{"id":"F2006B05241","name":"AD/CESSNA 206/36 Amdt 1 - Bladder Type Fuel Cells","slug":"ad-cessna-206-36-amdt-1-bladder-type-fuel-cells","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45544,"registerId":"commonwealth-F2006B05241-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/36 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 206 Series Aeroplanes\n\nAD/CESSNA 206/36\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 is an amendment to an existing Airworthiness Directive. The background explicitly states the changes are editorial (removing fuel cap testing to a separate directive, adding log book requirements, and updating reference materials). The core safety purpose—addressing fuel cell wrinkles and contamination—remains consistent with the original directive."},"complexity_factors":["Multiple compliance pathways based on modification status (modified vs unmodified aircraft)","Cross-references to external Cessna documents (SIL SE 84-4, SIL SE 84-9 Rev 1, Owner Advisory SE 82-36A)","Time-based trigger points (31 August 1984, 30 June 1985) tied to 'Maintenance Release' cycles","Conditional ongoing obligations ('thereafter, for cells that exhibited signs... repeat at each issue')","Amendment structure requiring comparison with 'previous issue' for certain compliance obligations"],"plain_english_summary":"This mandatory AD orders owners/operators and maintenance engineers of affected Cessna 206 aircraft to inspect rubber bladder fuel cells for wrinkles or folds, purge the fuel system if contamination or moisture is found, and record outcomes in the aircraft log.  \n\nIt aims to prevent engine failure or fire by removing trapped moisture/debris that could compromise the fuel system."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment narrows and reallocates tasks: it removes the fuel cap testing requirement from this Directive (now dealt with separately), adds a mandatory log‑book statement requirement, and incorporates editorial \"Helpful Hints\" via Cessna SIL SE 84‑9 Rev 1. It also creates different replacement/inspection paths for aircraft modified under SIL SE 84‑9 Rev 1 versus unmodified aircraft, shifting some decision‑making to maintenance personnel following manufacturer guidance."},"complexity_factors":["Relies on external manufacturer documents (Cessna SIL SE 84‑4 and SE 84‑9 Rev 1) for technical instructions, shifting detail outside the Directive","Branching compliance rules depending on whether an aircraft was modified under SIL SE 84‑9 Rev 1","Recurring compliance tied to operational events (initially before further flight, at installation, and repeat at each Maintenance Release when defects found)","Record‑keeping requirement (log book statement) adds administrative burden and traceability obligations","Cross‑references removal of fuel cap testing to a separate Directive increases interdependence between instruments"],"plain_english_summary":"Mandates inspection of bladder‑type fuel cells on listed Cessna 206s per Cessna SIL SE 84‑4, requires recording results in the aircraft logbook, and requires purging the fuel system where cells show wrinkles or folds. Initial compliance is before further flight after 31 August 1984 for fitted cells and at installation thereafter; aircraft modified under Cessna SIL SE 84‑9 Rev 1 follow different replacement instructions. Operators and maintenance personnel bear inspection, purging and logbook costs; fuel cap testing was removed from this Directive and handled separately."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells","history":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells/history","analysis":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells/analysis","conflicts":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells/conflicts","importantCases":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells/important-cases","documents":"/api/acts/ad-cessna-206-36-amdt-1-bladder-type-fuel-cells/documents"}}