{"id":"F2006B05425","name":"AD/PA-22/21 - Landing Gear Fairing - Modification","slug":"ad-pa-22-21-landing-gear-fairing-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46111,"registerId":"commonwealth-F2006B05425-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-22/21 - Landing Gear Fairing - 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-22 (Tri-Pacer and Colt) Series Aeroplanes\n\n \n\nAD/PA-22/21 Landing Gear Fairing - Modification 5/63\n\nApplicability: All models.\n\n \n\nRequirement: Modify the fabric fairing of the main landing gear by removing the lower 3 inches.\n\n \n\nReseal the shortened fairing and provide adequate drainage. Inspect the lower welded area for corrosion and cracking.\n\n \n\nCompliance: Before 5 July 1963.\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":2001},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This remains a targeted technical safety directive for a specific aircraft type (Piper PA-22) and has not expanded beyond its original purpose of mandating a specific landing gear modification."},"complexity_factors":["Single page document with no cross-references to other legislation","No defined terms or interpretation section","Simple imperative requirements using plain language","Single, unqualified applicability criterion (\"All models\")","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (a mandatory safety order) issued by the Civil Aviation Safety Authority for owners and operators of Piper PA-22 \"Tri-Pacer\" and \"Colt\" aeroplanes.\n\n**What it requires:** Owners must modify the fabric covering (**fairing**) around the main landing gear by removing the bottom 3 inches (approximately 7.6 cm). After this modification, they must:\n- Reseal the shortened fabric covering\n- Ensure adequate drainage to prevent water buildup\n- Inspect the lower welded areas of the landing gear for corrosion and cracking\n\n**Why it matters:** This prevents moisture and debris from becoming trapped inside the landing gear fairing, which could cause rust or structural cracks in the welded joints — a potential safety hazard.\n\n**Who it affects:** All models of the PA-22 series. The directive specified compliance before 5 July 1963."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification","history":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification/history","analysis":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification/analysis","conflicts":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification/conflicts","importantCases":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification/important-cases","documents":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification/documents"}}