{"id":"F2006B05202","name":"AD/CESSNA 205/18 - Fuel Selector Valve Safety Wire","slug":"ad-cessna-205-18-fuel-selector-valve-safety-wire","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45410,"registerId":"commonwealth-F2006B05202-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 205/18 - Fuel Selector Valve Safety Wire","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 205 (210-5) Series Aeroplanes\n\n \n\nAD/CESSNA 205/18 Fuel Selector Valve Safety Wire 5/85\n\nApplicability: Model 205 with S/Nos. 205-0001 to 205-0577. Requirement:  Action in accordance with Cessna SIL SE84-5.\n\nNote: FAA AD 85-02-07 refers.\n\n \n\nCompliance: Prior to issue of the next Maintenance Release after 31 May 1985.\n\n \n\nBackground: Loss of fuel selector control, followed by engine fuel starvation can occur should the roll pin connecting the fuel selector rotor shaft to the yoke assembly migrate out of its location. To prevent this possibility, safety wire is fitted to the roll pin thereby ensuring positive retention.\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":2,"scope_assessment":{"changed":false,"description":"The directive imposes a specific, limited technical modification on a defined set of aircraft (serial numbers 205-0001 to 205-0577) and requires compliance per the manufacturer's service information before the next Maintenance Release after 31 May 1985. The text does not expand obligations beyond that narrow scope (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability defined by explicit serial-number range (Applicability)","Single, clearly specified technical action (fit safety wire to roll pin) referenced to a single external procedural document (Requirement: Cessna SIL SE84-5)","Fixed compliance timing tied to the next Maintenance Release after a set date (Compliance)","Dependency on obtaining and following an external manufacturer service information letter (Requirement)","Regulatory enforcement through an airworthiness directive under CASA (header), but no multi-step certification or reporting regime described"],"plain_english_summary":"What this directive does (mechanical change)\n\n- Requires fitting safety wire to the roll pin that connects the fuel selector rotor shaft to the yoke assembly on Cessna 205 (210-5) series aeroplanes with serial numbers 205-0001 to 205-0577. The work must be done in accordance with Cessna Service Information Letter SE84-5 (\"Requirement\").\n- Timing: the modification must be completed before the aircraft is given its next Maintenance Release after 31 May 1985 (\"Compliance\").\n\nWhy the change is required (stated purpose)\n\n- The directive states that the roll pin can migrate out of position and, if it does, the fuel selector can be lost which may lead to engine fuel starvation. Fitting safety wire is described as the means to ensure the roll pin is positively retained (\"Background\").\n\nWho this affects and who decides\n\n- Affects owners/operators and maintenance organisations responsible for the listed Cessna 205 serial numbers (\"Applicability\").\n- The Civil Aviation Safety Authority issued the directive as part of the Schedule of Airworthiness Directives under the civil aviation regulatory framework (header: Civil Aviation Regulations 1998, PART 39 - Schedule of Airworthiness Directives). The maintenance-release authority on each aircraft determines when the next Maintenance Release is issued; the modification must be completed before that release is signed (\"Compliance\").\n\nPractical mechanics of compliance\n\n- The operator or their maintenance provider must obtain and use Cessna SIL SE84-5 as the procedural reference to fit safety wire to the specified roll pin (\"Requirement\").\n- The AD refers to a corresponding FAA airworthiness directive (FAA AD 85-02-07), which indicates related regulatory action in another jurisdiction (\"Note\").\n\nCosts, incentives, and trade-offs (source-grounded)\n\n- Direct compliance requires performing a maintenance task and recording it before the next Maintenance Release; that imposes a one-off labour and time requirement on the aircraft operator or maintenance provider (inferred from \"Requirement\" and \"Compliance\").\n- The directive reduces the risk of roll-pin migration by requiring a physical retention measure (safety wire), which substitutes a preventative modification for the alternative risk of in‑service failure (\"Background\").\n- Compliance depends on access to the external technical document (Cessna SIL SE84-5), so operators must obtain and follow that document to meet the AD (\"Requirement\").\n\nImplementation, compliance burden and risks (source-grounded)\n\n- The AD creates a mandatory action tied to maintenance-release procedures: aircraft must not be released without the action being completed as required (\"Compliance\").\n- Proper effect depends on correct application of the safety wire per the referenced service instruction; the directive does not describe alternative methods (\"Requirement\" and \"Background\").\n\nOther administrative notes\n\n- The directive is limited to the serial-number range listed (205-0001 to 205-0577) (\"Applicability\").\n- The directive cross-references FAA AD 85-02-07, indicating coordination or commonality with FAA action (\"Note\")."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft model. The scope remains precisely limited to the original safety concern — preventing fuel selector failure through a simple hardware modification. No scope creep is evident."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 defined applicability criteria (model and serial number range)","Single, straightforward mechanical requirement (install safety wire)","No nested exceptions or conditional logic","Cross-reference to only one external document (Cessna SIL SE84-5) and one FAA directive for background","Simple compliance deadline tied to a single event (next Maintenance Release after fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific Cessna 205 aircraft.\n\n**What it does:**\n- Requires owners/operators of certain Cessna 205 planes (serial numbers 205-0001 through 205-0577) to install a **safety wire** on the fuel selector valve\n- This safety wire prevents a small metal pin (the \"roll pin\") from slipping out of place\n\n**Why it matters:**\n- If that roll pin migrates out of position, the pilot can lose control of the fuel selector\n- This can cause **engine fuel starvation** — the engine cuts out because it isn't getting fuel\n- Engine failure in flight is obviously extremely dangerous\n\n**Who must comply:**\n- Anyone operating the affected Cessna 205 models\n- Must be done before the aircraft's next **Maintenance Release** (a document certifying an aircraft is airworthy) is issued after 31 May 1985\n\n**What owners need to do:**\n- Follow the instructions in **Cessna Service Information Letter SE84-5** (technical guidance from the manufacturer)\n- The FAA (American regulator) issued a similar directive (AD 85-02-07), which is noted for reference"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire","history":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire/history","analysis":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire/analysis","conflicts":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire/conflicts","importantCases":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire/important-cases","documents":"/api/acts/ad-cessna-205-18-fuel-selector-valve-safety-wire/documents"}}