{"id":"F2006B04766","name":"AD/BN-2/54 - Pilots Switch Panel","slug":"ad-bn-2-54-pilots-switch-panel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44530,"registerId":"commonwealth-F2006B04766-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/54 - Pilots Switch Panel","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)  Pilatus Britten-Norman BN-2 Series Aeroplanes\n\n \n\nAD/BN-2/54 Pilots Switch Panel 9/91\n\nApplicability: All models BN2 Islander, 2T Turbine Islander Series Aircraft.\n\n \n\nRequirement: Action in accordance with the Technical Requirements of Pilatus Britten-Norman SB BN-2/SB.202.\n\n \n\nNote: Compliance with this SB is classified Mandatory by the UK CAA.\n\n \n\nCompliance: Prior to 5 November 1991.\n\n \n\nBackground:  Investigation has revealed the possibility of an electrical short circuit accidentally occurring between adjacent switches behind the pilots switch panel.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD's scope as presented is consistent with its stated purpose: it applies to all BN2 and 2T Islander models and requires operators to perform the technical work in Service Bulletin BN‑2/SB.202 to address a risk of electrical short‑circuit behind the pilot's switch panel. The source contains no indication that the AD's scope has been altered from that intent."},"complexity_factors":["Narrow applicability limited to BN‑2 Islander and 2T Turbine Islander models (Applicability)","Technical steps are not reproduced in the AD; compliance requires consulting an external manufacturer Service Bulletin (Requirement)","Fixed compliance deadline creates scheduling pressure for operators (Compliance)","Reference to UK CAA mandatory classification adds an external regulatory cross‑reference (Note)","AD text is short and prescriptive rather than procedurally complex (entire document)"],"plain_english_summary":"This AD requires all Pilatus Britten‑Norman BN‑2 Islander and 2T Turbine Islander operators to carry out the technical work in Service Bulletin BN‑2/SB.202 by 5 November 1991 to inspect and modify switches behind the pilot’s panel and reduce a risk of electrical short circuits.\n\nOwners/operators bear the labour, parts and downtime costs; compliance is mandatory under national airworthiness oversight."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific technical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a wiring safety fix."},"complexity_factors":["Very short document (under 200 words)","Only 1 defined applicability (aircraft models)","Single requirement referencing an external technical document (the Service Bulletin)","No nested conditions, exceptions, or cross-references to other legislation","Clear compliance date with no alternative methods or conditional timelines","Background explanation is straightforward and non-technical"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1988.\n\n**What it does:** It requires owners and operators of **Pilatus Britten-Norman BN-2 Islander aircraft** (including the turbine-powered 2T version) to carry out specific electrical safety work on the pilot's switch panel.\n\n**The safety problem:** Investigations found that electrical wires behind the pilot's switch panel could touch each other and cause a **short circuit** — an electrical fault that can cause fires, equipment failure, or loss of critical flight systems.\n\n**What must be done:** Aircraft operators must follow the technical instructions in **Service Bulletin BN-2/SB.202** issued by the manufacturer (Pilatus Britten-Norman). The UK aviation regulator has already classified this fix as mandatory, and Australia is matching that requirement.\n\n**Who it affects:** Anyone who owns, operates, or maintains BN-2 Islander aircraft in Australia.\n\n**Deadline:** The work had to be completed **before 5 November 1991**.\n\n**Why it matters:** Electrical short circuits in flight can disable essential systems or start fires. This directive prevents that by ensuring proper insulation or spacing of switches behind the panel."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-54-pilots-switch-panel","history":"/api/acts/ad-bn-2-54-pilots-switch-panel/history","analysis":"/api/acts/ad-bn-2-54-pilots-switch-panel/analysis","conflicts":"/api/acts/ad-bn-2-54-pilots-switch-panel/conflicts","importantCases":"/api/acts/ad-bn-2-54-pilots-switch-panel/important-cases","documents":"/api/acts/ad-bn-2-54-pilots-switch-panel/documents"}}