{"id":"F2006B02297","name":"AD/AL 60/12 - Empennage Centre Plane Assembly - Inspection","slug":"ad-al-60-12-empennage-centre-plane-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41527,"registerId":"commonwealth-F2006B02297-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 60/12 - Empennage Centre Plane Assembly - Inspection","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 60/12 Empennage Centre Plane Assembly - Inspection 2/75\n\nApplicability: Model AL 60-B2.\n\n \n\nDocument: Aermacchi Lockheed SB No. SB-L-0002.\n\n \n\nCompliance: Within 100 hours’ time in service after 28 February 1975 and thereafter at intervals not exceeding 100 hours’ time in service.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue Airworthiness Directive focused on a specific safety inspection for one aircraft model. It has not expanded beyond its original purpose of mandating repetitive inspections for the empennage centre plane assembly."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory content","No defined terms section — all terminology is standard aviation nomenclature","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","Simple conditional structure: single applicability criterion (Model AL 60-B2) and straightforward compliance timeline","Single technical reference to manufacturer service bulletin with no nested exceptions or alternative compliance methods"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:**\nIt requires owners and operators of a specific aircraft model (the Aermacchi-Lockheed AL 60-B2) to inspect a particular part of the plane's tail section called the \"empennage centre plane assembly.\" Think of the empennage as the tail of the aircraft — it includes the horizontal and vertical stabilisers that keep the plane stable in flight.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains an Aermacchi-Lockheed AL 60-B2 aircraft in Australia.\n\n**What they must do:**\n- **First inspection:** Within 100 hours of flying time after 28 February 1975\n- **Repeat inspections:** Every 100 hours of flying time thereafter\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. They are issued when a potential defect or unsafe condition is discovered in an aircraft type. Ignoring this directive means the aircraft cannot legally fly in Australian airspace. The reference to \"SB-L-0002\" points to a Service Bulletin from the manufacturer — essentially the manufacturer's own technical instructions on how to perform this inspection.\n\nThis particular directive dates from 1975 (note the \"2/75\" suffix), indicating it addresses a safety concern identified in that era for this specific Italian-designed utility aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The provided text shows a narrowly scoped AD that applies to Model AL 60-B2 and prescribes a fixed inspection interval referencing SB-L-0002. There is no information in the supplied text indicating the scope has been expanded or narrowed from any prior or original instrument. The text itself does not compare the current scope to an earlier intent or version, so no change is evident from this source alone."},"complexity_factors":["Narrow applicability: applies only to Model AL 60-B2 (\"Applicability: Model AL 60-B2.\")","Single, short compliance rule: fixed inspection interval of 100 hours with a specified initial deadline (\"Compliance: Within 100 hours’ time in service after 28 February 1975 and thereafter at intervals not exceeding 100 hours’ time in service.\")","Procedural detail delegated to an external service bulletin (SB-L-0002), creating dependency on another document for full compliance (\"Document: Aermacchi Lockheed SB No. SB-L-0002.\")","No explanatory rationale or quantified risk/benefit in the provided text, which leaves policy justification and benefit measurement outside this instrument (source contains no explicit rationale).","No alternative compliance or exemption language in the text provided, producing a straightforward yes/no compliance decision rather than a discretionary regime (no alternative compliance language present)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Aermacchi‑Lockheed AL 60‑B2 aircraft to inspect the empennage centre plane assembly per Service Bulletin SB‑L‑0002, beginning within 100 hours after 28 February 1975 and repeated at intervals not exceeding 100 hours. It mandates recurring maintenance, relies on the service bulletin for technical procedure, and imposes inspection costs and downtime on affected operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection","history":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection/history","analysis":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection/analysis","conflicts":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection/conflicts","importantCases":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection/important-cases","documents":"/api/acts/ad-al-60-12-empennage-centre-plane-assembly-inspection/documents"}}