{"id":"F2006B05942","name":"AD/PA-36/4 - Flap Control - Modification","slug":"ad-pa-36-4-flap-control-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136079,"registerId":"commonwealth-F2006B05942-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-36/4 - Flap Control - 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-36/4 Flap Control - Modification 2/75\n\nApplicability: Model PA-36-285 with S/Nos. 36-7360001 to 36-7460026 and 36-7460034. Document:               Piper SB No. 439.\n\nCompliance: Within 100 hours time in service after 31 January 1975.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n \n\n![](image.001.png)  \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1459},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted, technical safety directive focused on a specific mechanical issue (flap controls) on specific aircraft. There is no indication of scope expansion beyond the original safety purpose."},"complexity_factors":["Extremely short text with no interpretation section","Single, specific applicability criterion (specific model and serial number ranges)","Only one compliance requirement with a clear technical reference (Piper SB No. 439)","No defined terms, exceptions, or conditional logic","Simple time-based compliance deadline"],"plain_english_summary":"**What this is:** A mandatory safety order (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) for specific agricultural aircraft.\n\n**Who it affects:** Owners and operators of **Piper PA-36-285 (Pawnee Brave)** aeroplanes with serial numbers between 36-7360001 to 36-7460026 and 36-7460034.\n\n**What it requires:** You must modify the aircraft's **flap control system** (the mechanism that controls the flaps on the wings) following the instructions in **Piper Service Bulletin No. 439**.\n\n**When:** This modification must be completed within **100 hours of flight time** after 31 January 1975.\n\n**Why it matters:** Airworthiness Directives are legally binding safety requirements. If you don't comply, the aircraft is not considered airworthy and cannot legally fly. This specific directive addresses a safety issue with the flap controls on these particular aircraft models."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-4-flap-control-modification","history":"/api/acts/ad-pa-36-4-flap-control-modification/history","analysis":"/api/acts/ad-pa-36-4-flap-control-modification/analysis","conflicts":"/api/acts/ad-pa-36-4-flap-control-modification/conflicts","importantCases":"/api/acts/ad-pa-36-4-flap-control-modification/important-cases","documents":"/api/acts/ad-pa-36-4-flap-control-modification/documents"}}