{"id":"F2006B04735","name":"AD/BN-2/24 Amdt 1 - Flap Attachments and Flap Operating Lever - Inspection","slug":"ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44499,"registerId":"commonwealth-F2006B04735-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/24 Amdt 1 - Flap Attachments and Flap Operating Lever - Inspection","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-2/24\n\nAmdt 1\n\n\nFlap Attachments and Flap Operating Lever - Inspection\n\n\n3/73\n\n \n\nApplicability: All models not incorporating Britten Norman Mod. NB/M/417. Document:  Britten Norman SB No. BN-2/SB.36 Issue 3.\n\nCompliance: Within 100 hours time in service after 30 March 1973 unless already accomplished.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text provided is a single amendment label (Amdt 1) but contains only the applicability, the referenced service bulletin, and the compliance deadline. The document itself does not state any change in scope compared with an earlier version of the directive or original intent. Based solely on the text supplied, there is no explicit indication that the AD’s substantive scope (who is covered and what inspection is required) has been broadened or narrowed relative to any prior instrument."},"complexity_factors":["Narrow technical scope limited to flap attachments and flap operating lever","Single, one‑off compliance action with a clear deadline (100 hours after 30 March 1973)","Explicit exclusion based on incorporation of a specific manufacturer modification (NB/M/417)","Dependence on an external document (Britten Norman SB No. BN‑2/SB.36 Issue 3) for procedural detail","No multilayered certification, reporting, or phased implementation requirements in the text"],"plain_english_summary":"This AD requires owners/operators of Pilatus Britten‑Norman BN‑2 series aeroplanes (unless they have Mod NB/M/417) to have the flap attachments and flap operating lever inspected per Britten Norman SB No. BN‑2/SB.36 Issue 3. Compliance is mandatory under the Civil Aviation Safety Authority and must be completed within 100 hours time‑in‑service after 30 March 1973 (unless already done), with costs and downtime borne by the aircraft owner/operator."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused specifically on flap inspection requirements for one aircraft series. It has not expanded beyond its original purpose of addressing a known airworthiness concern with BN-2 flap mechanisms."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — all language is plain operational English","Single, unambiguous compliance requirement (100 hours time in service)","No nested exceptions or conditional logic — only one exemption (aircraft already modified per Mod. NB/M/417)","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998 citation","Relies entirely on external technical document (Service Bulletin) for actual inspection procedures"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for **Pilatus Britten-Norman BN-2 series aircraft** (small twin-engine planes commonly used for regional transport and island hopping).\n\n**What it requires:**\n- **Inspection of flap attachments and the flap operating lever** — these are the mechanical parts that control the flaps (the movable surfaces on the wings that help planes slow down and land safely).\n- **Who must comply:** All BN-2 models that haven't already been modified with a specific factory upgrade called \"Britten Norman Mod. NB/M/417\".\n- **When:** Within 100 hours of flying time after 30 March 1973, unless the inspection was already done.\n- **Technical reference:** Operators must follow the procedures in **Britten Norman Service Bulletin BN-2/SB.36 Issue 3** (the manufacturer's official maintenance instructions).\n\n**Why it matters:**\nFlap failures can be catastrophic — if flaps don't extend or retract properly, a plane can't slow down enough to land safely. This AD was issued to catch potential structural problems in the flap mechanism before they cause accidents. It's a preventive safety measure that makes flying in these aircraft safer for passengers and crew."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection","history":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection/history","analysis":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection/analysis","conflicts":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection/conflicts","importantCases":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection/important-cases","documents":"/api/acts/ad-bn-2-24-amdt-1-flap-attachments-and-flap-operating-lever-inspection/documents"}}