{"id":"F2006B03826","name":"AD/BEECH 35/26 - Fuel Selector Valve","slug":"ad-beech-35-26-fuel-selector-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43422,"registerId":"commonwealth-F2006B03826-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/26 - Fuel Selector Valve","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)  Beechcraft 35 (Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 35/26 Fuel Selector Valve 12/69\n\nApplicability: All models fitted with fuel unit assembly P/N 35-924065. Requirement:  Action in accordance with Beechcraft SI No. 0243-289. Compliance:               Within 100 hours time in service after 23 December 1969.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text provided sets a single, specific scope: all Beechcraft 35 models with fuel unit assembly P/N 35-924065 must comply with Beechcraft SI No. 0243-289 within the stated 100‑hour window. The document contains no amendment history or language indicating a change of scope from an earlier version, so there is no evidence in the text that the scope has changed from the instrument’s original terms."},"complexity_factors":["Narrow technical scope: applies only to aircraft with a single identified part number (P/N 35-924065).","Dependency on an external technical document (Beechcraft SI No. 0243-289) which contains the detailed work instructions.","Fixed, time-bound compliance window (100 hours time in service after a specified date) requiring operators to schedule maintenance.","Regulatory/legal obligation: the AD makes the Service Instruction mandatory rather than advisory, creating enforceable compliance duties for operators.","Operational impact components: need for parts, skilled labour and aircraft downtime can vary by operator and location, affecting ease of compliance."],"plain_english_summary":"This AD requires owners/operators of Beechcraft 35 (Bonanza) aircraft fitted with fuel unit assembly P/N 35‑924065 to carry out the actions in Beechcraft Service Instruction No. 0243‑289 and complete that work within 100 hours time‑in‑service after 23 December 1969. It creates a legally binding, time‑bound maintenance obligation that operators must schedule and fund, with compliance enforced by the Civil Aviation Safety Authority."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive from 1969 addressing a specific mechanical defect in a specific aircraft part. It has not expanded beyond its original narrow scope."},"complexity_factors":["Single, specific applicability criterion (one part number)","Single requirement referencing an external technical document","Simple compliance condition (time-in-service deadline)","No defined terms section","No cross-references to other legislation","No conditional logic or exceptions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- Requires owners/operators of specific Beechcraft 35 (Bonanza) series aeroplanes to inspect or fix a problem with the **fuel selector valve** (the mechanism that lets pilots choose which fuel tank to draw from).\n- The directive references a specific Beechcraft Service Instruction (SI No. 0243-289) that details exactly what needs to be done.\n\n**Who it affects:**\n- Anyone who owns or operates a Beechcraft 35 series aircraft fitted with a specific fuel unit assembly (part number 35-924065).\n\n**Why it matters:**\n- Fuel selector valve failures can cause engine stoppage or fuel starvation — obviously catastrophic in flight. This AD mandates a fix before a deadline to prevent accidents.\n\n**Compliance deadline:**\n- The work must be completed within 100 hours of flight time after 23 December 1969.\n\n**In short:** If you've got this specific Beechcraft model with this specific fuel part, you must follow the manufacturer's service bulletin and fix the valve within 100 flying hours of the deadline."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-26-fuel-selector-valve","history":"/api/acts/ad-beech-35-26-fuel-selector-valve/history","analysis":"/api/acts/ad-beech-35-26-fuel-selector-valve/analysis","conflicts":"/api/acts/ad-beech-35-26-fuel-selector-valve/conflicts","importantCases":"/api/acts/ad-beech-35-26-fuel-selector-valve/important-cases","documents":"/api/acts/ad-beech-35-26-fuel-selector-valve/documents"}}