{"id":"F2006B04724","name":"AD/BN-2/13 Amdt 1 - Rudder Bar Beams - Inspection and Modification","slug":"ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44488,"registerId":"commonwealth-F2006B04724-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/13 Amdt 1 - Rudder Bar Beams - 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-2/13\n\nAmdt 1\n\n\nRudder Bar Beams - Inspection and Modification NK\n\n \n\nApplicability: All models with S/Nos. 1-115 not incorporating Mod. No. NB/M/341. Document:  Britten-Norman SB No. BN-2/SB.20 Issue 2.\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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (serial number range and modification status)","Single cross-reference to external technical document (Britten-Norman Service Bulletin)","No conditional logic, exceptions, or nested provisions","Straightforward compliance requirement ('in accordance with the requirement document')","No interpretation section or defined terms within the instrument itself"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that requires owners and operators of specific aircraft to take action to fix a known safety problem.\n\n**What it does:** It requires inspection and modification of **rudder bar beams** (the structural components that connect the pilot's foot pedals to the aircraft's rudder system) on certain **Pilatus Britten-Norman BN-2 series aeroplanes**.\n\n**Who it affects:** \n- **Aircraft owners and operators** of BN-2 models with **serial numbers 1 through 115**\n- **Only if** the aircraft has **not** already been modified with **Modification No. NB/M/341** (a factory fix for this issue)\n\n**What must be done:**\n- Owners must follow the instructions in **Britten-Norman Service Bulletin No. BN-2/SB.20 Issue 2** — a technical document from the manufacturer detailing how to inspect and modify the rudder bar beams\n- Compliance is mandatory \"in accordance with the requirement document\" (meaning you must follow the service bulletin exactly)\n\n**Why it matters:** Rudder bar beams are critical flight controls. If they fail, the pilot cannot steer the aircraft effectively, creating a serious safety risk. This AD ensures potentially defective components are identified and fixed before they cause an accident.\n\n**Key point:** This is **Amendment 1** (Amdt 1), meaning it updates a previous version of this directive — likely clarifying requirements or expanding applicability."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is presented as \"Amdt 1\" to AD/BN‑2/13, which indicates this is an amendment to a prior AD (i.e. the instrument has been changed from an earlier version). The supplied text does not include the original AD or a redline showing what was altered, so the exact nature of the change to scope or requirements cannot be determined from the material provided. The current AD as supplied specifies applicability (S/N 1–115 not incorporating Mod NB/M/341) and delegates technical requirements to Britten‑Norman SB No. BN‑2/SB.20 Issue 2 (Document; Applicability; Compliance)."},"complexity_factors":["Narrow and clear applicability (S/N 1–115 without Mod NB/M/341) reduces scope ambiguity.","Technical detail is deferred to an external document (Britten‑Norman SB No. BN‑2/SB.20 Issue 2), which requires users to obtain and interpret that bulletin.","The AD text does not include timing, intervals, or acceptance criteria, increasing implementation reliance on the service bulletin.","Administrative task to confirm modification status (whether Mod. No. NB/M/341 is already incorporated) across affected fleet.","Potential coordination needed between operators and maintenance organisations for downtime, parts procurement and recordkeeping.","Absence of stated alternative compliance routes or approval mechanism in the supplied text increases procedural uncertainty."],"plain_english_summary":"This AD requires owners/operators of Pilatus Britten‑Norman BN‑2 aeroplanes (S/N 1–115 without Mod NB/M/341) to have rudder bar beams inspected and, if required, modified. Compliance is mandatory and must follow Britten‑Norman Service Bulletin BN‑2/SB.20 Issue 2, which contains the inspection steps, timing and acceptance criteria.\n\nOperators pay for and arrange the work; maintenance organisations must perform the tasks to the SB’s procedures. The AD delegates all technical detail to the referenced service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification","history":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification/history","analysis":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification/analysis","conflicts":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification/important-cases","documents":"/api/acts/ad-bn-2-13-amdt-1-rudder-bar-beams-inspection-and-modification/documents"}}