{"id":"F2006B06477","name":"AD/R44/9 - Oil Line Elbows","slug":"ad-r44-9-oil-line-elbows","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47988,"registerId":"commonwealth-F2006B06477-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R44/9 - Oil Line Elbows","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nRobinson R44 Series Helicopters\n\nAD/R44/9 Oil Line Elbows 6/98\n\nApplicability: All R44 helicopters, serial numbers 0001 through 0330.\n\nRequirement: Remove any aluminium (blue-coloured) AN823-8D (45 degree) or MS20822-8D (90 degree) elbows that connect the A723 oil cooler lines to the engine accessory case and replace them with airworthy MS20823-8 (45 degree) steel elbows or MS20822-8 (90 degree) steel elbows, as applicable.\n\nNote: 1 FAA AD 98-05-10 Amdt 39-10371 refers.\n\nNote: 2 Robinson Helicopter Company R44 Service Bulletin SB-25, dated 01 October 1997 refers.\n\nCompliance: Unless previously carried out, within 50 hours time in service after the effective date of this Directive.\n\nThis airworthiness directive becomes effective on 21 May 1998.\n\nBackground: The manufacturer has received two reports of cracking of the aluminium elbows which connect the oil cooler lines to the engine accessory case. The helicopters experienced loss of engine oil, resulting in engine failure.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft model. The scope remains precisely limited to the identified safety issue — replacement of faulty oil line elbows — with no expansion beyond the original safety purpose."},"complexity_factors":["Very short document — approximately 150 words of substantive content","Only 2 defined part numbers explicitly referenced (AN823-8D/MS20822-8D for removal, MS20823-8/MS20822-8 for replacement)","Single, unambiguous compliance requirement with one clear exception (\"unless previously carried out\")","No cross-references to other legislation sections — only references to related FAA directive and manufacturer service bulletin as background","Simple conditional logic: applicability determined by serial number range only","No nested exceptions or layered conditions"],"plain_english_summary":"**What this is:** This is a safety order (called an \"Airworthiness Directive\") issued by Australia's Civil Aviation Safety Authority. It applies to a specific model of helicopter — the Robinson R44.\n\n**What it does:** It requires helicopter owners and operators to replace certain aluminium elbow joints in the engine oil system with stronger steel ones. These elbows are small pipe fittings that connect oil cooler lines to the engine.\n\n**Why it matters:** Two helicopters had their engines fail because these aluminium elbows cracked, causing all the engine oil to leak out. This is obviously catastrophic when you're flying. The aluminium elbows are blue-coloured and have specific part numbers (AN823-8D for 45-degree bends, MS20822-8D for 90-degree bends). They must be swapped for steel versions (MS20823-8 or MS20822-8).\n\n**Who must act:** Anyone who owns or operates an R44 helicopter with serial numbers 0001 through 0330 — that's the first 330 helicopters made.\n\n**When:** The fix must be done within 50 hours of flying time after 21 May 1998, unless it was already done.\n\n**The bottom line:** If you don't replace these parts, your helicopter could suffer catastrophic engine failure in flight due to oil loss."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope has not changed from the directive’s original intent: it targets R44 helicopters serials 0001–0330 and mandates replacement of the identified aluminium oil-line elbows with specified steel elbows within 50 hours to address reported cracking and oil-loss-related engine failures. Operators are responsible for procuring parts, performing the work, and updating maintenance records. The AD cites FAA AD 98-05-10 and Robinson SB-25 and takes effect 21 May 1998."},"complexity_factors":["Safety-critical hardware replacement (oil cooler-to-engine elbows) described in Requirement and Background","Specific parts mandated: removal of aluminium AN823-8D or MS20822-8D and installation of steel MS20823-8 or MS20822-8 (Requirement)","Limited applicability to a defined serial-number range (R44 serials 0001–0330) (Applicability)","Short compliance window: within 50 hours time in service after the effective date (Compliance)","Operational and cost burden on operators for parts, labour and scheduling (Requirement/Compliance)","References to external guidance: FAA AD 98-05-10 and Robinson Service Bulletin SB-25 (Notes)","Effective date specified (21 May 1998) which fixes the compliance timetable (Effective date)","Safety rationale based on two reports of cracking and resultant oil loss/engine failure (Background)"],"plain_english_summary":"This airworthiness directive requires owners/operators of Robinson R44 helicopters (serials 0001–0330) to remove certain aluminium oil-line elbow fittings that join the oil cooler to the engine and replace them with specified steel elbows. The change is mechanical: swap the identified aluminium elbows for the steel equivalents.\n\nOperators must complete the replacement within 50 flight hours of the directive’s effective date (21 May 1998). The measure aims to prevent oil loss and engine failure; operators bear the parts, labour and scheduling costs and must record the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r44-9-oil-line-elbows","history":"/api/acts/ad-r44-9-oil-line-elbows/history","analysis":"/api/acts/ad-r44-9-oil-line-elbows/analysis","conflicts":"/api/acts/ad-r44-9-oil-line-elbows/conflicts","importantCases":"/api/acts/ad-r44-9-oil-line-elbows/important-cases","documents":"/api/acts/ad-r44-9-oil-line-elbows/documents"}}