{"id":"F2006B10693","name":"AD/HU 369/31 Amdt 2 - Overrunning Clutch Assembly - Rework and Inspection","slug":"ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116650,"registerId":"commonwealth-F2006B10693-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/31 Amdt 2 - Overrunning Clutch Assembly - Rework and Inspection","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)  McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\n \n\nAD/HU 369/31\n\nAmdt 2\n\n\nOverrunning Clutch Assembly - Rework and Inspection\n\n\n2/79\n\n \n\nApplicability: Models 369D, MD, H, HE, HM and HS.\n\n \n\nDocument: For models 369D and MD: Hughes SIN No. DN-9.2.\n\n \n\nFor models 369H, HE, HM and HS: Hughes SIN No. HN-118.2.\n\n \n\nCompliance: As detailed in the requirement document.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive maintaining its original purpose: mandating specific maintenance actions for airworthiness. Amendment 2 suggests minor updates to an existing directive, not scope creep."},"complexity_factors":["Very short document (approximately 200 words)","No defined terms section — relies entirely on external technical documents (Hughes SIN No. DN-9.2 and HN-118.2)","Simple structure: applicability, document reference, compliance statement","No conditional logic or nested exceptions within the directive text itself","Cross-references are limited to two external service bulletins, not to other legislation"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific models of McDonnell Douglas (Hughes) and Kawasaki 369 series helicopters.\n\n**What it does:**\n- Requires owners and operators of these helicopters to perform specific **rework and inspection** work on the **overrunning clutch assembly** — a critical component that allows the helicopter's rotor to continue spinning if the engine fails (called \"autorotation\").\n- The directive references two technical service documents (Service Information Notices) that detail exactly what work must be done.\n\n**Who it affects:**\n- Owners and operators of Hughes/Kawasaki helicopter models: 369D, MD, H, HE, HM, and HS.\n- Maintenance engineers who work on these aircraft.\n\n**Why it matters:**\n- The overrunning clutch is essential for safety. If it fails, the pilot may not be able to safely land the helicopter during an engine failure.\n- This directive ensures a known defect or wear issue is addressed before it causes an accident.\n- Compliance is **mandatory** — you cannot legally fly these helicopters without completing the required work."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"The instrument is titled as Amendment 2 to AD/HU 369/31, which indicates it alters an earlier version of this airworthiness directive. The text supplied sets applicability for Models 369D, MD, H, HE, HM and HS and delegates technical requirements to Hughes Service Instruction DN-9.2 (for 369D and MD) and HN-118.2 (for 369H, HE, HM and HS) (Applicability; Document; Compliance). The supplied text does not include the original AD wording, the earlier amendment(s) or a comparison of prior scope, so the exact nature of the change(s) (what was added, removed or reworded) cannot be determined from this document alone. To identify precise scope changes, the original AD/HU 369/31 and Amendment 1 should be compared with this Amendment 2."},"complexity_factors":["The AD text is short and largely procedural but delegates all technical detail to external documents (Hughes SIN DN-9.2 and HN-118.2), increasing practical complexity because compliance depends on those documents (Document; Compliance).","Multiple helicopter models are covered (369D, MD, H, HE, HM, HS), requiring operators to determine model-specific applicability and procedures (Applicability; Document).","The AD does not include timelines, inspection intervals, or explicit acceptance criteria in the text supplied; those are in the requirement documents, so administrators and maintainers must consult and interpret external material (Compliance).","Technical nature of the work (overrunning clutch assembly rework/inspection) requires specialist maintenance skills and likely parts supply, adding operational complexity not specified in the AD (Document; Compliance).","Enforcement and recordkeeping obligations are implicit: operators must demonstrate compliance with the referenced instructions, which creates administrative and evidentiary requirements in practice (Applicability; Compliance)."],"plain_english_summary":"This CASA airworthiness directive mandates rework and inspection of the overrunning clutch assembly on specified McDonnell Douglas (Hughes) and Kawasaki 369‑series helicopters, requiring compliance with the manufacturer’s service instructions (Hughes SIN DN‑9.2 or HN‑118.2), to which the AD defers procedural detail.\n\nOwners and operators of the affected helicopters must arrange and pay for the work and retain compliance evidence; CASA enforces the legal obligation while maintenance organisations follow the referenced Hughes documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection","history":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection/history","analysis":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection/analysis","conflicts":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection/conflicts","importantCases":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection/important-cases","documents":"/api/acts/ad-hu-369-31-amdt-2-overrunning-clutch-assembly-rework-and-inspection/documents"}}