{"id":"F2006B05166","name":"AD/CESSNA 188/30 - Goodyear Fuel Cells","slug":"ad-cessna-188-30-goodyear-fuel-cells","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45288,"registerId":"commonwealth-F2006B05166-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 188/30 - Goodyear Fuel Cells","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 188 (Agwagon) Series Aeroplanes\n\n \n\nAD/CESSNA 188/30 Goodyear Fuel Cells 6/78\n\nApplicability: All models 188 fitted with Goodyear BTC-39 fuel cells. Requirement:  Action in accordance with Cessna SL No. SE78-10.\n\nCompliance: Within 100 hours time in service after 30 June 1978 and annually thereafter as detailed in Cessna SL No. SE78-10.\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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text defines a specific and limited scope: \"All models 188 fitted with Goodyear BTC-39 fuel cells\" (Applicability). The AD sets required actions by reference to Cessna SL No. SE78-10 and timing (Compliance). Nothing in the provided text indicates an enlargement or narrowing of that scope from an earlier or different stated intent."},"complexity_factors":["External reference: the AD requires actions \"in accordance with Cessna SL No. SE78-10\", so compliance depends on locating and following another document (Requirement).","Temporal compliance rule: an initial deadline tied to hours time in service (within 100 hours after 30 June 1978) plus an annual recurrence, which requires tracking flight hours and calendar scheduling (Compliance).","Narrow applicability: applies only to Cessna 188 aircraft fitted with a specific fuel cell model (Goodyear BTC-39), requiring operators to determine fleet applicability (Applicability).","Regulatory formality: an Airworthiness Directive imposes mandatory requirements under the civil aviation regulatory framework, creating legal obligations for operators to document and maintain compliance (header; Requirement)."],"plain_english_summary":"What this instrument does (mechanically)\n\n- This Airworthiness Directive (AD) requires owners/operators of certain Cessna 188 (Agwagon) aeroplanes to carry out the maintenance or inspection actions specified in Cessna Service Letter No. SE78-10. (See: \"Requirement\".)\n- The AD applies only to Cessna 188 models that are fitted with Goodyear BTC-39 fuel cells. (See: \"Applicability\".)\n- The timing for compliance is set out in the AD: the required action must be done within 100 hours time in service after 30 June 1978, and then repeated annually as detailed in the Cessna service letter. (See: \"Compliance\".)\n\nWho it affects and who pays\n\n- The AD affects the registered owners/operators of Cessna 188 aeroplanes that have Goodyear BTC-39 fuel cells installed (Applicability). Those owners/operators are responsible for arranging and paying for the required work (Requirement; Compliance).\n\nWhy it matters (operationally)\n\n- Mechanically, the AD imposes a mandatory maintenance/inspection workflow tied to a specific manufacturer’s service letter (Requirement). That changes operator behaviour by introducing a scheduled task: an initial action within the stated 100-hour window after 30 June 1978 and an annual repeat thereafter (Compliance).\n\nPractical implementation and incentive structure\n\n- The AD operates through a regulatory command: the Civil Aviation Safety Authority (CASA) issues the AD under the statutory airworthiness framework (header). Operators have an obligation to follow the service letter specified by the AD (Requirement).\n- Incentives: operators have to choose between allocating labour, parts, and aircraft downtime to meet the AD or risk non‑compliance with the AD. The AD therefore shifts maintenance cost and scheduling decisions onto the aircraft operators (Requirement; Compliance).\n\nCosts, trade-offs and compliance burden (concrete mechanisms)\n\n- Direct costs: payment for inspection, repair or replacement work required by Cessna SL No. SE78-10. (The AD references the service letter rather than specifying the work itself.) (Requirement.)\n- Time costs: the aircraft must be scheduled for the initial action within the 100‑hour window after 30 June 1978 and then for an annual recurrence, creating recurring out‑of‑service time (Compliance).\n- Administrative burden: locating and following Cessna SL No. SE78-10, recording compliance in maintenance logs, and scheduling recurring work. (Requirement; Compliance.)\n- Implementation risk: the AD points to an external document (Cessna SL No. SE78-10) for the operative steps; operators must obtain and correctly interpret that service letter to comply. Incorrect or incomplete implementation of the service letter would risk non‑conformity with the AD. (Requirement.)\n\nDiscretion and decision points\n\n- The AD prescribes that work be done \"in accordance with Cessna SL No. SE78-10\" (Requirement). The AD itself does not list technical options or alternatives; discretion over how work is carried out will be determined by the content of that service letter and by the operator’s choice of maintenance provider.\n\nEffects on market actors and private choice\n\n- The AD increases demand for maintenance services and parts for the subset of Cessna 188 aeroplanes fitted with the specified fuel cell. Operators must either perform work themselves (if authorised) or contract a maintenance organisation to carry out the service letter instructions, and they bear the cost and scheduling consequences. (Applicability; Requirement; Compliance.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1978 addressing a specific known defect in a specific aircraft component. It has not expanded beyond its original purpose of ensuring fuel cell integrity in Cessna 188 aircraft."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","Single defined applicability criterion (Cessna 188 models with Goodyear BTC-39 fuel cells)","No nested conditional logic or exceptions","Single cross-reference to external document (Cessna SL No. SE78-10) which contains the actual technical requirements","No interpretation section or defined terms within the instrument itself","Linear compliance structure: one-time initial action plus recurring annual requirement"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of agricultural aircraft.\n\n**What it does:**\n- Requires owners and operators of **Cessna 188 \"Agwagon\" series aeroplanes** (crop-dusting planes) to take specific safety action regarding their **Goodyear BTC-39 fuel cells** (the rubber bladders inside the fuel tanks).\n- The required action is detailed in **Cessna Service Letter No. SE78-10** — a technical bulletin from the manufacturer.\n\n**Who it affects:**\n- Anyone operating a Cessna 188 aircraft fitted with these specific Goodyear fuel cells.\n\n**When they must act:**\n- First inspection/replacement must happen **within 100 hours of flight time** after 30 June 1978.\n- Then **repeated annually** thereafter.\n\n**Why it matters:**\nFuel cells can degrade, leak, or fail over time. In an agricultural aircraft carrying chemicals and operating low and slow, a fuel leak creates serious fire and crash risks. This directive forces operators to check and maintain these components on a strict schedule to prevent accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells","history":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells/history","analysis":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells/analysis","conflicts":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells/conflicts","importantCases":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells/important-cases","documents":"/api/acts/ad-cessna-188-30-goodyear-fuel-cells/documents"}}