{"id":"F2006B10620","name":"AD/HU 269/58 - Linear Clutch Actuator End Fitting and Shaft - Inspection","slug":"ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116503,"registerId":"commonwealth-F2006B10620-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/58 - Linear Clutch Actuator End Fitting and Shaft - Inspection","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 269/58 Linear Clutch Actuator End Fitting and Shaft \\- Inspection\n\n  \n6/77\n\nApplicability: All models with Linear clutch actuators P/N 269A4564 or DL 1020M82C (24V) or DL 1020M48 or DL 1020M81C (12V) NOTE: Helicopters fitted with the 269A4564- 5 (24V clutch actuators assembly are not affected.\n\nDocument: Hughes SIN No. N-141.1. (FAA AD 77-07-01) refers.\n\nCompliance: For Part II. At each daily inspection after 30 June 1977, until modified in accordance with Part I.\n\nFor Part III. Within 100 hours time in service after 30 June 1977 and thereafter at intervals not exceeding 100 hours time in service, until modified in accordance with Part I.\n\nNote: The inspection detailed in Part II of this requirement document shall be entered on the maintenance release as maintenance required. That inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. That inspection may also be performed and certified by any Licensed Aircraft Maintenance Engineer.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1977 addressing a specific mechanical defect. It has not expanded beyond its original purpose of ensuring clutch actuator integrity pending modification."},"complexity_factors":["Short, single-purpose directive with clear applicability criteria","Only 3 specific part numbers affected (with one explicit exemption)","Simple two-tier compliance structure (daily visual + 100-hour detailed)","Minimal cross-referencing (only to Hughes Service Information Notice and FAA AD)","Straightforward conditional logic: 'until modified in accordance with Part I'","Single defined term implicitly understood (Part I/II/III refer to sections of the source document not reproduced here)"],"plain_english_summary":"This Airworthiness Directive from CASA orders inspections of the linear clutch actuator end fitting and shaft on Schweizer/Hughes 269 helicopters to prevent clutch failure. Daily visual checks are required until a permanent modification is fitted, with more detailed 100‑hour inspections by a licensed maintenance engineer.\n\nIt affects owners/operators using the original actuator parts (excluding helicopters fitted with the improved 269A4564‑5) and matters because the original design posed a safety risk; daily checks can be done by the pilot."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text itself does not indicate a change from an earlier intended scope. It plainly sets applicability to helicopters with the listed actuator part numbers, excludes a specific sub-assembly (269A4564-5), and prescribes inspection intervals until modification per Part I; no expansion or narrowing of that applicability is stated in the document."},"complexity_factors":["Multiple specific affected part numbers (269A4564, DL 1020M82C, DL 1020M48, DL 1020M81C) requiring accurate conformity checks","Different compliance regimes referenced (Part II: daily inspections; Part III: 100‑hour inspections) creating operational scheduling requirements","Condition that inspections continue only 'until modified in accordance with Part I' introduces a dependency on a separate modification action","Permitted performer/certification variations (pilot may perform daily inspection without certification; Licensed Aircraft Maintenance Engineer may perform and certify) affect who documents compliance","Cross-references to external documents (Hughes SIN N-141.1 and FAA AD 77-07-01) require consulting other sources for full technical and procedural detail","Explicit exception for 269A4564-5 (24V) assemblies means operators must identify sub-variants precisely"],"plain_english_summary":"This airworthiness directive requires inspections of the linear clutch actuator end fitting and shaft on Schweizer (Hughes) 269-series helicopters fitted with specified actuator part numbers; it sets daily and 100‑hour inspection intervals until the assembly is modified per Part I. Owners/operators must arrange and bear inspection costs; the pilot-in-command may perform the daily check without certification while licensed aircraft maintenance engineers may perform and certify other inspections. The directive refers to Hughes SIN N-141.1 and FAA AD 77-07-01 for details."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection","history":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection/history","analysis":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection/analysis","conflicts":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection/important-cases","documents":"/api/acts/ad-hu-269-58-linear-clutch-actuator-end-fitting-and-shaft-inspection/documents"}}