{"id":"F2006B10647","name":"AD/HU 269/88 - Collective Pitch Mixer Bellcrank","slug":"ad-hu-269-88-collective-pitch-mixer-bellcrank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116558,"registerId":"commonwealth-F2006B10647-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/88 - Collective Pitch Mixer Bellcrank","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 269/88 Collective Pitch Mixer Bellcrank 11/87\n\nApplicability: All model 269A, 269A-1 and 269B. All model 269C helicopters having a S/No prior to 1274.\n\nRequirement: Action in accordance with Schweizer Service Information Notice No N204. Compliance:               1. At next schedule inspection for issue of Maintenance Release after 31 October\n\n1987.\n\n \n\n2. Before installation on an aircraft after 31 October 1987.\n\n \n\nBackground: An incorrect collective pitch mixer bellcrank may have been fitted to some 269 Series helicopters.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1604},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive remains tightly focused on its original purpose—correcting a specific hardware defect in a defined aircraft series. There is no evidence of scope expansion beyond the immediate safety issue of incorrect bellcrank installation."},"complexity_factors":["Single operational requirement referencing one external technical document","No defined terms, interpretation clauses, or legislative cross-references","Simple binary applicability test (model and serial number)","Straightforward compliance trigger with only two alternative deadlines"],"plain_english_summary":"This mandatory Airworthiness Directive requires operators of Schweizer/Hughes helicopters (models 269A, 269A‑1, 269B, and 269C with serials before 1274) to inspect the collective pitch mixer bellcrank per Schweizer Service Information Notice No. N204 and replace any incorrect part before further flight. Compliance is due by the next scheduled maintenance after 31 Oct 1987 or before installing the component after that date. It addresses a safety risk from incorrect bellcranks that can impair collective control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank","history":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank/history","analysis":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank/analysis","conflicts":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank/conflicts","importantCases":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank/important-cases","documents":"/api/acts/ad-hu-269-88-collective-pitch-mixer-bellcrank/documents"}}