{"id":"F2006B05282","name":"AD/CESSNA 207/23 - Turbocharger","slug":"ad-cessna-207-23-turbocharger","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45670,"registerId":"commonwealth-F2006B05282-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 207/23 - Turbocharger","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 207 Series Aeroplanes\n\n \n\nAD/CESSNA 207/23 Turbocharger 6/80\n\nApplicability: Model 207 S/Nos. 20700001 thru 20700603. Requirement:  Action in accordance with Cessna SIL No SE 80-24.\n\nNote: FAA AD 80-07-01, Amdt 39-3719 refers.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1980.\n\n \n\nBackground: This Directive is issued to preclude a failure of the turbocharger anti-rotation pin and its ingestion into the scavenge pump. This in turn could cause a failure of the pressure and scavenge pump.\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":2,"scope_assessment":{"changed":false,"description":"The directive's scope is limited and focused: it applies only to Cessna 207 aeroplanes with the listed serial numbers and requires action according to the referenced Cessna Service Information Letter to prevent turbocharger anti-rotation pin failure. Nothing in the text indicates an expansion or narrowing of scope beyond that stated (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability to a defined set of serial numbers (Model 207 S/Nos. 20700001 thru 20700603)","Mandatory reliance on an external manufacturer document (Cessna SIL No SE 80-24) rather than detailed steps in the AD itself","Fixed and short compliance window (within 100 hours time in service after 30 June 1980)","Technical nature of the required action (turbocharger/anti-rotation pin), which requires specialist maintenance skills and parts"],"plain_english_summary":"What this rule does mechanically\n\n- Requires owners/operators of certain Cessna 207 aeroplanes (serial numbers 20700001 through 20700603) to carry out a specific maintenance/action described by the manufacturer (Cessna Service Information Letter No SE 80-24). This must be done within 100 hours time in service after 30 June 1980 (Applicability; Requirement; Compliance).\n\nOfficial stated purpose\n\n- The directive states its purpose is to prevent failure of the turbocharger anti-rotation pin and stop that pin being ingested into the scavenge pump, which could then cause failure of the pressure and scavenge pump (Background).\n\nWho is affected and who pays\n\n- Affected: owners and operators of Cessna 207 serial numbers 20700001–20700603 (Applicability).\n- Costs: the owners/operators must obtain and implement the manufacturer’s instruction (Cessna SIL No SE 80-24), and pay for parts, labour and any associated downtime. The directive itself does not specify compensation or funding (Requirement).\n\nWhat must be done and who decides how it is done\n\n- The directive requires compliance by performing the actions set out in Cessna SIL No SE 80-24. The SIL (manufacturer’s document) sets the technical steps; the aircraft owner/operator is responsible for ensuring the SIL is followed within the specified time window (Requirement; Compliance).\n\nTiming and enforcement\n\n- Work must be completed within 100 hours time in service after 30 June 1980 (Compliance). The AD references an FAA airworthiness directive (FAA AD 80-07-01, Amdt 39-3719) but places the mandatory obedience on complying with the Cessna SIL as stated (Note).\n\nImplementation, incentives and trade-offs\n\n- Incentives/costs: Owners/operators incur direct costs (parts, labour, downtime). The benefit (per the directive) is reduced risk of turbocharger-related pump failures (Background).\n- Dependence on manufacturer guidance: Compliance is tied to following Cessna SIL No SE 80-24. That concentrates technical decision-making in the manufacturer’s instructions; operators must obtain and apply that external document (Requirement).\n- Implementation risk and administrative burden: If the SIL is unavailable, unclear, or requires parts with lead times, operators face operational disruption. The AD sets a fixed compliance window (100 hours after 30 June 1980), creating scheduling pressure for active aircraft (Compliance).\n\nEffects on private choices and enterprise\n\n- The directive constrains maintenance choices for affected aeroplanes by mandating a specific manufacturer procedure within a defined timeframe (Requirement; Compliance).\n- Competitive or market effects are not set out in the directive; the immediate economic effect is on the operating costs and downtime of the specified aircraft owners/operators.\n\nSource citations\n\n- Applicability, Requirement, and Compliance are taken from the AD text (Applicability; Requirement; Compliance).\n- The stated safety rationale is taken from the Background paragraph (Background).\n- The AD cross-references FAA AD 80-07-01 (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 range. It has not expanded beyond its original purpose of preventing turbocharger-related engine failures."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 defined term implicitly referenced (Cessna SIL No SE 80-24)","Single, unambiguous compliance requirement with clear deadline","No nested exceptions or conditional logic","Simple linear structure: applicability → requirement → compliance → background","Cross-reference to FAA AD 80-07-01 is informational only, not a separate compliance obligation"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners and operators to fix a specific mechanical problem.\n\n**Who it affects:** Owners and operators of **Cessna 207 series aeroplanes** with serial numbers 20700001 through 20700603. These are small, single-engine utility aircraft often used for charter flights, cargo, and remote area operations.\n\n**What it requires:** Aircraft must undergo a specific maintenance action following **Cessna Service Information Letter (SIL) No. SE 80-24**. This involves inspecting or replacing a part related to the **turbocharger** (a device that boosts engine power at high altitudes).\n\n**Why it matters:** The turbocharger has an **anti-rotation pin** that can fail. If this pin breaks loose, it can get sucked into the **scavenge pump** (part of the engine's oil system), which could then cause both the oil pressure pump and scavenge pump to fail. This could lead to **catastrophic engine failure** in flight.\n\n**When it must be done:** Within **100 hours of flying time** after 30 June 1980.\n\n**Key point:** This is a **retroactive safety fix**. Even though these aircraft were already in service, the government mandated this repair to prevent accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-207-23-turbocharger","history":"/api/acts/ad-cessna-207-23-turbocharger/history","analysis":"/api/acts/ad-cessna-207-23-turbocharger/analysis","conflicts":"/api/acts/ad-cessna-207-23-turbocharger/conflicts","importantCases":"/api/acts/ad-cessna-207-23-turbocharger/important-cases","documents":"/api/acts/ad-cessna-207-23-turbocharger/documents"}}