{"id":"F2006B07490","name":"AD/TSA-600/25 Amdt 1 - Aft Horizontal/Vertical Stabiliser Attach Fitting - Inspection","slug":"ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49940,"registerId":"commonwealth-F2006B07490-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TSA-600/25 Amdt 1 - Aft Horizontal/Vertical Stabiliser Attach Fitting - Inspection","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)  Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes\n\n \n\nAD/TSA-600/25\n\nAmdt 1\n\n\nAft Horizontal/Vertical Stabiliser Attach Fitting - Inspection\n\n\n12/80\n\n \n\nApplicability: All models 600, 601 and 601P with S/Nos. 0001 to 0807. Document:  Piper SB No. SB600-88A.\n\nCompliance: Inspect at intervals not exceeding 200 hours time in service.\n\n \n\nNote: Modification in accordance with Part II of SB 600-88A does not relieve inspection requirement.\n\n \n\nBackground: Reports have been received by the manufacturer of cracks developing along the upper and lower flanges of the aft spar fittings for the horizontal and vertical stabilisers.\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":1259},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive, maintaining the original scope of mandating recurring structural inspections for specific aircraft models. The amendment does not appear to expand beyond the original safety intent."},"complexity_factors":["Single operative provision with straightforward compliance requirement","No defined terms section or legislative cross-references","Limited applicability criteria (specific models and serial numbers only)","Simple conditional logic (inspection interval not exceeding 200 hours)"],"plain_english_summary":"This directive mandates **mandatory safety inspections** for specific Piper Aerostar aircraft (models 600, 601, and 601P with serial numbers 0001 to 0807).\n\n**What it requires:**\n- Owners and operators must inspect the **aft (rear) attachment fittings** for the horizontal and vertical stabilisers (the tail fins that keep the plane stable) at least every 200 hours of flight time.\n- This is because the manufacturer has reported **cracks developing** in these critical structural components.\n\n**Important caveat:**\n- Even if the aircraft has been modified according to the manufacturer's Service Bulletin 600-88A Part II, the inspection requirement still applies.\n\n**Who it affects:** Owners and operators of the specified Aerostar aircraft models."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection","history":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection/history","analysis":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection/analysis","conflicts":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection/conflicts","importantCases":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection/important-cases","documents":"/api/acts/ad-tsa-600-25-amdt-1-aft-horizontal-vertical-stabiliser-attach-fitting-inspection/documents"}}