{"id":"F2006B08076","name":"AD/CESSNA 210/26 - Fuel Quantity Placards - Revision","slug":"ad-cessna-210-26-fuel-quantity-placards-revision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115172,"registerId":"commonwealth-F2006B08076-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 210/26 - Fuel Quantity Placards - Revision","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 210 Series Aeroplanes\n\n \n\nAD/CESSNA 210/26 Fuel Quantity Placards - Revision 4/76\n\nApplicability: As detailed in the requirement document.\n\n \n\nRequirement: Revise the fuel quantity placards as detailed in Cessna SL SE75-7, Supplement No. 1. Compliance:              Models 210 and T210 as detailed in Cessna SL SE75-7, Supplement No. 1:\n\n(a)     If currently fitted with one or more replacement fuel cells bearing a manufacturing date of June 1973 or later - within 100 hours time in service after 16 April 1976.\n\n \n\n(b)     Concurrent with fitting one or more replacement fuel cells bearing a manufacturing date of June 1973 or later.\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":true,"description":"The instrument is styled as Revision 4/76, indicating it modifies an earlier directive. The current text prescribes revising fuel-quantity placards per Cessna SL SE75-7, Supplement No. 1 and sets specific compliance timings tied to replacement fuel-cell manufacture dates (June 1973 or later), including a 100-hour time-in-service window after 16 April 1976 and a concurrent-on-install requirement. The prior version(s) are not provided here, so the exact nature of the change from earlier text cannot be determined from this document alone; only that this edition imposes the cited placard revision and the two compliance timing conditions."},"complexity_factors":["Requirement references an external document (Cessna SL SE75-7, Supplement No. 1) for the exact placard content, which requires obtaining and following that separate document.","Applicability is limited to specific aircraft models (210 and T210) but determined by the service letter, adding an extra lookup step.","Timing conditions include both a retroactive compliance window (100 hours TIS after a fixed date) and a concurrent-on-install requirement, creating two distinct operational workflows for compliance.","The mechanical trigger depends on the manufacture date printed on replacement fuel cells (June 1973 or later), requiring verification of parts by date.","The directive is short and prescriptive but omits background justification and exact wording, increasing implementation reliance on the referenced service letter."],"plain_english_summary":"What this rule does (mechanically)\n\n- It requires revising the fuel-quantity placards on certain Cessna 210-series aeroplanes to match the text and layout specified in Cessna Service Letter SE75-7, Supplement No. 1. (Requirement; Cessna SL SE75-7, Supplement No. 1)\n\nWho it applies to\n\n- It applies to Cessna Model 210 and T210 aeroplanes, in the manner described in the referenced service letter. (Applicability)\n\nWhen operators must comply\n\n- If an aircraft already has one or more replacement fuel cells that bear a manufacturing date of June 1973 or later, the placards must be revised within 100 hours time-in-service after 16 April 1976. (Compliance (a))\n- If an aircraft is fitted with one or more replacement fuel cells bearing a manufacturing date of June 1973 or later, the placard revision must be done at the same time as fitting those cells. (Compliance (b))\n\nWho pays, who decides, and what changes in behaviour\n\n- Owners and operators of affected Cessna 210/T210 aeroplanes are responsible for carrying out and paying for the placard revision as specified. (Requirement)\n- The Civil Aviation Safety Authority enforces the directive by mandating compliance with the specified service letter; compliance is tied to the aircraft’s equipment (replacement fuel cells) and their manufacture dates. (Applicability; Requirement)\n- Maintenance personnel must consult and apply the exact placard text/layout from Cessna SL SE75-7, Supplement No. 1 when performing the revision. (Requirement)\n\nPractical implementation points, trade-offs and burdens\n\n- The directive references an external document (Cessna SL SE75-7, Supplement No. 1). Operators must obtain that service letter to know the precise placard content and placement. (Requirement)\n- Compliance imposes a discrete maintenance task (replace or revise placards) and associated labour/time and small parts cost on affected aircraft. (Requirement; Compliance (a),(b))\n- The rule links the obligation to the manufacture date printed on replacement fuel cells (June 1973 or later). That