{"id":"F2006B08193","name":"AD/CESSNA 320/15 Amdt 1 - Fuel Crossover Line - Inspection and Modification","slug":"ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115402,"registerId":"commonwealth-F2006B08193-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/15 Amdt 1 - Fuel Crossover Line - Inspection and 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)  Cessna 320 Series Aeroplanes\n\n \n\nAD/CESSNA 320/15\n\nAmdt 1\n\nApplicability: All models.\n\n\nFuel Crossover Line - Inspection and Modification\n\n\n7/75\n\n \n\nDocument: 1. Cessna SL ME70-39, Rev. 1; or\n\n \n\n2. FAA AD 75-11-01.\n\n \n\nCompliance: Within 100 hours time in service after 29 August 1975.\n\nNote: Compliance with the preceding issue of this Directive satisfies compliance with this issue of the Directive.\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment does not expand or narrow the stated population of affected aircraft: applicability remains 'All models' (Applicability). The directive preserves continuity with the prior issue by stating that prior compliance satisfies this amendment (Note), indicating no material change in scope from the preceding issue."},"complexity_factors":["Reliance on external technical documents (Cessna SL ME70-39 Rev.1 or FAA AD 75-11-01) for detailed procedures increases operational complexity because the AD itself contains no step-by-step instructions (Document).","A fixed compliance timeframe tied to a historical date requires operators to calculate remaining allowable time-in-service and schedule work within that window (Compliance).","Applicability to all models broadens the population of affected aircraft but simplifies scope determination (Applicability).","The short form of the directive leaves interpretation and judgement about applicability and modification details to maintenance personnel referencing the external documents (Document; Schedule context).","The note that prior compliance with the preceding issue satisfies this issue reduces procedural duplication but requires record checks to confirm earlier compliance (Note)."],"plain_english_summary":"This airworthiness directive requires owners/operators of all Cessna 320 series aeroplanes to inspect and, if necessary, modify the fuel crossover line per Cessna Service Letter ME70‑39 Rev.1 or FAA AD 75‑11‑01. Actions must be completed within 100 hours’ time in service after 29 August 1975; prior compliance with the earlier issue satisfies the requirement.\n\nOperators bear the cost; CASA issues the requirement and the referenced documents set the technical procedures."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused specifically on fuel crossover lines in Cessna 320 aircraft. It has not expanded beyond its original technical safety purpose. Amendment 1 appears to be a minor administrative or technical update that does not alter the scope — the note explicitly states prior compliance satisfies this version."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 substantive requirement (inspect and modify fuel crossover line)","No defined terms section","No nested conditional logic or exceptions","Single cross-reference to external technical documents (Cessna SL and FAA AD)","Simple compliance deadline (100 hours time in service after fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for **Cessna 320 series aeroplanes**.\n\n**What it does:**\n- Requires owners and operators to **inspect and modify the fuel crossover line** on these aircraft.\n- A fuel crossover line is a pipe or hose that allows fuel to flow between tanks or engines; defects here can cause fuel leaks, engine failure, or fire.\n\n**Who must comply:**\n- Anyone who owns or operates any model of Cessna 320 aircraft.\n\n**What must be done:**\n- Follow the technical instructions in either:\n  - **Cessna Service Letter ME70-39, Revision 1** (the manufacturer's guidance), OR\n  - **FAA AD 75-11-01** (the equivalent American safety order).\n- Complete the work **within 100 hours of flight time** after 29 August 1975.\n\n**Why it matters:**\n- This prevents potentially catastrophic fuel system failures. The directive was originally issued in July 1975 (hence \"7/75\") and this version (Amendment 1) updates it. If you already complied with the original version, you're covered — you don't need to do it again.\n\n**Key takeaway:** If you fly or maintain a Cessna 320, you needed to check and fix the fuel crossover line by a specific flight-hour deadline, following the manufacturer's or FAA's instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification","history":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-320-15-amdt-1-fuel-crossover-line-inspection-and-modification/documents"}}