{"id":"F2006B05345","name":"AD/P68/18 - Oil Cooler Elbow Fitting - Replacement","slug":"ad-p68-18-oil-cooler-elbow-fitting-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45849,"registerId":"commonwealth-F2006B05345-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/18 - Oil Cooler Elbow Fitting - 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)  Partenavia P68 Series Aeroplanes\n\n \n\nAD/P68/18 Oil Cooler Elbow Fitting - Replacement 12/79\n\nApplicability: All models P68 and P68B with S/Nos. 182 and below, except 74, 89, 133, 142, 155,\n\n163 and 171.\n\n \n\nRequirement: Replace the oil cooler left hand elbow fitting P/N AN822-6-6D in accordance with page No. 3 of Partenavia SB No. 45.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1979.\n\n \n\nBackground:  In order to reduce strain on hose and fitting the oil cooler left hand elbow is replaced with an elbow of a more suitable angle.\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 directive does not indicate a change in scope from its original technical objective. It applies only to the specified P68/P68B serial-number range (with listed exceptions), requires a single replacement action following Partenavia SB No. 45, and sets a fixed compliance window. No text in the instrument suggests an expansion or narrowing of the applicability beyond those listed serial numbers or of the required action."},"complexity_factors":["Narrow applicability: single aircraft family and limited serial-number range (Applicability).","Single, discrete technical action: replace a specific part per a Service Bulletin (Requirement).","Clear, short compliance window with a concrete time metric (100 hours TIS after 31/12/1979) (Compliance).","Procedural detail deferred to an external Service Bulletin rather than contained in the directive itself (Requirement).","Few contingent provisions or exceptions (only explicit serial-number exclusions listed under Applicability)."],"plain_english_summary":"This directive mandates replacing a specific oil‑cooler left‑hand elbow fitting (AN822‑6‑6D) on certain Partenavia P68/P68B aeroplanes (serials up to 182, with listed exclusions) with an elbow of a different angle per Partenavia Service Bulletin No. 45, to be completed within 100 hours TIS after 31 Dec 1979. \n\nIt affects owners, operators, maintenance organisations and parts suppliers; operators bear parts and labour costs. The change is intended to reduce strain on the hose and fitting."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating a single part replacement."},"complexity_factors":["Single, specific mechanical requirement with no conditional logic","Clear applicability list (serial number ranges with explicit exceptions)","No defined terms section or interpretive provisions","Single compliance deadline with straightforward calculation method","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Background explanation provided in plain language"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of specific Partenavia P68 aircraft to replace a particular oil cooler elbow fitting (part number AN822-6-6D) with a redesigned version.\n\n**Who it affects:**\nOwners and operators of Partenavia P68 and P68B aircraft with **serial numbers 182 and below**, except those specifically excluded (serial numbers 74, 89, 133, 142, 155, 163, and 171).\n\n**Why it matters:**\nThe original elbow fitting was putting too much strain on connected hoses. The replacement fitting has a better angle to reduce mechanical stress and prevent potential oil leaks or engine damage.\n\n**What must be done:**\n- Replace the left-hand oil cooler elbow fitting following Partenavia Service Bulletin No. 45 (page 3)\n- Complete this work within **100 hours of flight time** after 31 December 1979\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding safety requirements. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement","history":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement/history","analysis":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement/analysis","conflicts":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement/conflicts","importantCases":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement/important-cases","documents":"/api/acts/ad-p68-18-oil-cooler-elbow-fitting-replacement/documents"}}