{"id":"F2006B05571","name":"AD/PA-25/35 Amdt 2 - Modification - Placard and Spray Equipment","slug":"ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46575,"registerId":"commonwealth-F2006B05571-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-25/35 Amdt 2 - Modification - Placard and Spray Equipment","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-25 (Pawnee) Series Aeroplanes\n\nAD/PA-25/35\n\nAmdt 2\n\n  \nModification \\- Placard and Spray Equipment 4/84\n\nApplicability: All models PA-25, PA-25-235 and PA-25-260. Requirement: Unless already accomplished,\n\n    Install a “No smoking” placard on the instrument panel.\n\n    2. Modify or relocate the spray boom pressure gauge and its associated plumbing to prevent the release of spray liquid or vapour into the pilots compartment.\n\n    3. Install a non-return valve at the hopper end of the spray pressure filling system. Compliance: Before issue of an Australian Certificate of Airworthiness.\n\nBackground: The modifications to the spray system are required to prevent spray or spray vapour collecting in the pilots compartment area. This amendment raised to allow operators to propose alternate means of modifying the spray boom pressure gauge and its plumbing.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1627},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment expands the original directive's scope by allowing operators to propose 'alternate means' of modifying the spray boom pressure gauge and plumbing. The original likely mandated a specific modification method, whereas this version permits alternative compliance pathways."},"complexity_factors":["Three discrete, numbered technical mandates with no nested exceptions or conditional logic","Limited applicability to three specific aircraft models only","Single compliance trigger (before Certificate of Airworthiness) with no staggered deadlines","No interpretation section or defined terms requiring cross-reference","Plain language requirements using common aviation terminology"],"plain_english_summary":"This safety directive requires owners/operators of Piper PA-25 Pawnee agricultural aircraft in Australia to complete three mandated modifications before the aircraft is certified airworthy: install a \"No smoking\" placard, ensure the spray boom pressure gauge and hoses are altered or repositioned so spray liquid or fumes cannot enter the cockpit, and fit a one-way (non-return) valve at the hopper fill system. It reduces pilot exposure to toxic chemicals and fire risk, and now allows operators to propose alternative methods for relocating the gauge."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment","history":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment/history","analysis":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment/analysis","conflicts":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment/conflicts","importantCases":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment/important-cases","documents":"/api/acts/ad-pa-25-35-amdt-2-modification-placard-and-spray-equipment/documents"}}