{"id":"F2006B05174","name":"AD/CESSNA 188/39 Amdt 1 - Bladder Type Fuel Cells","slug":"ad-cessna-188-39-amdt-1-bladder-type-fuel-cells","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45315,"registerId":"commonwealth-F2006B05174-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 188/39 Amdt 1 - Bladder Type Fuel Cells","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 188 (Agwagon) Series Aeroplanes\n\nAD/CESSNA 188/39\n\nAmdt 1\n\n  \nBladder Type Fuel Cells 6/85\n\nApplicability: All models with S/Nos as listed in Cessna SIL SE 84-4.\n\nRequirement: Inspect fuel cells in accordance with Cessna SIL SE 84-4 and record the result in the aircraft log book. Where cells exhibit wrinkles or folds, purge fuel system of moisture or other contaminants.\n\nNote: Additional information on fuel system purging is contained in Cessna Owner Advisory SE 82-36A.\n\nCompliance: 1. AIRCRAFT NOT MODIFIED IN ACCORDANCE WITH CESSNA SIL SE 84-9,\n\nRev 1.\n\nInitially, before further flight after 31 August 1984 for cells currently fitted, and at installation of any cell after 31 August 1984. Thereafter, for cells that exhibited signs of unacceptable wrinkles or folds at initial inspection, repeat the system purging procedures at each issue of a new Maintenance Release.\n\n    2. AIRCRAFT MODIFIED IN ACCORDANCE WITH CESSNA SIL SE 84-9, Rev 1.\n\nWhen future cell replacement is required, carry out further instructions required by Attachment No. 1 of Cessna SIL SE 84-9 Rev 1.\n\n    3. For aircraft that have complied with the previous issue of this Directive, the log book statement requirement shall be made before the issue of the next Maintenance Release after 30 June 1985.\n\nBackground: This Directive promulgates the latest revision to Cessna SIL SE 84-9 containing “Helpful Hints” useful to maintenance personnel. The fuel cap testing requirement has been removed and now becomes the subject of a separate Directive. Editorial changes and a requirement for log book statements are also included.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: ensuring safe bladder fuel cell maintenance in Cessna 188 aircraft. The amendment merely updates reference materials, removes one requirement (fuel cap testing) to a separate directive, and adds administrative requirements (log book statements). No scope creep detected."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 3 defined compliance pathways based on modification status","Cross-references to 3 external Cessna documents (SIL SE 84-4, SIL SE 84-9 Rev 1, Owner Advisory SE 82-36A)","Simple conditional logic: 'if unmodified do X, if modified do Y, if previously complied do Z'","No nested exceptions or recursive definitions","Single applicability criterion (serial number list in external document)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators and maintenance engineers of certain Cessna 188 \"Agwagon\" aircraft to inspect rubber bladder fuel cells for wrinkles or folds, purge the fuel system if contaminants or water are found, and record actions in the aircraft log book. It prevents engine failure and fire risks from trapped moisture or debris."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment updates the prior directive by adopting the latest Cessna SIL SE 84-9 (including 'Helpful Hints'), removing the fuel cap testing requirement (now handled by a separate Directive), and adding an explicit log book statement requirement. Mechanically, it shifts one inspection element out of this AD and adds administrative record-keeping and modified compliance timelines tied to aircraft modification status."},"complexity_factors":["Dependence on external Cessna documents (SIL SE 84-4, SIL SE 84-9 Rev 1, and Owner Advisory SE 82-36A) for procedural detail increases compliance steps and the need to cross-reference materials.","Different compliance paths for unmodified vs modified aircraft (paragraphs 1 and 2) require operators to determine modification status and apply different triggers (immediate before flight, at replacement), increasing administrative complexity.","Repeat-action requirement: where unacceptable wrinkles/folds are found, purging must be repeated at each new Maintenance Release (paragraph 1), creating recurring workload and record-keeping obligations.","Log book statement requirement (paragraph 3) ties compliance to Maintenance Release timing and creates an ongoing administrative duty for operators and maintenance organisations.","Technical judgement required: maintenance personnel must assess 'wrinkles or folds' and decide when purging is necessary, introducing subjective assessment and reliance on technician competence.","Applicability limited to serial numbers listed in the SIL means operators must match aircraft S/Ns against the SIL to confirm applicability.","Removal of the fuel cap testing requirement and its relocation to a separate directive (Background) requires monitoring and compliance with an additional instrument."],"plain_english_summary":"Requires owners/operators of Cessna 188 (Agwagon) aircraft with listed serial numbers to have bladder-type fuel cells inspected per Cessna SIL SE 84-4, purge the fuel system if cells show wrinkles or folds, and record the result in the aircraft log book. Compliance times differ depending on whether the aircraft has been modified under Cessna SIL SE 84-9; maintenance personnel must follow the referenced SIL procedures and bear responsibility for inspection and purging."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells","history":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells/history","analysis":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells/analysis","conflicts":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells/conflicts","importantCases":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells/important-cases","documents":"/api/acts/ad-cessna-188-39-amdt-1-bladder-type-fuel-cells/documents"}}