolute deadline with no conditional exceptions or extensions","No defined terms, interpretation provisions, or cross-references to other legislative provisions"],"plain_english_summary":"**What this requires**\n\nThis directive orders owners and operators of specific Pitts S-2A aeroplanes to modify the attachment points for the horizontal stabiliser bracing (the structural supports for the tailplane).\n\n**Who it affects**\n\nOnly applies to:\n*   **Model:** Pitts S-2A\n*   **Serial numbers:** 2001 through 2022\n\n**What you must do**\n\nCarry out the modification exactly as described in *Pitts Service Bulletin No. 4*. The work must be completed within 100 hours of flight time (time in service) after 31 August 1973.\n\n**Why it matters**\n\nThis addresses a safety-critical structural issue. The modification prevents potential failure of the tailplane bracing attachments, which could lead to loss of aircraft control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification","history":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification/history","analysis":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification/analysis","conflicts":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification/conflicts","importantCases":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification/important-cases","documents":"/api/acts/ad-pitts-s-2-3-horizontal-stabiliser-bracing-attachment-modification/documents"}}