{"id":"F2006B10577","name":"AD/HU 269/101 - Throttle Control Linkage Restriction","slug":"ad-hu-269-101-throttle-control-linkage-restriction","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116417,"registerId":"commonwealth-F2006B10577-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/101 - Throttle Control Linkage Restriction","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)  \nSchweizer (Hughes) 269 Series Helicopters\n\nAD/HU 269/101 Throttle Control Linkage Restriction 8/93\n\nTX\n\nApplicability: All models; 269A with fuel injected engines, 269A1 and 269B, and 269C S/n 0004 to 1480 and 1482 to 1486; with engine driven fuel pump drain tube assembly P/N 269A8326-95 installed.\n\nRequirement: Action in accordance with Schweizer SB B-235.1\n\nNote: FAA AD 93-05-11 Amdt 39-8515 refers.\n\nCompliance: Part I: Within 5 hours time in service after 02 June 1993.\n\nPart II: Within 5 hours time in service after 02 June 1993 and thereafter at intervals not exceeding 25 hours time in service.\n\nPart III: a. Prior to 02 December 1993, or\n\nb. Prior to further flight \\- where the tube is found to be less than 7.50 inches (190.50mm) or is found at any time to interfere with the throttle linkage.\n\nThis Directive must be entered on to the Maintenance Release as maintenance required. After the initial inspection, Part II of the Requirement Document may be performed by the pilot in command and a certification is to be made against AD/HU 269/101 on the Maintenance Release at each inspection. A copy of this Directive and the Requirement Document must be carried in the aircraft.\n\nBackground: This Directive is issued in response to an incident overseas, where throttle travel was restricted due to interference from the fuel drain tube assembly.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a defined aircraft fleet. It has not expanded beyond its original purpose of preventing throttle interference from a fuel drain tube."},"complexity_factors":["Single, specific mechanical issue with clear physical measurements (7.50 inches/190.50mm)","Three distinct compliance phases with unambiguous deadlines (calendar date and flight hours)","Limited applicability scope (specific helicopter models, serial number ranges, and one part number)","Simple cross-reference to one FAA directive and one manufacturer service bulletin","No nested exceptions or conditional logic — requirements are sequential and additive","Plain language background explaining the safety rationale"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and corrective action for certain Schweizer (Hughes) 269 helicopters with fuel pump drain tube P/N 269A8326-95, to address a risk that the tube can bend and obstruct the throttle, causing loss of power control.  \n\nAffected owners/operators must inspect, perform recurring checks and replace any short or interfering tube; the AD is legally binding and must be recorded on the aircraft’s maintenance release, with copies of the AD and service bulletin carried on board."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The Directive, as written, targets a specific subset of 269-series helicopters with a particular drain-tube part to address an identified incident. The source gives no indication that its scope was altered from that incident-driven purpose; it limits applicability by model, serial number ranges, and part number."},"complexity_factors":["Applicability covers multiple models and narrow serial-number ranges (Applicability section).","Applies only where a specific part is installed (engine driven fuel pump drain tube assembly P/N 269A8326-95).","Multiple compliance parts with differing deadlines and triggers (Compliance: Part I, Part II, Part III).","A hard measurement threshold governs one trigger (tube length less than 7.50 inches / 190.50 mm) and a qualitative interference test (Part III).","Recurring inspection cadence (25‑hour intervals) plus an immediate-before-flight requirement if interference is found.","Recordkeeping and on‑board carriage obligations: must be entered on the Maintenance Release and a copy carried in the aircraft; certification required at each inspection.","After initial inspection, Part II inspections may be performed by the pilot in command (changes who may lawfully perform and certify the check).","Compliance depends on following an external service bulletin (Schweizer SB B-235.1) and references an FAA AD, creating cross-referenced obligations."],"plain_english_summary":"This Airworthiness Directive requires operators of certain Schweizer (Hughes) 269-series helicopters with a specific engine-driven fuel pump drain tube (P/N 269A8326-95) to inspect and, if needed, fix any throttle-control interference following Schweizer SB B-235.1. CASA requires an initial inspection within 5 flight hours, recurring checks (up to 25‑hour intervals), and immediate action if the tube is too short or interferes. Owners/operators bear compliance costs; after the first inspection pilots may perform recurring checks, and maintenance entries plus an onboard copy of the directive are required."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction","history":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction/history","analysis":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction/analysis","conflicts":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction/conflicts","importantCases":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction/important-cases","documents":"/api/acts/ad-hu-269-101-throttle-control-linkage-restriction/documents"}}