{"id":"F2006B11442","name":"AD/P166/14 - Nose Landing Gear Shock Absorber Mount Sleeves - Replacement","slug":"ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57381,"registerId":"commonwealth-F2006B11442-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P166/14 - Nose Landing Gear Shock Absorber Mount Sleeves - Replacement","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)  Piaggio P166 Series Aeroplanes\n\n \n\nAD/P166/14 Nose Landing Gear Shock Absorber\n\nMount Sleeves - Replacement\n\nApplicability: S/Nos. 341 to 364. Document:  Piaggio SB P166-8. Compliance:  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\n\n11/61\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 model range. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — all language is plain technical aviation terminology","Single, unambiguous compliance requirement ('Forthwith') with no conditional logic","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple applicability test (serial number range) with no exceptions or exemptions stated","References only one external technical document (Piaggio SB P166-8)"],"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) under the Civil Aviation Regulations 1998.\n\n**What it requires:** Owners and operators of specific Piaggio P166 series aeroplanes (serial numbers 341 to 364) must **immediately replace the nose landing gear shock absorber mount sleeves**. This is a critical safety fix — \"forthwith\" means do it now, not later.\n\n**Who it affects:** Anyone who owns, operates, or maintains the affected Piaggio P166 aircraft (a twin-engine utility aircraft). Specifically, only aircraft with serial numbers between 341 and 364 are covered.\n\n**Why it matters:** The shock absorber mount sleeves are structural components that help the nose landing gear absorb impact during landing. If these parts fail, the nose gear could collapse, causing loss of control, injury, or death. This AD forces immediate action to prevent accidents.\n\n**How to comply:** Follow the instructions in **Piaggio Service Bulletin P166-8** (the technical document referenced). This tells mechanics exactly how to do the replacement.\n\n**Key takeaway:** If you fly or maintain one of these specific Piaggio P166 aircraft, you cannot legally operate it until this sleeve replacement is done."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a specific and limited scope: replacement of nose landing gear shock absorber mount sleeves on Piaggio P166 aeroplanes with serial numbers 341–364, to be carried out in accordance with Piaggio SB P166-8 and completed \"forthwith\" (Applicability; Document; Compliance). There is no indication in the provided text that the scope has been altered from an earlier intent or version; the directive as presented is self-contained and defines its own scope."},"complexity_factors":["Very narrow applicability (specific serial numbers: S/Nos. 341 to 364) — reduces legal complexity but focuses impact (Applicability).","Reference to an external technical document (Piaggio SB P166-8) — requires obtaining and following an external service bulletin for the technical procedure (Document).","Immediate compliance required (\"Forthwith\") — creates operational urgency and scheduling constraints (Compliance).","Technical nature of the required work — replacement must be performed by competent maintenance personnel, introducing practical (not legal) complexity.","Minimal text and absence of stated rationale or mitigation measures — increases uncertainty about costs, timelines and whether alternatives are permitted (no rationale or exemptions in the supplied text).","Regulatory enforcement context (issued under CASA/Civil Aviation Regulations Part 39) — the AD is mandatory within that regulatory framework (header)."],"plain_english_summary":"This AD mandates immediate replacement of the nose landing gear shock absorber mount sleeves on Piaggio P166 aircraft serial numbers 341–364, to be carried out following Piaggio SB P166-8. It affects owners/operators and maintenance organisations for those specific aircraft and matters because compliance is mandatory and immediate, requiring operators to arrange and fund the work and any associated downtime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement","history":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement/history","analysis":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement/analysis","conflicts":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement/conflicts","importantCases":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement/important-cases","documents":"/api/acts/ad-p166-14-nose-landing-gear-shock-absorber-mount-sleeves-replacement/documents"}}