{"id":"F2006B04744","name":"AD/BN-2/32 - Pilots Seat Locking Mechanism - Inspection and Modification","slug":"ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44508,"registerId":"commonwealth-F2006B04744-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/32 - Pilots Seat Locking Mechanism - Inspection and 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)  Pilatus Britten-Norman BN-2 Series Aeroplanes\n\n \n\nAD/BN-2/32 Pilot’s Seat Locking Mechanism - Inspection\n\nand Modification\n\n\n7/74\n\n \n\nApplicability: All models.\n\n \n\nDocument: Britten Norman SB No. BN-2/SB.71 Issue 2.\n\n \n\nCompliance: Inspect before 22 July 1974. Modify as required in accordance with SB No. BN- 2/SB.71 Issue 2.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical Airworthiness Directive from 1974 (as indicated by '7/74' and the compliance date of 22 July 1974). It remains a discrete, targeted safety order focused solely on the specific mechanical defect in the pilot's seat locking mechanism. There is no evidence of scope creep; it has not expanded beyond its original purpose of mandating inspection and modification of this specific component."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 4 operative provisions: applicability, reference document, compliance deadline, and required action","No defined terms section","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Single condition (compliance deadline) with no nested exceptions","References only one external technical document (the Service Bulletin)"],"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) that requires specific action on aircraft.\n\n**What it does:** It orders owners and operators of **Pilatus Britten-Norman BN-2 series aeroplanes** (commonly known as Islander aircraft) to inspect and fix a problem with the **pilot's seat locking mechanism**.\n\n**Who must comply:** Anyone who owns or operates any model of the BN-2 aircraft.\n\n**What must be done:**\n- **Inspect** the pilot's seat locking mechanism before 22 July 1974\n- **Modify** the mechanism as needed, following the instructions in **Service Bulletin BN-2/SB.71 Issue 2** (a technical document from the manufacturer)\n\n**Why it matters:** A faulty seat locking mechanism could allow the pilot's seat to move unexpectedly during flight — a serious safety risk that could affect aircraft control. This directive ensures the problem is found and fixed before it causes an accident.\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding, and aircraft cannot be flown legally if they don't comply (unless specifically exempted)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD, as provided, sets its scope clearly: it applies to all Pilatus Britten‑Norman BN‑2 models and mandates inspection before a specific date with modification as required in the referenced service bulletin. The text contains no indication the scope was altered from an earlier version or that it changes the original applicability; it simply prescribes inspection and modification per the stated SB and deadline."},"complexity_factors":["Single, short directive with one clear action (inspect) and a follow‑up (modify if required).","Fixed compliance deadline specified (inspect before 22 July 1974).","Applicability covers all models of the BN‑2 series (broad applicability but simple scope).","Technical detail is delegated to an external document (Britten Norman SB No. BN‑2/SB.71 Issue 2), increasing operational steps to obtain and follow that SB.","No staged inspections, repetitive intervals, or alternative compliance routes set out in the AD text itself."],"plain_english_summary":"CASA requires owners/operators of all Pilatus Britten‑Norman BN‑2 series aeroplanes to inspect—and, if required by Britten Norman SB No. BN‑2/SB.71 Issue 2, modify—the pilot’s seat locking mechanism. Inspection must be completed before 22 July 1974; technical steps are in the referenced service bulletin. Compliance costs and any aircraft downtime are borne by owners/operators, with CASA enforcing the requirement under Part 39."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification","history":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification/history","analysis":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification/analysis","conflicts":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification/important-cases","documents":"/api/acts/ad-bn-2-32-pilots-seat-locking-mechanism-inspection-and-modification/documents"}}