{"id":"F2006B05325","name":"AD/P166/31 - Main Landing Gear Retraction Jack Pivot - Modification","slug":"ad-p166-31-main-landing-gear-retraction-jack-pivot-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45784,"registerId":"commonwealth-F2006B05325-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P166/31 - Main Landing Gear Retraction Jack Pivot - 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)  Piaggio P166 Series Aeroplanes\n\n \n\nAD/P166/31 Main Landing Gear Retraction Jack Pivot - Modification\n\nApplicability: All models P166 and P166B. Document:  Piaggio SB No. 166-49.\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\n \n\n\n1/66\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document — only 1 page","No defined terms section; all language is plain operational English","Single, unambiguous compliance requirement ('forthwith')","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","No conditional logic, exceptions, or alternative compliance methods specified","Refers to external technical document (Piaggio SB 166-49) for actual modification details, but does not reproduce them"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Piaggio P166 and P166B aircraft** to modify the **main landing gear retraction jack pivot** (a mechanical part that helps the wheels fold up into the plane after takeoff).\n\n**What you must do:**\n- Follow the instructions in **Piaggio Service Bulletin No. 166-49** (the manufacturer's official repair notice)\n- Complete this modification **\"forthwith\"** — meaning immediately, without delay\n\n**Why it matters:**\nThis type of directive is issued when CASA identifies a safety defect that could affect flight safety. The landing gear system is critical — if the pivot fails, the gear might not retract or extend properly, potentially causing an accident. Compliance is **legally mandatory**; flying without completing this modification would violate civil aviation law.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains a Piaggio P166 series aircraft in Australia."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text does not include an earlier instrument or statement of an original scope against which to measure change. The AD as presented applies to all Piaggio P166 and P166B models and requires modification of the main landing gear retraction jack pivot with immediate effect, using Piaggio SB No. 166-49 for technical detail. Absent a prior directive or stated original intent in the supplied material, it is not possible to identify any change of scope from an earlier instrument."},"complexity_factors":["Narrow technical scope: single component modification (main landing gear retraction jack pivot) reduces breadth of affected systems (source: Title: Main Landing Gear Retraction Jack Pivot - Modification).","Immediate compliance requirement increases operational urgency and scheduling pressure (source: Compliance: Forthwith).","Dependence on external technical document for procedure and parts details — the AD references Piaggio SB No. 166-49 rather than embedding instructions (source: Document: Piaggio SB No. 166-49).","Applicability to all P166 and P166B airframes means the directive covers the entire fleet of those models (source: Applicability: All models P166 and P166B), which concentrates administrative action but keeps technical variability low.","Enforcement and oversight are by the national regulator (CASA), which fixes the requirement but delegates technical execution to maintenance organisations (source: header referencing Civil Aviation Safety Authority)."],"plain_english_summary":"This AD, issued by CASA, mandates an immediate mechanical modification to the main landing gear retraction jack pivot on all Piaggio P166 and P166B aircraft. Owners/operators and maintenance organisations must comply forthwith using the procedures in Piaggio Service Bulletin No. 166‑49. Operators bear the cost and should obtain the SB, schedule the work urgently, and keep compliance records."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification","history":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification/history","analysis":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification/analysis","conflicts":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification/conflicts","importantCases":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification/important-cases","documents":"/api/acts/ad-p166-31-main-landing-gear-retraction-jack-pivot-modification/documents"}}