{"id":"F2006B08104","name":"AD/CESSNA 210/55 Amdt 1 - Bladder Type Fuel Cells - Inspection and Modification","slug":"ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115214,"registerId":"commonwealth-F2006B08104-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 210/55 Amdt 1 - Bladder Type Fuel Cells - Inspection and Modification","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 210 Series Aeroplanes\n\nAD/CESSNA 210/55\n\nAmdt 1\n\n  \n\nBladder Type Fuel Cells \\- Inspection and Modification\n\n  \n6/85\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,Rev 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":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains focused on its original purpose of fuel cell safety inspections. The changes from the previous issue are minor: removal of fuel cap testing (moved to a separate directive), addition of 'Helpful Hints' for maintenance staff, and new log book statement requirements. The core safety objective — preventing fuel contamination from wrinkled bladder cells — has not expanded beyond the original scope."},"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) that are not reproduced in the directive","Time-based compliance deadlines with conditional repeat requirements","Specific log book recording requirements","Amendment structure requiring comparison with previous issue for transitional compliance"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain Cessna 210 series aeroplanes to inspect bladder-type fuel cells for wrinkles or folds, purge the fuel system if defects are found, and record the results in the aircraft log book. It applies to aircraft listed by serial number in Cessna SIL SE 84-4 and to the maintenance engineers who service them.\n\nThe measure aims to prevent trapped moisture or contaminants that can cause fuel contamination, engine failure, or fire; compliance deadlines vary by modification and prior compliance status."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD updates previous requirements by incorporating the latest Cessna SIL SE 84-9 revision (including maintenance ‘Helpful Hints’), adding a mandatory logbook statement requirement, and removing fuel cap testing from this AD (that testing is now covered by a separate directive). It also establishes distinct procedures for aircraft modified under SE 84-9 Rev 1 versus unmodified aircraft (see Background; Compliance 1–3)."},"complexity_factors":["Conditional compliance paths depending on modification status (Compliance 1–3).","Requires following external service information documents (Cessna SIL SE 84-4 and SE 84-9 Rev 1).","Recordkeeping requirement (log book statement) tied to maintenance release timing.","Operationally specific remedial action (purging fuel system) triggered by observed defects (wrinkles/folds).","Cross-reference to separate directive for fuel cap testing (adds coordination burden)."],"plain_english_summary":"This directive requires owners/operators of specified Cessna 210 aircraft to inspect bladder-type fuel cells using Cessna SIL SE 84-4, record the inspection in the aircraft logbook, and purge the fuel system if fuel cells show wrinkles or folds. It sets different timing and follow-up steps depending on whether the aircraft has been modified per Cessna SIL SE 84-9 Rev 1 (see Compliance 1–3). Owners/operators pay for inspections, purging and log entries; CASA issues the directive and Cessna guidance determines the technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification","history":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-210-55-amdt-1-bladder-type-fuel-cells-inspection-and-modification/documents"}}