{"id":"F2006B10622","name":"AD/HU 269/61 - Fuel Tank Sump Cap Attachment - Inspection","slug":"ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116507,"registerId":"commonwealth-F2006B10622-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/61 - Fuel Tank Sump Cap Attachment - 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)  Schweizer (Hughes) 269 Series Helicopters\n\n \n\nAD/HU 269/61 Fuel Tank Sump Cap Attachment - Inspection 12/77\n\nApplicability: All models.\n\n \n\nDocument: Hughes SIN No. N-148.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1977 and thereafter at intervals not exceeding 300 hours time in service.\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive, as provided, applies to all Hughes (Schweizer) 269 models and prescribes an initial inspection within 100 hours after 31 December 1977 and repeat inspections every 300 hours. The text contains no indication that the scope has been changed from its original specification."},"complexity_factors":["Short, narrowly focused directive requiring a single recurring inspection","Clear applicability to all models of a single helicopter series","Precise compliance timing specified (initial and recurring intervals)","Technical inspection method not contained in the text and deferred to an external Hughes SIN (N-148), requiring consultation of another document","No discretionary exemptions, alternative compliance paths, or detailed procedural rules in the text"],"plain_english_summary":"This directive mandates periodic inspection of the fuel tank sump cap attachment on all Hughes (Schweizer) 269 series helicopters to verify its condition and attachment. Operators/owners must perform an initial inspection within 100 hours time‑in‑service after 31 December 1977 and repeat inspections at intervals not exceeding 300 hours, using the inspection procedure in Hughes Service Information Notice No. N‑148. The inspections impose recurring maintenance costs and recordkeeping obligations on operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1977 addressing a specific mechanical inspection requirement. It has not expanded beyond its original purpose of ensuring fuel tank sump cap integrity."},"complexity_factors":["Very short document (under 200 words)","No defined terms section","No cross-references to other legislation beyond a single technical document reference","Simple conditional logic: one-time initial inspection + recurring interval","Single applicability criterion (all models)","No exceptions or nested conditions"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** Requires owners and operators of Schweizer (formerly Hughes) 269 series helicopters to inspect the fuel tank sump cap attachment.\n\n**Who it affects:** Anyone who owns, operates, or maintains any model of Schweizer/Hughes 269 series helicopters in Australia.\n\n**What must be done:**\n- **First inspection:** Must be completed within 100 hours of flight time after 31 December 1977\n- **Ongoing inspections:** Must be repeated every 300 hours of flight time thereafter\n\n**Why it matters:** Fuel tank sump caps that aren't properly attached can lead to fuel leaks, which creates fire hazards and potential engine failure. This directive ensures a specific mechanical defect is caught before it causes accidents.\n\n**Technical reference:** The directive points to Hughes Service Information Notice (SIN) No. N-148 for detailed inspection procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection","history":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection/history","analysis":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection/analysis","conflicts":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection/important-cases","documents":"/api/acts/ad-hu-269-61-fuel-tank-sump-cap-attachment-inspection/documents"}}