{"id":"F2006B08200","name":"AD/CESSNA 320/21 Amdt 6 - Engine Exhaust System","slug":"ad-cessna-320-21-amdt-6-engine-exhaust-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115410,"registerId":"commonwealth-F2006B08200-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/21 Amdt 6 - Engine Exhaust System","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)  Cessna 320 Series Aeroplanes\n\n \n\n# AD/CESSNA 320/21\n\nAmdt 6\n\nApplicability: All turbocharged models.\n\n# Engine Exhaust System 3/87\n\n \n\nRequirement:  1. Inspect engine exhaust system in accordance with Cessna SIL No. ME75-17, including “Expanded inspection and maintenance instructions” as detailed in Cessna SIL No. ME79-32.\n\n \n\n2.    Inspect those items listed in Table 2 of Cessna SIL No. ME79-32.\n\n \n\n3.    Replace multi-segment ‘V’ band exhaust clamps listed in Table 3 of Cessna SIL No. ME79-32.\n\nNote: FAA AD 75-23-08 Amdt 39-5451 Refers.\n\nCompliance: 1. At intervals not exceeding 50 hours time in service.\n\n \n\n2.    At intervals not exceeding 100 hours time in service.\n\n \n\n3.    At intervals not exceeding 750 hours time in service.\n\n \n\nBackground: This Directive has been amended to include reference to the latest FAA AD amendment.\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 AD maintains its original narrow scope: exhaust system safety for turbocharged Cessna 320 aircraft. Amendment 6 merely updates the background reference to the latest FAA AD without expanding the substantive requirements or applicability."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined compliance items with clear time intervals","References external technical documents (Cessna SILs) rather than embedding detailed technical specifications","No nested exceptions or conditional logic","Single applicability criterion ('All turbocharged models')","Minimal cross-referencing (one FAA AD reference in background only)"],"plain_english_summary":"CASA's AD mandates recurring inspections and periodic replacement of components in the engine exhaust system on all turbocharged Cessna 320 series aeroplanes, to detect cracks, corrosion or failing V‑band clamps. Owners/operators must follow Cessna Service Information Letters for inspection and clamp replacement at specified flight‑hour intervals to prevent carbon monoxide ingress, engine damage or fire. Amendment 6 updates references to align with the FAA."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment only updates the cross‑reference to the latest FAA AD amendment. Applicability (all turbocharged Cessna 320 models), required inspections, replacement actions, and specified compliance intervals remain unchanged."},"complexity_factors":["Cross‑references to external documents (Cessna SILs ME75‑17 and ME79‑32 and FAA AD), requiring operators to obtain and follow those documents.","Multiple, different compliance intervals (short inspection intervals plus a longer replacement interval) that operators must track against aircraft hours.","Technical nature of exhaust inspections and clamp replacement requiring qualified maintenance personnel and possible shop downtime.","Parts replacement logistics and potential aftermarket/availability issues for specific multi‑segment 'V' band clamps.","Regulatory enforcement by CASA — noncompliance carries operational/legal risk for operators.","Amendment history means operators must monitor AD updates and related FAA/manufacturer guidance for changes."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of turbocharged Cessna 320 aeroplanes to carry out periodic inspections of the engine exhaust system and to replace specified multi‑segment ‘V’ band exhaust clamps, using procedures in Cessna Service Information Letters and the referenced FAA AD. Inspections and replacements must be done at the published flight‑hour intervals.\n\nOwners/operators pay for inspections, parts and aircraft downtime; the Civil Aviation Safety Authority (CASA) requires and enforces compliance. The amendment updates the FAA AD reference."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system","history":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system/history","analysis":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system/analysis","conflicts":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system/conflicts","importantCases":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system/important-cases","documents":"/api/acts/ad-cessna-320-21-amdt-6-engine-exhaust-system/documents"}}