{"id":"F2006B05958","name":"AD/PA-38/2 - Aft Fuselage/Tailcone Area - Modification","slug":"ad-pa-38-2-aft-fuselage-tailcone-area-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136122,"registerId":"commonwealth-F2006B05958-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-38/2 - Aft Fuselage/Tailcone Area - 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)  Piper PA-38 (Tomahawk) Series Aeroplanes\n\n \n\nAD/PA-38/2 Aft Fuselage/Tailcone Area - Modification 8/78\n\nApplicability: All models PA-38-112 with S/Nos. as referenced in SB No. 600A. Document:  Piper SB No. 600A.\n\nCompliance: Before certification.\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 \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1683},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope: mandating a specific structural modification to the aft fuselage/tailcone of Piper PA-38-112 aircraft serial numbers referenced in SB 600A. There is no evidence of expansion beyond the initial safety modification requirement."},"complexity_factors":["Extremely brief regulatory text (approximately 30 words of substance)","Single cross-reference to external technical document (Piper SB No. 600A) containing actual modification instructions","Simple applicability test based solely on aircraft model and serial number","No defined terms, conditional logic, exceptions, or penalty provisions"],"plain_english_summary":"**What this does:** This is a safety directive requiring a structural modification to the rear fuselage (the tail section) of specific Piper Tomahawk aircraft before they can be certified as airworthy.\n\n**Who it affects:** Owners and operators of Piper PA-38-112 Tomahawk aeroplanes with serial numbers listed in Piper Service Bulletin No. 600A.\n\n**What you must do:** Before the aircraft can be certified (legally approved to fly), you must carry out the modification described in the manufacturer's Service Bulletin No. 600A. This bulletin contains the technical instructions for fixing a problem in the aft fuselage/tailcone area.\n\n**Why it matters:** This addresses a potential structural safety issue in the tail section of these specific aircraft to ensure they remain safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification","history":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification/history","analysis":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification/analysis","conflicts":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification/conflicts","importantCases":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification/important-cases","documents":"/api/acts/ad-pa-38-2-aft-fuselage-tailcone-area-modification/documents"}}