{"id":"F2006B02300","name":"AD/AL 60/4 Amdt 1 - Engine - Exhaust Manifold Failures - Inspection","slug":"ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41530,"registerId":"commonwealth-F2006B02300-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 60/4 Amdt 1 - Engine - Exhaust Manifold Failures - 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 60/4\n\nAmdt 1\n\n\nEngine - Exhaust Manifold Failures - Inspection 6/63\n\n \n\nApplicability: All models equipped with Continental TSIO-470-B engine. Document:  Aermacchi Lockheed 60 SB No. 1.\n\nCompliance: At intervals not exceeding 100 hours’ time in service after 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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is labelled as an amendment (“Amdt 1”), which indicates the original directive was changed. The supplied text does not include the earlier version, so the exact nature of the change (whether to applicability, interval, or technical detail) cannot be determined from this document alone. As presented, the scope now reads as applying to “all models equipped with Continental TSIO-470-B engine” with inspections every 100 hours after 1 September 1971 (Applicability; Compliance)."},"complexity_factors":["Narrow applicability limited to aircraft fitted with a specific engine model (Applicability).","Single, plainly stated compliance requirement with a fixed interval (100 hours) and a clear start date (1 September 1971) (Compliance).","Technical inspection procedures are not embedded in the AD; compliance depends on a separate referenced service bulletin (Aermacchi Lockheed 60 SB No. 1) (Document), which adds operational dependency and potential ambiguity.","No enforcement, penalty, or remediation details in the text — implementers must rely on broader regulatory framework not shown here.","Age and form of the document (an amendment: “Amdt 1”) imply historical context and possible changes to an earlier instrument, but the earlier text is not supplied, making precise scope-comparison harder."],"plain_english_summary":"The instrument mandates recurring inspections of the engine exhaust manifold on aeroplanes equipped with the Continental TSIO-470-B engine, at intervals not exceeding 100 hours’ time in service after 1 September 1971. It references the Aermacchi Lockheed 60 service bulletin for procedures, shifting recurring inspection cost and scheduling responsibility to operators and their maintenance providers to reduce manifold-failure risk."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific, targeted airworthiness directive focused solely on exhaust manifold inspections for one aircraft/engine combination. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 defined term implicitly used ('time in service')","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple conditional structure: single applicability criterion (specific engine type) and single compliance requirement (100-hour intervals)","No nested exceptions or complex logical operators","Single amendment (Amdt 1) suggesting minor update to original directive","Clear, unambiguous command structure: 'Applicability', 'Document', 'Compliance'"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Aermacchi-Lockheed AL 60 series aeroplanes** (small aircraft) that use a particular **Continental TSIO-470-B engine**.\n\n**What it requires:**\n- **Inspection of the engine's exhaust manifold** (the part that collects exhaust gases from the engine cylinders) to check for failures or cracks.\n- **How often:** Every 100 hours of flight time (\"time in service\") after 1 September 1971.\n- **Why:** Exhaust manifold failures can cause engine damage, power loss, or fire hazards — serious safety risks in flight.\n\n**Who must follow this:**\n- Owners and operators of affected aircraft.\n- Licensed aircraft maintenance engineers who perform the inspections.\n\n**Why it matters:**\nThis directive prevents catastrophic engine failures by catching exhaust manifold problems before they cause accidents. Non-compliance means the aircraft cannot legally fly in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection","history":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection/history","analysis":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection/analysis","conflicts":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection/conflicts","importantCases":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection/important-cases","documents":"/api/acts/ad-al-60-4-amdt-1-engine-exhaust-manifold-failures-inspection/documents"}}