{"id":"F2006B04752","name":"AD/BN-2/41 Amdt 1 - Elevator and Flap Control Rods - Inspection","slug":"ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44516,"registerId":"commonwealth-F2006B04752-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/41 Amdt 1 - Elevator and Flap Control Rods - 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-2/41\n\nAmdt 1\n\n\nElevator and Flap Control Rods - Inspection NK\n\n \n\nApplicability: All models.\n\n \n\nRequirement: 1. Inspect elevator and flap control rods for corrosion and rectify in accordance with Britten Norman SB No. BN-2/SB.101.\n\n \n\n2.    Bonding clips and leads may be removed completely provided that:\n\n \n\n(a)     Radio system still performs satisfactorily; and\n\n \n\n(b)     Control rod fork end bearings are of all metal construction.\n\n \n\nNote: If bearings are fitted with “plastic” inserts it will be necessary for the bonding clips and leads to be replaced.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1977.\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":true,"description":"The instrument is labelled 'Amdt 1', indicating it amends a prior directive. The text of this amendment requires inspection and rectification per Britten Norman SB No. BN-2/SB.101, permits conditional removal of bonding clips and leads if radio performance and all-metal bearings are confirmed, and fixes a compliance window of within 100 hours time in service after 31 October 1977 (Requirement 1–2; Note; Compliance)."},"complexity_factors":["Narrow, specific technical scope limited to elevator and flap control rods (Applicability; Requirement 1)","Single, short compliance deadline (Compliance: within 100 hours after 31 October 1977)","Reference to an external document (Britten Norman SB No. BN-2/SB.101) for repair procedures (Requirement 1)","A conditional allowance to remove bonding clips dependent on verifiable technical checks (Requirement 2(a)–(b))","A straightforward exception rule requiring replacement where bearings have plastic inserts (Note)"],"plain_english_summary":"This AD requires owners/operators of all Pilatus Britten‑Norman BN‑2 series aeroplanes to inspect elevator and flap control rods for corrosion and repair them per Britten Norman Service Bulletin BN‑2/SB.101, within 100 flight hours after 31 Oct 1977. Operators may remove bonding clips/leads only if the aircraft radio still performs satisfactorily and the control‑rod fork bearings are entirely metal; if bearings have plastic inserts, the bonding clips must be replaced. Costs and work fall to owners/operators and their maintenance organisations."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward safety directive focused on a specific mechanical inspection for a specific aircraft type. It has not expanded beyond its original purpose of ensuring control rod integrity."},"complexity_factors":["Very short document (under 200 words)","Only 2 main requirements with a single nested condition (2(a) and 2(b))","One defined reference (Britten Norman SB No. BN-2/SB.101 — external technical document)","Simple compliance deadline (100 hours time in service after fixed date)","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Single applicability clause with no exceptions or exemptions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of **Pilatus Britten-Norman BN-2 series aeroplanes** (a type of small twin-engine aircraft commonly used for regional transport and island hopping) to inspect the elevator and flap control rods for corrosion.\n\n**Why it matters:**\nCorroded control rods can fail, causing pilots to lose control of the aircraft's pitch (elevator) or flaps (used for takeoff and landing). This directive prevents catastrophic accidents by catching corrosion before it causes structural failure.\n\n**What must be done:**\n- **Inspect** the elevator and flap control rods for corrosion\n- **Fix any problems** found by following the manufacturer's Service Bulletin (SB No. BN-2/SB.101) — a technical repair notice from the plane maker\n- **Complete by:** Within 100 hours of flying time after 31 October 1977\n\n**Special rule about bonding clips:**\nThe directive also allows removal of electrical bonding clips and leads (which normally prevent static buildup) **only if** two conditions are met:\n- The aircraft's radio still works properly without them; AND\n- The control rod bearings are all-metal (no plastic parts)\n\nIf the bearings have plastic inserts, the bonding clips must stay or be replaced."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection","history":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection/history","analysis":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection/analysis","conflicts":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection/conflicts","importantCases":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection/important-cases","documents":"/api/acts/ad-bn-2-41-amdt-1-elevator-and-flap-control-rods-inspection/documents"}}