{"id":"F2006B10617","name":"AD/HU 269/55 - Lateral Cyclic Trim Control Assembly - Inspection","slug":"ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116497,"registerId":"commonwealth-F2006B10617-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/55 - Lateral Cyclic Trim Control Assembly - 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 269/55 Lateral Cyclic Trim Control Assembly - Inspection 8/76\n\nApplicability: Model 269C with S/Nos. 0162 to 0455, 0458 to 0463, 0465 to 0469, 0471 to 0475, and any model 269A, 269A-1, 269Bor 269C equipped with a P/N 269A7316-3,-5, -7,\n\n-9 or -11 cyclic trim control assembly: Document: 1. Hughes SIN No. N-138; or\n\n2. FAA AD 76-10-02.\n\n \n\nCompliance: Within 25 hours time in service after 28 July 1976.\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":3,"scope_assessment":{"changed":false,"description":"The directive limits its scope to named helicopter models/serial-number ranges and to aircraft fitted with specified part numbers. The excerpt contains no language expanding or narrowing that applicability beyond those lists or changing the target population; it simply prescribes an inspection and points to external technical documents. Based on the text provided, the scope set out in the Applicability section is the operative scope and shows no indication of a change from the directive's stated applicability."},"complexity_factors":["Narrow technical scope limited to a specific component (lateral cyclic trim control assembly).","Applicability requires cross-checking serial-number ranges and part numbers to determine whether an aircraft is affected.","External-document dependence: inspection procedure and possible corrective actions are specified in Hughes SIN N-138 or FAA AD 76-10-02 rather than in the directive text.","Short, fixed compliance window (25 hours after a dated reference) creates scheduling pressure for operators.","Regulatory provenance: issued by Civil Aviation Safety Authority and referencing an FAA AD and manufacturer service information introduces multi-source compliance obligations."],"plain_english_summary":"What this instrument does (mechanically)\n\n- Requires an inspection of the lateral cyclic trim control assembly on certain Schweizer (Hughes) 269 series helicopters. (See “Applicability”.)\n- Sets a deadline for that inspection: it must be completed within 25 hours time in service after 28 July 1976. (See “Compliance”.)\n- Directs operators to the specific service documents for the inspection procedure: Hughes Service Information Notice No. N-138 or FAA Airworthiness Directive 76-10-02. (See “Applicability”.)\n\nWho is affected\n\n- Owners and operators of Model 269C helicopters with serial numbers 0162–0455, 0458–0463, 0465–0469, and 0471–0475. (Applicability.)\n- Any Model 269A, 269A-1, 269B or 269C helicopter that is fitted with a cyclic trim control assembly having part number 269A7316-3, -5, -7, -9 or -11. (Applicability.)\n\nWhy it matters (stated purpose and practical effects)\n\n- The directive requires a timely inspection of a named flight-control component on a defined set of helicopters. The instrument identifies the component by part number and points to two external technical documents to determine the inspection content. (Applicability; references: Hughes SIN N-138; FAA AD 76-10-02.)\n- Practically, the rule shifts responsibility for arranging and paying for the inspection onto the aircraft owner/operator, because those parties are the ones who must have the inspection performed within the 25-hour window. (Compliance.)\n\nImplementation, incentives and trade-offs (source-grounded)\n\n- Who pays and who acts: The owner/operator must have the inspection done within the stated time frame; the text specifies the compliance deadline but does not allocate funding, so inspection costs fall to the operator or their maintenance provider. (Compliance; Applicability.)\n- Where to find the inspection procedure: The directive refers operators to Hughes SIN N-138 or FAA AD 76-10-02 for the technical inspection instructions. That creates dependence on those external documents for the exact work to be done. (Applicability.)\n- Time pressure and opportunity cost: The 25-hour service-time limit imposes a near-term scheduling requirement on operators and maintenance facilities; complying may require rearranging flight schedules or paying for expedited maintenance. (Compliance.)\n- Scope and targeting: The requirement applies only to helicopters within the serial-number ranges listed or those fitted with the listed part numbers, concentrating the inspection burden on those specific aircraft. (Applicability.)\n\nPractical compliance considerations mentioned or implied by the text\n\n- Operators must check whether their helicopter serial number is within the listed ranges or whether the specified part number is installed; that determines whether the directive applies. (Applicability.)\n- The inspection must be carried out within the stated time window after 28 July 1976; the text does not specify follow-up actions or corrective measures in this excerpt—those would be contained in the referenced Hughes or FAA documents. (Compliance; Applicability.)\n\nSource citations\n\n- Applicability: model and serial-number ranges; part-number list; references to Hughes SIN N-138 and FAA AD 76-10-02.\n- Compliance: deadline of completion \"within 25 hours time in service after 28 July 1976.\"\n\nNotes on limits of the text\n\n- The instrument excerpt prescribes that an inspection must occur and points to external documents for how to perform it, but the excerpt does not state the inspection procedure itself, any required corrective actions, penalties, or cost-sharing arrangements. Those matters would be in the referenced Hughes or FAA documents or in other regulatory material."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue Airworthiness Directive issued in 1976 (as indicated by the '8/76' suffix and the 28 July 1976 compliance date). It has not expanded beyond its original purpose of addressing a specific safety issue with the lateral cyclic trim control assembly on specific helicopter models."},"complexity_factors":["Single, specific maintenance action required (one inspection)","Limited applicability — only specific serial numbers and part numbers affected","No defined terms section or complex interpretive provisions","Simple compliance deadline (25 hours time in service after fixed date)","References external technical documents rather than embedding detailed procedures","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific helicopters.\n\n**What it does:**\nOrders owners and operators of certain Schweizer (formerly Hughes) 269 series helicopters to inspect the **lateral cyclic trim control assembly** — a component that helps pilots control the helicopter's side-to-side movement. The inspection checks for a potential safety defect.\n\n**Who it affects:**\n- **Model 269C helicopters** with specific serial numbers (0162 to 0455, 0458 to 0463, 0465 to 0469, 0471 to 0475)\n- **Any 269A, 269A-1, 269B, or 269C model** equipped with specific part numbers for the cyclic trim control assembly (P/N 269A7316-3, -5, -7, -9, or -11)\n\n**What must be done:**\nOperators must complete the inspection within **25 hours of flight time** after 28 July 1976. The technical details of how to perform the inspection are found in two referenced documents: Hughes Service Information Notice No. N-138 or the US Federal Aviation Administration's AD 76-10-02.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. Failing to comply can ground an aircraft and expose operators to penalties. This particular AD addresses a specific mechanical component that, if faulty, could affect flight control safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection","history":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection/history","analysis":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection/analysis","conflicts":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection/important-cases","documents":"/api/acts/ad-hu-269-55-lateral-cyclic-trim-control-assembly-inspection/documents"}}