{"id":"F2006B05945","name":"AD/PA-36/7 - Wing Main Spar Centre Section - Modification","slug":"ad-pa-36-7-wing-main-spar-centre-section-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136087,"registerId":"commonwealth-F2006B05945-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-36/7 - Wing Main Spar Centre Section - 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-36 (Pawnee Brave) Series Aeroplanes\n\n \n\nAD/PA-36/7 Wing Main Spar Centre Section - Modification 7/75\n\nApplicability: All models with S/Nos. 36-7360002 and 36-7560004 to 36-7560055. Document:  Piper SB No. 472.\n\nCompliance: Within 10 hours time in service after 19 June 1975.\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":1909},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: mandating a specific structural modification for a defined aircraft population. It represents the standard, limited purpose of airworthiness directives."},"complexity_factors":["Extremely brief text (under 50 words of operative provisions)","Single compliance requirement with clear external reference (Piper SB No. 472)","Specific applicability limited to defined serial number ranges (no conditional logic)","No exceptions, exemptions, or alternative compliance methods stated"],"plain_english_summary":"This is a mandatory safety directive (called an Airworthiness Directive or AD) issued by the Civil Aviation Safety Authority for owners of specific Piper PA-36 Pawnee Brave agricultural aircraft.\n\n**Who it affects**\nOwners of Piper PA-36 aircraft with serial numbers **36-7360002** or those in the range **36-7560004 to 36-7560055**.\n\n**What you must do**\nModify the **wing main spar centre section** (the central structural beam that holds the wings to the fuselage) according to the technical instructions in **Piper Service Bulletin No. 472**.\n\n**When you must do it**\nWithin **10 hours of flight time** after 19 June 1975.\n\n**Why this matters**\nThis directive addresses a structural defect in the wing main spar that could lead to wing failure. Compliance is mandatory for airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification","history":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification/history","analysis":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification/analysis","conflicts":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification/conflicts","importantCases":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification/important-cases","documents":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification/documents"}}