{"id":"F2006B02294","name":"AD/AL 60/1 - Air Throttle Duct - Fuel Pressure Gauge Additional Line - Modification","slug":"ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41524,"registerId":"commonwealth-F2006B02294-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 60/1 - Air Throttle Duct - Fuel Pressure Gauge Additional Line - 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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aermacchi - Lockheed AL 60 Series Aeroplanes\n\n \n\nAD/AL 60/1 Air Throttle Duct - Fuel Pressure Gauge\n\nAdditional Line - Modification Applicability: All models equipped with Continental TSIO-470-B engine. Document:              Aermacchi Lockheed 60 Mod. Bulletin No. 1.\n\nCompliance:   Before 1 September 1971.\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\n6/63\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1963. It addresses one specific mechanical modification for one aircraft type. There is no evidence of scope creep; it remains tightly focused on its original safety purpose."},"complexity_factors":["Extremely short document — only 2 substantive paragraphs","No defined terms section","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple conditional structure: single applicability criterion (specific engine type)","Single compliance date with no exceptions or alternative methods","Relies entirely on external technical document (Modification Bulletin No. 1) for actual implementation details"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners to fix a specific mechanical problem.\n\n**What it does:** It orders owners of **Aermacchi-Lockheed AL 60 series aeroplanes** fitted with a **Continental TSIO-470-B engine** to modify the fuel system. Specifically, they must add an extra line to the fuel pressure gauge and modify the air throttle duct. The technical details are found in **Aermacchi Lockheed 60 Modification Bulletin No. 1**.\n\n**Who it affects:** Anyone who owns or operates these specific aircraft models in Australia.\n\n**Why it matters:** Fuel pressure and throttle systems are critical to engine operation. This modification prevents potential engine failure or fire hazards. **Compliance was required before 1 September 1971** — meaning this is a historical directive that applied to aircraft operating in that era.\n\n**Key takeaway:** This is a vintage safety mandate from 1963 (note the \"6/63\" marking) requiring a specific mechanical fix to prevent fuel system failures in a particular aircraft type."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied AD text applies to all AL 60 series aeroplanes equipped with the Continental TSIO-470-B engine and mandates the modification described in the referenced modification bulletin to be completed by a specified date. The provided text contains no indication that the scope has been altered from its original terms; it neither narrows nor expands the set of affected aircraft beyond the stated applicability."},"complexity_factors":["Terse directive text with a single clear action (install an additional line) and a single clear compliance date.","Limited applicability narrowly tied to AL 60 models fitted with the Continental TSIO-470-B engine (straightforward population).","Dependence on an external technical document (Aermacchi Lockheed 60 Mod. Bulletin No. 1) for implementation detail increases procedural steps but not legal complexity.","Regulatory enforcement falls under an established regime (Part 39 airworthiness directives), so legal authority is clear.","No substantive conditional exemptions, phased implementation, or reporting requirements are stated in the supplied text."],"plain_english_summary":"This AD requires owners/operators of Aermacchi–Lockheed AL 60 aeroplanes fitted with Continental TSIO‑470‑B engines to install an additional line in the air throttle duct area per Aermacchi Lockheed 60 Modification Bulletin No. 1, completed by 1 September 1971. Compliance, costs, and scheduling are the owner/operator’s responsibility; the AD enforces the requirement under the Part 39 airworthiness‑directive regime and relies on the referenced bulletin for technical details."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification","history":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification/history","analysis":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification/analysis","conflicts":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification/conflicts","importantCases":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification/important-cases","documents":"/api/acts/ad-al-60-1-air-throttle-duct-fuel-pressure-gauge-additional-line-modification/documents"}}