{"id":"F2006B10819","name":"AD/INST/18 - Collins PN-101 Pictorial Navigation System Slaving Accessory 328A-3G - Modification","slug":"ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56297,"registerId":"commonwealth-F2006B10819-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/INST/18 - Collins PN-101 Pictorial Navigation System Slaving Accessory 328A-3G - Modification","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/18 Collins PN-101 Pictorial Navigation System\n\nSlaving Accessory 328A-3G - Modification\n\nApplicability: Slaving accessory type 328A3G with S/Nos. 1500 to 4034. Document:  Collins SB No. 14.\n\nCompliance: Before 28 February 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\n \n\n \n\n \n\n\n8/75\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2014},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, standalone technical directive targeting a specific aircraft component. It remains limited to the original safety modification requirement without expansion into broader operational or administrative matters."},"complexity_factors":["Single, unambiguous compliance action (perform modification)","Clear applicability criteria (specific model and serial number range)","Fixed compliance deadline with no conditional extensions","No internal cross-references, definitions, or nested exceptions","Extremely short length (under 100 words of operative text)"],"plain_english_summary":"This is a **safety directive** (an Airworthiness Directive) issued by the Civil Aviation Safety Authority.\n\n**What it does**\nIt orders owners or operators of aircraft fitted with a specific navigation instrument—the **Collins PN-101 Pictorial Navigation System Slaving Accessory** (model 328A-3G with serial numbers 1500 through 4034)—to carry out a mandatory modification to that device.\n\n**What you must do**\nYou must perform the modification exactly as described in **Collins Service Bulletin No. 14** and complete it **before 28 February 1976**.\n\n**Why it matters**\nThis ensures the gyroscopic slaving accessory (which keeps the aircraft's directional gyro aligned with magnetic north) functions safely. Operating an aircraft without this modification violates civil aviation safety regulations and invalidates the aircraft's airworthiness certificate.\n\n**Who is affected**\nAnyone responsible for an aircraft carrying the specified slaving accessory, identified by serial numbers 1500 to 4034."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification","history":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification/history","analysis":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification/analysis","conflicts":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification/conflicts","importantCases":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification/important-cases","documents":"/api/acts/ad-inst-18-collins-pn-101-pictorial-navigation-system-slaving-accessory-328a-3g-modification/documents"}}