{"id":"F2006B11449","name":"AD/P166/22 - Nose Wheel Door Levers - Modification","slug":"ad-p166-22-nose-wheel-door-levers-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57395,"registerId":"commonwealth-F2006B11449-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P166/22 - Nose Wheel Door Levers - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 5/1963,Aircraft below 5700 kg,Piaggio P166 Series Aeroplanes,Nose Wheel Door Levers - Modification,22\ntitle: Airworthiness Directive - AD/P166/22 - Nose Wheel Door Levers - Modification\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)  Piaggio P166 Series Aeroplanes\n\n \n\nAD/P166/22 Nose Wheel Door Levers - Modification 5/63\n\nApplicability: All model P166. Document:  1. Piaggio SB P166-34; or\n\n2. RAI AD 63-58/P166-21.\n\n \n\nCompliance: Forthwith.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a clear, narrow scope: require modification of nose wheel door levers on all Piaggio P166 models, using one of two specified technical documents, with immediate effect (\"Forthwith\"). There is no indication in the supplied text that the scope has changed from an earlier or original intent."},"complexity_factors":["Short, single-action requirement (modification of nose wheel door levers) reduces procedural complexity.","Wide applicability to all model P166 increases operational reach but does not add procedural detail.","Immediate compliance timing (\"Forthwith\") raises scheduling/operational complexity for operators.","Technical details are delegated to external documents (Piaggio SB P166-34 or RAI AD 63-58/P166-21); actual on-the-job complexity depends on those documents.","No alternative compliance path or deferment mechanism specified in the supplied text increases enforcement rigidity.","Legal basis is clear (CASA under Part 39), so regulatory interpretation complexity is low."],"plain_english_summary":"This Airworthiness Directive from CASA requires immediate modification of nose‑wheel door levers on all Piaggio P166 aircraft, to be carried out per the referenced Piaggio or RAI technical documents. It affects owners/operators and the maintenance organisations that must perform the work; compliance is mandatory \"forthwith\" and costs (parts, labour, downtime) fall to operators. The measure is presented as a safety action to address a lever-related risk, with implementation timing and specifics set by the cited service/airworthiness documents."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on a mechanical modification to one aircraft type. There is no indication of scope creep; it addresses exactly what it purports to address — a specific airworthiness issue with Piaggio P166 nose wheel door levers."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 substantive requirement (modify nose wheel door levers)","No defined terms section","No cross-references to other legislation beyond the two compliance documents","Simple unconditional directive ('Forthwith') with no exceptions or conditional logic","Single applicability criterion (all model P166)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA). An Airworthiness Directive is a mandatory safety notice that tells aircraft owners and operators they must fix a specific problem with their aircraft.\n\n**What it requires:** Owners and operators of **Piaggio P166 series aeroplanes** (a type of Italian-made aircraft) must modify the **nose wheel door levers** — the mechanical parts that control the doors covering the front landing gear.\n\n**Why it matters:** The directive is marked \"Forthwith,\" meaning it must be done **immediately** without delay. This suggests a serious safety issue — likely that the nose wheel door levers could fail or malfunction, potentially causing problems with the landing gear during takeoff or landing.\n\n**Who must comply:** Anyone who owns or operates any model of the Piaggio P166 aircraft in Australia.\n\n**How to comply:** You must follow either:\n- **Piaggio Service Bulletin P166-34** (the manufacturer's official repair instructions), OR\n- **RAI AD 63-58/P166-21** (an equivalent airworthiness directive from the Italian aviation authority — RAI stands for \"Registro Aeronautico Italiano\")\n\n**The bottom line:** If you fly a Piaggio P166 in Australia, you cannot legally operate the aircraft until you have modified the nose wheel door levers according to these instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification","history":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification/history","analysis":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification/analysis","conflicts":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification/conflicts","importantCases":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification/important-cases","documents":"/api/acts/ad-p166-22-nose-wheel-door-levers-modification/documents"}}