date threshold is the mechanical trigger that determines whether the placard revision is required. (Compliance (a),(b))\n- There is no allowance or discretionary exemption stated in the text; the timings are mandatory: within 100 hours TIS after 16 April 1976 for aircraft already fitted, and concurrent with fitting for new replacements. (Compliance (a),(b))\n\nSource claims and a brief test against costs and incentives\n\n- The directive’s stated action is to revise placards per the Cessna service letter. The likely rationale for mandating placard text is to ensure correct fuel-quantity information where certain replacement fuel cells are installed (this follows from the subject and the linkage to replacement fuel cells dated June 1973 or later). That rationale is a claim implicit in the instrument’s title and requirement; it is not elaborated in this text. (Title; Requirement)\n- Costs: the primary, concrete cost falls on owners/operators in the form of maintenance labour/time and any placard materials or installation expenses. (Requirement; Compliance (a),(b))\n- Incentives and trade-offs: because the obligation is triggered by the manufacture date shown on replacement fuel cells, operators and maintainers must check those dates and revise placards accordingly; this creates an operational step in maintenance workflows. The text itself does not provide alternative compliance paths or exemptions. (Requirement; Compliance (a),(b))\n\nCaveats about what this document does not say\n\n- The directive references Cessna SL SE75-7, Supplement No. 1 for the detailed placard content; the precise wording, location and any fitment instructions are contained in that external document and are not reproduced here. (Requirement)\n- The document does not state the safety analysis, test data, or incident history that motivated the revision; it sets the mandatory corrective action and timing but does not include the underlying evidence in this text. (Title; Requirement)\n\nKey text citations\n\n- \"Requirement: Revise the fuel quantity placards as detailed in Cessna SL SE75-7, Supplement No. 1.\" (Requirement)\n- Applicability: \"Models 210 and T210 as detailed in Cessna SL SE75-7, Supplement No. 1.\" (Applicability)\n- Compliance timing: \"(a) If currently fitted with one or more replacement fuel cells bearing a manufacturing date of June 1973 or later - within 100 hours time in service after 16 April 1976.\" and \"(b) Concurrent with fitting one or more replacement fuel cells bearing a manufacturing date of June 1973 or later.\" (Compliance (a),(b))"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive focused solely on fuel placard updates for specific Cessna models. It has not expanded beyond its original narrow safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (aircraft models and fuel cell manufacturing dates)","Simple binary compliance structure: either within 100 hours after a fixed date, or concurrent with installation","No cross-references to other legislation beyond a single Cessna service letter","No nested exceptions or conditional logic beyond the two compliance pathways","Single purpose: placard revision only"],"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 specific maintenance actions on aircraft.\n\n**What it does:** It orders owners and operators of **Cessna 210 series aeroplanes** to update (revise) the fuel quantity placards — the labels that tell pilots how much fuel is in the tanks. The new placards must match the specifications in a Cessna service letter (SL SE75-7, Supplement No. 1).\n\n**Who must comply:**\n- **Models 210 and T210** that have replacement fuel cells (fuel tanks) made in **June 1973 or later**\n- You must comply **within 100 hours of flying time** after 16 April 1976, **OR**\n- **At the same time** you install any replacement fuel cell made from June 1973 onwards\n\n**Why it matters:** Incorrect fuel quantity information can lead to fuel exhaustion, engine failure, and crashes. This directive ensures pilots have accurate fuel readings after certain fuel tank replacements that may have changed the aircraft's fuel system characteristics.\n\n**Key point:** This is a **time-critical safety mandate** — not optional. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision","history":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision/history","analysis":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision/analysis","conflicts":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision/conflicts","importantCases":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision/important-cases","documents":"/api/acts/ad-cessna-210-26-fuel-quantity-placards-revision/documents"}}