{"id":"F2006B04725","name":"AD/BN-2/14 Amdt 2 - Flap Operating Lever - Modification","slug":"ad-bn-2-14-amdt-2-flap-operating-lever-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44489,"registerId":"commonwealth-F2006B04725-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/14 Amdt 2 - Flap Operating Lever - 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\n# AD/BN-2/14\n\nAmdt 2\n\nApplicability: All models.\n\n# Flap Operating Lever - Modification NK\n\n \n\nDocument: Britten-Norman Modification Leaflet BN-2/NB/M/417. Compliance: Within 100 hours time in service after 30 November 1970.\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":1,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused solely on a specific mechanical modification to one aircraft type. It has not expanded beyond its original purpose of ensuring flap lever safety in BN-2 aircraft."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Single, unambiguous compliance requirement (one modification, one deadline)","No conditional logic or exceptions","Clear applicability statement ('All models')","Single technical reference document cited"],"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 aircraft owners to fix a specific safety problem.\n\n**What it does:** It orders owners and operators of **Pilatus Britten-Norman BN-2 series aeroplanes** (small twin-engine aircraft commonly used for regional transport and island hopping) to modify the **flap operating lever** — the control pilots use to extend or retract the flaps (the movable surfaces on the wings that help with takeoff and landing).\n\n**Why it matters:** Flaps are critical for safe landings and takeoffs. A faulty or poorly designed flap lever could lead to loss of control during these critical flight phases. This directive mandates a specific factory modification (detailed in \"Modification Leaflet BN-2/NB/M/417\") to prevent accidents.\n\n**Who must comply:** Anyone operating any model of BN-2 aircraft in Australia.\n\n**When:** The modification had to be completed within **100 hours of flight time** after **30 November 1970** (this is a historical directive from 1970, though it remains on the books as Amendment 2)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is labelled as Amendment 2 (Amdt 2), which indicates it modifies a pre‑existing airworthiness directive. The published text here sets applicability to all BN‑2 models, prescribes the specific modification leaflet (BN‑2/NB/M/417), and fixes a compliance window (100 hours TIS after 30 November 1970). The document does not state what the prior version required or how the scope was altered, so the precise nature of the change from the original AD cannot be determined from this text alone."},"complexity_factors":["Single, narrowly defined technical requirement (flap operating lever modification)","Applicability covers all BN‑2 models but the action is singular (reduces actor heterogeneity)","Fixed, short compliance window specified (100 hours TIS after 30 November 1970)","Normative reliance on an external technical document (Britten‑Norman Modification Leaflet BN‑2/NB/M/417) — directive lacks technical detail","No stated alternative means of compliance or tolerances in the text","Issued as an amendment (Amdt 2) but the text does not record the differences from prior text"],"plain_english_summary":"This airworthiness directive mandates modification of the flap operating lever on all Pilatus Britten‑Norman BN‑2 series aeroplanes per Britten‑Norman Modification Leaflet BN‑2/NB/M/417, to be completed within 100 hours' time‑in‑service after 30 November 1970. It obliges owners/operators to arrange the work (and bear related costs/downtime) but does not state the safety defect being corrected."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification","history":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification/history","analysis":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification/analysis","conflicts":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification/conflicts","importantCases":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification/important-cases","documents":"/api/acts/ad-bn-2-14-amdt-2-flap-operating-lever-modification/documents"}}