{"id":"F2006B10839","name":"AD/INST/36 - Collins ALI-80( ) Barometric Altimeter","slug":"ad-inst-36-collins-ali-80-barometric-altimeter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56323,"registerId":"commonwealth-F2006B10839-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/INST/36 - Collins ALI-80( ) Barometric Altimeter","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Instruments and Automatic Pilots\n\n \n\nAD/INST/36 Collins ALI-80( ) Barometric Altimeter 2/89\n\nApplicability: All ALI-80 (P/N 622-2292-001 to -008),\n\n \n\nALI-80A (P/N 622-3975-001 to -008),\n\n \n\nALI-80B (P/N 622-4425-001 to -008),\n\n \n\nALI-80L (P/N 622-6238-001 to -008), and\n\n \n\nALI-80M (P/N 622-2701-001)\n\n \n\nbarometric altimeters which do not have SB21 marked out on the unit modification chart.\n\n \n\nRequirement: Action in accordance with Collins ALI-80( ) SB21. Compliance:  Prior to 31 August 1989.\n\nBackground: Overheating of the Digital Servo Module can occur which may cause smoke in the cockpit.\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":2505},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive remains tightly scoped to its original purpose: rectifying a specific overheating defect in Collins ALI-80 series altimeters. It has not expanded beyond this specific safety issue and equipment range."},"complexity_factors":["Requires cross-referencing to external manufacturer technical document (Collins Service Bulletin 21) not provided in the directive text","Applicability determined by specific manufacturer part numbers (P/N) requiring technical matching against aircraft records","Conditional exclusion for units already marked with SB21 on modification charts","Technical aviation terminology (Digital Servo Module, barometric altimeter, modification charts)"],"plain_english_summary":"This AD mandates that operators of aircraft fitted with specific Collins ALI-80 series barometric altimeters must install the modification in Collins Service Bulletin 21 to cure a Digital Servo Module overheating defect that can produce smoke in the cockpit. Compliance was required before 31 August 1989. It affects aircraft still fitted with units not marked as having SB21."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter","history":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter/history","analysis":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter/analysis","conflicts":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter/conflicts","importantCases":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter/important-cases","documents":"/api/acts/ad-inst-36-collins-ali-80-barometric-altimeter/documents"}}