{"id":"F2006B05696","name":"AD/PA-31/11 - Aft Facing Seats - Modification","slug":"ad-pa-31-11-aft-facing-seats-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135492,"registerId":"commonwealth-F2006B05696-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/11 - Aft Facing Seats - 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-31 Series Aeroplanes\n\n \n\nAD/PA-31/11 Aft Facing Seats - Modification 5/70\n\nApplicability: All models fitted with aft facing seats in the forward position not modified in accordance with Piper SB No. 308.\n\n \n\nDocument: Piper SB No. 308.\n\n \n\nCompliance: In accordance with the requirement document.\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":1836},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope focused solely on seat modifications for Piper PA-31 aircraft. As a discrete Airworthiness Directive addressing a specific unsafe condition, it has not expanded beyond its initial safety purpose."},"complexity_factors":["Extremely brief: only two operative provisions (applicability and compliance)","No definitions section or interpretive provisions","Single external technical reference (Piper SB No. 308) with no legislative cross-references","Binary applicability test (seats either modified or not) with no exceptions or conditional triggers"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority (CASA) requiring owners and operators of specific Piper aircraft to modify certain passenger seats.\n\n**Who it affects:** Anyone who owns or operates **Piper PA-31 series aircraft** that have **rear-facing seats** installed in the forward cabin position—unless those seats have already been modified according to the manufacturer's Service Bulletin No. 308.\n\n**What must be done:** The rear-facing seats must be modified **exactly as specified in Piper Service Bulletin No. 308**. This isn't optional—failure to comply violates civil aviation safety regulations and the aircraft cannot be operated legally without this modification.\n\n**Why it matters:** These modifications address specific safety defects in the original seat design (likely relating to structural integrity or restraint systems during turbulence or impact). Airworthiness Directives are issued only when unsafe conditions exist that could affect flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-11-aft-facing-seats-modification","history":"/api/acts/ad-pa-31-11-aft-facing-seats-modification/history","analysis":"/api/acts/ad-pa-31-11-aft-facing-seats-modification/analysis","conflicts":"/api/acts/ad-pa-31-11-aft-facing-seats-modification/conflicts","importantCases":"/api/acts/ad-pa-31-11-aft-facing-seats-modification/important-cases","documents":"/api/acts/ad-pa-31-11-aft-facing-seats-modification/documents"}}